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OFFICE OF THE ADDITIONAL DIRECTOR GENERAL OF METEOROLOGY (RESEARCH) INDIA METEOROLOGICAL DEPARTMENT 2006 INDIA METEOROGLOGICAL DEPARTMENT CONTENTS PREFACE INTRODUCTION MODEL A MODEL B MODEL C MODEL D MODEL E TABLE VI FIGURES DESIGNED & AUTHORED AT THE METEOROLOGICAL OFFICE PRESS PUNE AERONAUTICAL CLIMAT LOGICAL SUMMARIES (INDIRA GANDHI INTERNATIONAL) O WMO MODELS - A, B, C, D, E & Table VI BASED ON DATA FOR THE PERIOD 1998 - 2002 NEW DELHI AIRPORT
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Page 1: AERONAUTICAL CLIMAT LOGICAL O SUMMARIES CONTENTS

2006

OFFICE OF THEADDITIONAL DIRECTOR GENERAL OF METEOROLOGY

(RESEARCH)INDIA METEOROLOGICAL DEPARTMENT

2006

INDIAMETEOROGLOGICAL

DEPARTMENT

C O N T E N T S

PREFACE

INTRODUCTION

MODEL A

MODEL B

MODEL C

MODEL D

MODEL E

TABLE VI

FIGURES

DESIGNED & AUTHOREDAT THE

METEOROLOGICAL OFFICE PRESSPUNE

AERONAUTICAL CLIMAT LOGICALSUMMARIES

(INDIRA GANDHI INTERNATIONAL)

O

WMO MODELS - A, B, C, D, E & Table VIBASED ON DATA FOR THE PERIOD 1998 - 2002

NEW DELHI

AIRPORT

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P R E F A C E

Meteorological services for Aviation are very essential for making air

navigation safe, cost effective and efficient. Aircrafts mostly fly in the lower

atmosphere where most of the weather systems develop and decay during their life

cycle. The relevant information of meteorological parameters - particularly

atmospheric pressure, weather, wind, visibility & runway visual range (RVR), cloud

height and temperature are needed for the operation of an aircraft from take off to

the landing phases. Apart from current weather, climatology of an airport is also very

important for determination of runway orientation, flight planning and to understand

weather factors affecting a particular airport at a particular time.

It is therefore very essential that climatology of an airport is available as a

ready reckoner to understand frequencies of various weather elements in different

temporal scales which affect aircraft operations.

Earlier, Aeronautical Climatological Summaries in respect of four International

Airports were first published by India Meteorological Department in 1975. In view of

the explosive growth in aviation industry and also in view of rapid advancement in

information and computing technology, it has become necessary to update these

summaries and also to extend them to other airports. With this in view Aeronautical

Climatological Summaries for twenty International and National Airports using the

data for the period 1998-2002 are presented in the pattern of WMO models A, B, C,

D, E and Table VI in accordance with the procedures laid down in Technical

Regulations and as per ICAO Annex. 3.

These models are described below:

MODEL A Monthly mean number of occurrences of runway visual range/ visibility and / or height of the base of the lowest cloud layer (in metres), covering more than 4/8th of the sky below specified values at the specified time.

MODEL B Monthly mean number of visibility below specified values (in metres) at the specified time.

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E F

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MODEL C Monthly mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified time.

MODEL D Monthly mean number of occurrences of concurrent wind direction (in 30° sectors) and wind speed (in knots) within specified ranges.

MODEL E Monthly mean frequency of occurrences of screen temperature (°C) in specified ranges of 5 degrees of the specified time.

TABLE VI Monthly mean atmospheric pressure (in hPa) at the reference level / mean sea level (for low level stations) at the standard times for surface synoptic observations.

In addition to the above models and table, useful Climatological information in

pictorial form based on long period data is also provided at the end of each model.

These climatological summaries have been prepared by the Surface

Statistics and Planning section, Office of the Additional Director General of

Meteorology (Research), Pune under the guidance of Shri Thakur Prasad, Deputy

Director General of Meteorology (Climatology) and Dr. T. P. Singh, Meteorologist.

Valuable contributions were made by Smt. S. V. Mhasawade, A.M. I, Shri A.

B. Bhole, S.A., Shri P. S. Balki, S. A. and Smt S. H. Joshi, S.O. towards the

preparation of these Summaries. The required software for quality control of data,

preparation of normal of meteorological parameters and tables in these models was

developed by Shri A. K. Jaswal, Meteorologist at the National Data Centre, Pune.

The designing and the printing of these manuscripts were done by Shri Abraham

Philipose, A.M. II at the DTP and printing unit. My appreciation goes to all of them.

I am hopeful that this updated publication will serve as a useful source of

adequate and authentic information to aviation services.

Pune – 5 September 2006

Dr. (Mrs.) N. Jayanthi DDGM (WF)

LACD of ADGM(R)

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E F

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i

I n t r o d u c t i o n

Delhi is the capital city of India since old times. Delhi is one of the most historic capitals in the world and two of its monuments- Qutub Minar and Humayun’s Tomb are known as world heritage sites. Delhi is today, one of the fastest growing cities of India which is having a population of around 13.8 million. It is also capital of the state of Delhi. It is widely spread over 1483 square kilometers and is surrounded by two states- Uttar Pradesh and Haryana. It is the gateway to India, being well linked by road, rail and air to important cities of the country. It serves as a perfect introduction to the cultural wealth, the complexities and dynamism of India. Delhi, besides being the seat of Central Government, has an economy supported by tourism, commerce, and a growing information technology industry. It is also epicenter of the nation’s politics, economy and culture. It has a number of leading educational institutes for higher learning, training, research and development in science, medicine, engineering and technology. With the development of architectural infrastructure facilities, Delhi plays host to a number of national and international events including sports related events, conferences and seminars. Delhi is an international hub of export and import of goods in the country.

Indira Gandhi International Airport, New Delhi (Lat. 28º34’ N and Long. 77º07’ E) is situated at Palam in the south-western part of the city at an altitude of 233 metres. The airport is one of India’s main domestic and international gateways. It is connected with major cities of India and other countries. It has two terminals. Terminal- 2 at new building of the airport is used for international flights while Terminal-1 (older airport Palam) is exclusively used for domestic operations. It has two runways-main runway 10-28 is about 4 km long and an auxiliary runway 09-27 is about 3 km long. Runway 10-28 is equipped with CAT III-B instrument landing system which is one of the few runways in Asia. It is the first Indian airport which is operating two runways simultaneously. The airport is the home of several Indian airlines including Air Sahara, Spice Jet, Alliance Air and IndiGo Airlines. Some airlines use this airport as their second hub after Mumbai’s CSI Airport. It is used by various national and international airlines. The airport handles an average of 490 daily scheduled commercial movements including 130 international flights. The airport operates round the clock and currently handles up to 22 landing and takeoff per hour. On 30th March, 2006, the airport reached a record number of 551 of arrivals and departures. The climate of Delhi is of continental nature. The city has an extreme type of weather, very hot in summer season and very cold in winter season. Sometimes it is affected by western disturbances, mist, fog, thunderstorms, dust storms and squalls. Meteorological Office at the airport Delhi started functioning since January 1952 and is equipped with modern instruments to record and report meteorological parameters. During January and February weather in Delhi is cold. The cold wave from the Himalayan region makes winter very chilly. Sometimes western disturbances occur and give significant amount of rain in this period. Mist and fog are generally experienced in

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the morning and late night hours. The mean maximum and minimum temperatures are around 23ºC and 7ºC respectively. In the month of March the weather is pleasant in Delhi where maximum and minimum temperatures are around 30ºC and 14ºC respectively. The summer season in Delhi practically starts from April and extends up to June. The weather is hot and dry and on few occasion heat wave prevails in this season. The mean maximum and minimum temperatures during this period are around 39ºC and 24ºC respectively. The monsoon season commences from last week of June and extends up to September. Average rainfall in the monsoon season is 699.0 mm which is 88% of average annual rainfall of 794.0 mm. Sometimes it rains heavily in Delhi in this season. The highest rainfall ever recorded in 24 hours is 265.8 mm on 9th July, 1972. The mean maximum and minimum temperatures in this season are around 35ºC and 25ºC respectively. During the months October and November weather is generally fair and pleasant in Delhi where mean maximum and minimum temperatures are around 31ºC and 15ºC respectively. In the month of December weather becomes cold and sometimes fog prevails in morning and late night. Sometimes western disturbances occur and give a good amount of rainfall. The maximum and minimum temperatures in this month are around 23ºC and 7ºC respectively. The highest maximum temperature and the lowest minimum temperature ever recorded at this airport are 47.5ºC on 26th May, 1984 and -2.2ºC on 1st January, 1952 respectively.

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FI

GU

RE

S

AERONAUTICALCLIMATOLOGICAL

SUMMARIES

FIG. 1(a) - NO. OF WEATHER PARAMETERS

FIG. 1(b) - RELATIVE HUMIDITY

FIG. 1(c) - AVERAGE MONTHLY RAINFALL

FIG. 2(a) - VISIBILITY - MORNING

FIG. 2(b) - VISIBILITY - AFTERNOON

FIG. 3(a) - CLOUD AMOUNT - MORNING

FIG. 3(b) - LOW CLOUD AMOUNT - MORNING

FIG. 3(c) - HEIGHT OF LOW CLOUD - MORNING

4 AFTERNOON

4 AFTERNOON

4 AFTERNOON

FIG. (a) - CLOUD AMOUNT -

FIG. (b) - LOW CLOUD AMOUNT -

FIG. (c) - HEIGHT OF LOW CLOUD -

FIG. 5 - WINDROSES - MORNING

FIG. 6 - WINDROSES - AFTERNOON

FIG. 7(a) - MONTHLY MEAN TEMPERATURE

FIG. 7(b) - HIGHEST MAXIMUM TEMPERATURE - EVER RECORDED

FIG. 7(c) - LOWEST MINIMUM TEMPERATUER - EVER RECORDED

FIG. 8 - STATION LEVEL PRESSURE

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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AERONAUTICALCLIMATOLOGICAL

SUMMARIES

MO

DE

L-

A

JANUARY FEBRUARY MARCH

APRIL MAY JUNE

JULY AUGUST SEPTEMBER

OCTOBER NOVEMBER DECEMBER

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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CLIMATOLOGICAL SUMMARY

MODEL – A

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34' N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07' E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times.

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 1.2 1.8 3.6 6.4 2.4 5.6 2.8 0.8 24.601 1.2 1.2 5.2 5.6 2.6 5.4 2.8 0.8 24.802 2.0 1.8 4.8 3.6 4.6 5.6 2.6 0.4 25.403 2.8 1.8 3.2 2.2 7.4 4.2 3.4 0.4 25.404 1.8 1.2 3.6 1.8 6.6 3.4 6.2 0.6 25.205 0.4 0.6 2.4 1.4 7.4 2.2 9.0 2.0 25.406 1.2 0.6 6.2 3.2 10.4 3.8 25.407 0.2 0.8 5.0 2.8 10.2 7.0 26.008 0.6 3.0 2.2 10.6 9.2 25.609 0.2 2.8 0.4 11.8 10.2 25.410 0.2 1.4 1.8 12.0 9.6 25.011 1.4 1.6 12.4 9.8 25.212 2.0 2.4 13.2 7.8 25.413 0.8 1.0 6.2 14.8 2.2 25.014 0.2 1.8 0.8 9.8 11.6 1.0 25.215 0.2 3.8 1.4 12.0 7.6 0.4 25.416 0.6 6.0 2.0 11.0 5.6 0.2 25.417 1.6 6.2 3.2 9.4 4.6 0.2 25.218 2.0 6.2 4.2 9.0 3.6 0.6 25.619 0.2 0.2 2.4 6.0 4.2 8.0 3.6 0.8 25.420 0.2 0.8 3.0 5.4 3.4 7.4 4.0 0.8 25.021 1.0 0.8 2.6 5.4 3.2 7.4 3.8 1.0 25.222 0.8 1.4 3.4 6.2 2.8 6.2 3.2 1.2 25.223 1.4 1.4 3.8 6.2 1.8 6.6 2.8 1.2 25.2

TOTAL 13.0 13.0 44.2 77.2 80.8 133.8 172.6 72.0 606.6

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CLIMATOLOGICAL SUMMARY

MODEL – A

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.2 2.8 3.6 4.0 9.6 6.0 1.0 27.201 2.6 4.4 4.8 9.2 5.4 0.6 27.002 0.2 2.6 3.2 8.4 7.6 4.4 0.4 26.803 2.2 3.2 9.8 5.6 5.8 0.2 26.804 1.4 1.6 7.8 5.0 9.4 1.8 27.005 0.4 0.6 4.2 3.4 13.4 4.6 26.606 1.6 1.2 15.0 9.4 27.207 0.8 1.0 10.2 14.6 26.608 0.2 0.4 0.4 5.2 20.0 26.209 0.2 0.8 3.8 22.0 26.810 0.2 0.2 0.2 4.0 21.4 26.011 0.4 4.4 20.8 25.612 0.2 4.8 21.2 26.213 1.4 7.6 17.8 26.814 0.2 2.0 15.6 8.8 26.615 0.4 6.0 16.8 3.8 27.016 0.6 0.2 8.0 15.8 2.4 27.017 1.2 0.2 9.6 14.0 2.0 27.018 0.2 2.8 0.2 9.0 13.2 1.8 27.219 0.2 2.6 1.4 9.4 11.4 2.2 27.220 0.4 3.4 0.8 10.4 10.4 1.6 27.021 1.2 2.8 2.2 10.0 9.8 1.2 27.222 0.2 1.4 2.6 3.4 9.8 8.8 1.0 27.223 0.2 1.4 2.8 4.8 9.8 6.8 1.4 27.2

TOTAL 0.4 0.6 16.8 36.0 55.6 130.0 222.0 182.0 643.4

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CLIMATOLOGICAL SUMMARY

MODEL – A Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.2 0.4 2.2 0.8 6.6 15.0 3.4 28.601 0.2 0.4 2.4 2.0 7.2 14.2 2.0 28.402 0.2 0.4 1.6 5.8 7.6 11.4 1.6 28.603 0.4 0.2 0.6 7.2 3.8 14.4 2.4 29.004 0.2 3.0 3.6 16.0 6.2 29.005 0.2 0.2 0.6 14.6 13.2 28.806 0.2 9.0 19.2 28.407 0.2 3.0 25.4 28.608 2.2 26.8 29.009 1.6 26.6 28.210 1.2 25.8 27.011 0.2 0.2 1.4 24.8 26.612 0.2 0.2 1.2 26.0 27.613 3.0 25.8 28.814 0.2 10.0 18.8 29.015 0.4 18.2 10.4 29.016 0.8 21.4 6.4 28.617 1.8 21.0 6.0 28.818 4.0 20.6 4.4 29.019 0.2 0.4 5.2 18.8 4.4 29.020 0.2 0.2 0.4 5.8 17.8 4.2 28.621 0.2 0.4 8.2 15.6 4.4 28.822 0.4 1.0 8.4 14.4 4.2 28.423 0.2 0.2 2.2 0.2 6.8 15.4 3.6 28.6

TOTAL 1.8 1.8 11.4 20.4 71.6 281.4 296.0 684.4

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CLIMATOLOGICAL SUMMARY

MODEL – A

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.2 5.2 18.8 5.2 29.401 0.2 1.2 4.6 20.0 4.0 30.002 2.2 3.0 20.6 4.0 29.803 1.2 2.2 20.0 6.6 30.004 1.4 16.0 12.6 30.005 0.2 10.6 19.2 30.006 0.2 6.4 23.0 29.607 4.2 24.6 28.808 3.2 23.8 27.009 0.2 3.2 20.8 24.210 3.4 20.6 24.011 3.6 20.4 24.012 4.0 23.8 27.813 0.2 4.6 24.8 29.614 0.2 0.4 9.6 19.6 29.815 0.8 18.8 10.2 29.816 1.2 22.8 5.8 29.817 0.2 1.8 23.8 4.0 29.818 2.4 23.6 4.0 30.019 3.0 22.6 4.4 30.020 3.2 21.8 5.0 30.021 3.6 20.6 5.8 30.022 4.2 19.4 5.8 29.423 0.2 4.6 18.8 6.2 29.8

TOTAL 0.6 5.2 42.2 340.4 304.2 692.6

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CLIMATOLOGICAL SUMMARY

MODEL – A Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.2 2.6 19.6 8.4 30.801 1.0 2.4 18.8 8.2 30.402 0.2 1.6 1.8 16.2 11.0 30.803 0.2 1.0 1.6 13.2 14.6 30.604 0.8 0.6 13.0 16.6 31.005 0.2 0.4 10.4 20.0 31.006 0.2 0.4 0.2 9.2 20.8 30.807 9.6 20.4 30.008 0.2 8.6 20.6 29.409 0.2 9.0 20.6 29.810 0.4 8.6 20.8 29.811 0.2 0.2 9.6 19.6 29.612 0.8 9.4 19.6 29.813 0.2 1.0 10.6 18.4 30.214 1.4 13.2 16.0 30.615 0.2 1.0 19.6 10.2 31.016 0.2 2.0 21.2 7.6 31.017 3.0 20.6 7.0 30.618 2.8 21.6 6.4 30.819 2.8 21.2 6.8 30.820 3.0 20.6 7.4 31.021 2.8 19.8 8.4 31.022 2.8 19.0 8.6 30.423 0.2 1.8 19.0 9.0 30.0

TOTAL 0.2 1.4 6.0 35.0 361.6 327.0 731.2

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CLIMATOLOGICAL SUMMARY

MODEL – A Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times.

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.2 2.0 17.0 9.2 28.401 0.6 2.2 16.6 9.2 28.602 0.6 2.2 16.8 9.0 28.603 0.2 1.8 14.6 11.8 28.404 0.2 0.6 12.2 15.2 28.205 0.6 9.0 18.8 28.406 0.6 7.8 19.6 28.007 0.2 0.2 7.4 20.4 28.208 0.2 0.6 0.4 5.8 20.8 27.809 0.2 7.0 19.8 27.010 0.2 0.2 0.2 5.8 21.0 27.411 0.4 0.4 5.4 21.4 27.612 0.2 0.6 6.0 21.4 28.213 0.2 0.4 6.6 21.4 28.614 0.2 0.6 8.2 19.2 28.215 0.2 0.6 11.2 16.0 28.016 0.6 13.0 14.4 28.017 0.6 15.2 12.4 28.218 0.6 15.0 13.0 28.619 0.6 15.6 12.0 28.220 0.6 15.4 11.8 27.821 0.2 0.8 14.4 12.8 28.222 0.2 1.0 15.6 11.2 28.023 0.2 1.2 15.6 10.8 27.8

TOTAL 0.4 1.0 3.6 19.6 277.2 372.6 674.4

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CLIMATOLOGICAL SUMMARY

MODEL – A

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times.

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.2 1.2 15.2 14.6 31.201 0.4 1.6 14.8 13.8 30.602 0.4 1.8 14.0 14.6 30.803 0.2 0.8 14.2 16.0 31.204 0.2 0.2 11.4 19.4 31.205 0.2 0.2 8.6 22.0 31.006 0.4 7.6 22.8 30.807 0.2 7.0 23.0 30.208 0.2 0.2 5.6 24.2 30.209 0.2 6.0 24.0 30.210 0.2 0.4 0.2 6.4 23.4 30.611 0.2 7.8 22.6 30.612 0.2 8.2 22.2 30.613 0.2 8.8 21.6 30.614 0.2 10.4 20.2 30.815 12.6 17.8 30.416 0.2 14.6 16.2 31.017 15.8 15.0 30.818 17.0 14.0 31.019 15.4 15.4 30.820 0.2 16.2 14.6 31.021 0.4 15.2 15.0 30.622 1.0 14.6 15.2 30.823 0.2 1.4 14.0 15.4 31.0

TOTAL 0.2 0.4 3.0 10.0 281.4 443.0 738.0

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CLIMATOLOGICAL SUMMARY

MODEL – A Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times.

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 1.2 12.0 12.4 25.601 0.2 1.2 12.4 11.6 25.402 0.2 1.2 10.2 13.8 25.403 0.2 0.6 10.0 15.0 25.804 0.4 8.4 16.8 25.605 0.2 0.2 6.4 18.8 25.606 0.4 5.4 19.6 25.407 0.2 4.8 20.2 25.208 0.4 3.0 21.8 25.209 0.2 0.2 0.2 3.6 21.6 25.810 0.8 4.0 21.2 26.011 0.4 0.4 4.0 21.2 26.012 0.2 4.4 21.2 25.813 0.2 5.8 20.0 26.014 0.2 0.6 8.2 17.0 26.015 0.2 0.4 9.8 15.6 26.016 0.8 10.6 14.6 26.017 0.2 0.4 11.4 14.0 26.018 0.2 0.6 12.0 13.0 25.819 0.6 12.8 12.4 25.820 0.4 12.8 12.8 26.021 0.6 11.4 13.6 25.622 1.0 11.2 13.4 25.623 0.8 11.6 13.4 25.8

TOTAL 1.0 1.6 13.6 206.2 395.0 617.4

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9

CLIMATOLOGICAL SUMMARY

MODEL – A Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times.

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.2 1.8 17.6 10.2 29.801 0.4 1.8 18.0 9.2 29.402 0.4 3.0 15.4 11.0 29.803 1.8 14.6 13.4 29.804 0.2 0.8 11.6 17.4 30.005 0.2 0.6 8.6 20.6 30.006 0.4 5.8 23.6 29.807 0.6 4.0 25.2 29.808 0.6 4.4 25.0 30.009 0.2 0.4 4.0 24.8 29.410 0.4 3.4 25.8 29.611 0.2 4.0 25.6 29.812 4.8 25.4 30.213 8.0 22.0 30.014 0.4 13.0 16.6 30.015 0.4 13.4 15.4 29.216 0.8 14.0 14.4 29.217 0.4 16.4 12.6 29.418 0.2 1.0 16.4 12.2 29.819 2.0 16.0 11.8 29.820 1.6 16.0 11.8 29.421 2.0 15.8 12.0 29.822 0.4 1.6 15.8 11.6 29.423 0.4 1.8 16.4 11.0 29.6

TOTAL 1.4 1.2 24.4 277.4 408.6 713.0

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10

CLIMATOLOGICAL SUMMARY

MODEL – A Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times.

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 2.0 0.4 9.4 17.8 1.4 31.001 1.8 0.6 9.2 18.4 0.8 30.802 0.2 3.6 8.8 17.0 0.6 30.203 0.6 4.8 5.6 18.4 1.6 31.004 0.2 2.0 3.6 21.0 4.2 31.005 0.2 1.2 2.6 17.4 9.6 31.006 0.8 1.4 14.0 15.0 31.207 0.2 0.8 11.2 18.0 30.208 0.6 8.8 21.2 30.609 0.2 0.2 7.4 23.4 31.210 0.2 0.4 6.4 24.0 31.011 0.4 7.4 23.4 31.212 0.6 12.0 18.2 30.813 1.4 20.2 9.2 30.814 4.0 22.6 4.4 31.015 9.6 18.8 2.8 31.216 0.2 12.2 16.2 2.4 31.017 1.4 13.8 14.2 1.8 31.218 1.4 0.2 15.4 12.4 1.6 31.019 1.2 0.2 15.0 12.8 1.6 30.820 1.8 0.2 13.6 13.0 1.8 30.421 1.4 0.2 12.6 14.6 1.8 30.622 1.8 0.2 11.4 16.0 1.6 31.023 1.8 0.4 11.2 16.4 1.2 31.0

TOTAL 16.0 15.4 163.8 354.4 191.6 741.2

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11

CLIMATOLOGICAL SUMMARY

MODEL – A

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times.

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.4 3.4 1.2 14.4 10.2 0.2 29.801 3.6 1.6 13.0 11.4 29.602 0.2 1.8 6.4 11.6 9.6 0.2 29.803 0.2 0.2 9.6 7.2 11.6 1.2 30.004 0.2 0.2 6.2 4.2 17.4 1.8 30.005 0.2 3.4 4.4 17.4 4.6 30.006 1.6 3.4 16.0 9.0 30.007 1.0 0.8 15.2 13.0 30.008 0.4 10.8 18.8 30.009 0.4 7.8 21.8 30.010 0.6 6.4 23.0 30.011 0.6 0.8 7.2 21.0 29.612 2.0 14.8 13.0 29.813 0.4 3.6 22.4 3.4 29.814 0.4 8.4 20.0 1.0 29.815 0.8 0.4 14.6 13.6 0.2 29.616 2.0 0.4 18.4 9.0 29.817 3.4 0.4 18.0 8.0 0.2 30.018 4.2 1.0 17.2 7.2 0.2 29.819 0.2 5.2 0.8 15.6 7.8 0.2 29.820 0.2 5.2 0.8 15.4 8.2 0.2 30.021 4.6 1.2 15.4 8.8 30.022 0.2 4.8 1.0 14.8 9.2 30.023 0.2 4.6 1.2 13.4 10.2 0.2 29.8

TOTAL 0.2 1.6 45.0 38.8 218.0 280.2 133.2 717.0

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12

CLIMATOLOGICAL SUMMARY

MODEL – A

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of runway visual range/visibility (both in metres) and/or the height of the base of the lowest cloud layer (in metres), covering

more than 4/8th of the sky, below specified values at specified times.

RVR OR VIS / HS VIS / HS TIME (UTC)

<100 -

<200 -

<400 <30

<800 <60

<1500 <90

<1500 <150

<3000 <300

<8000 <600

TOTAL

00 0.8 3.6 6.8 5.6 10.0 3.4 30.201 0.8 3.8 8.0 4.8 9.2 3.8 30.402 1.0 0.2 4.4 3.2 10.0 8.2 3.4 30.403 0.6 0.4 4.0 3.2 12.6 5.8 4.2 30.804 0.2 0.6 3.4 1.2 12.0 5.0 7.2 0.6 30.205 0.2 0.4 2.4 1.0 10.0 4.0 10.8 1.8 30.606 0.4 0.6 1.2 7.0 4.4 13.0 4.0 30.607 0.2 0.2 0.6 5.2 3.8 13.8 6.8 30.608 0.4 4.0 2.8 13.8 9.6 30.609 0.2 3.2 2.0 12.8 12.4 30.610 0.4 2.8 2.2 12.0 13.4 30.811 0.2 3.0 3.0 12.6 11.8 30.612 1.0 1.4 5.6 16.0 6.6 30.613 2.8 1.4 7.6 17.8 1.2 30.814 0.4 2.2 3.6 11.2 13.0 0.2 30.615 0.8 3.8 3.4 15.4 7.2 0.2 30.816 1.8 6.0 3.0 14.8 5.4 0.2 31.217 2.2 7.4 3.2 13.8 4.2 0.2 31.018 0.2 0.2 2.6 6.8 3.8 13.8 3.4 0.2 31.019 0.2 2.2 7.2 4.6 14.0 2.6 30.820 0.2 3.2 7.0 5.2 12.0 3.2 30.821 0.2 0.4 3.6 8.0 4.2 11.4 3.0 30.822 0.2 4.6 8.0 5.0 10.2 2.8 30.823 0.4 0.2 4.2 7.0 5.8 10.4 2.8 30.8

TOTAL 4.4 3.8 48.0 93.4 124.8 200.6 192.2 69.2 736.4

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Fig. 1 (a) Number of days of weather parameters

Fig. 1(b) Relative Humidity (percentage)

Fig. 1(c) Average Monthly Rainfall (mm)

Rain 2 2.4 2.4 1.8 2.5 5.6 14 14 7 2 0.7 1.2

Thunder 1.3 1.8 2.8 2.9 5.5 5.5 8.8 7.3 3.7 1.4 0.5 0.7

Dust Storm 0 0.2 0.4 1.5 3.5 3.4 0.8 0 0 0.2 0 0.3

Hail 0.1 0 0.2 0.3 0 0 0.1 0 0 0 0 0.1

Fog 3 1.2 0.2 0 0.1 0 0.1 0 0.1 0.2 0.4 3.3

Squall 0 0 0.4 0.5 0.9 1.4 0.5 0.4 0.2 0.4 0 0

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

20

40

60

80

100

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

%

morning (0300 UTC) afternoon (1200 UTC)

14.8 14.1 9.3 6.118.9

54.2

241.1

284.3

119.4

16.86.4 8.6

0

50

100

150

200

250

300

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

mili

met

ers

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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MO

DE

L-

B

AERONAUTICALCLIMATOLOGICAL

SUMMARIES

JANUARY FEBRUARY MARCH

APRIL MAY JUNE

JULY AUGUST SEPTEMBER

OCTOBER NOVEMBER DECEMBER

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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13

CLIMATOLOGICAL SUMMARY

MODEL – B

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 6.8 2.2 2.4 4.0 5.8 2.8 0.6 24.601 7.4 2.8 2.4 3.2 5.6 2.8 0.6 24.802 9.4 2.0 2.6 2.0 6.4 2.6 0.2 25.203 8.8 1.4 1.2 2.8 7.4 3.4 0.2 25.204 6.8 1.2 1.6 1.6 7.0 6.4 0.6 25.205 3.6 1.0 2.0 2.4 5.0 9.4 1.8 0.2 25.406 1.2 0.4 0.6 3.0 5.8 10.2 3.4 0.2 24.807 0.2 0.2 0.8 1.2 6.2 10.2 5.4 1.2 25.408 0.4 0.4 0.4 4.4 10.6 7.2 2.0 25.409 0.2 0.4 0.6 2.2 11.8 8.0 2.2 25.410 0.4 0.6 2.4 12.0 7.6 2.0 25.011 0.2 0.2 2.6 12.4 8.2 1.6 25.212 0.4 0.8 3.0 13.4 7.0 0.8 25.413 1.2 0.6 6.2 14.8 2.2 25.014 0.2 0.6 0.6 1.2 9.8 11.6 1.2 25.215 0.4 0.6 1.8 2.4 12.2 7.6 0.2 0.2 25.416 0.6 1.2 2.8 3.6 11.4 5.6 0.2 25.417 1.6 2.2 1.6 5.6 9.6 4.6 0.2 25.418 2.2 2.4 2.8 5.0 9.0 3.6 0.4 25.419 3.8 2.0 3.6 3.6 8.0 3.6 0.6 25.220 4.4 1.6 3.6 3.0 7.4 4.2 0.6 24.821 5.4 1.6 3.2 2.6 7.4 4.0 0.8 25.022 6.2 2.2 2.8 3.2 6.2 3.4 1.0 25.023 6.2 2.4 1.8 4.2 6.6 2.8 0.8 24.8

TOTAL 75.2 28.6 41.2 57.8 157.6 173.8 59.0 10.4 603.6

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14

CLIMATOLOGICAL SUMMARY

MODEL – B Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 2.8 3.2 1.8 2.8 9.6 5.8 1.0 27.001 3.4 2.6 2.8 3.0 9.2 5.2 0.6 26.802 3.6 2.6 2.8 3.0 9.6 4.6 0.2 0.2 26.603 2.6 1.8 2.2 4.0 10.2 5.8 26.604 0.6 1.4 1.2 2.2 10.2 9.6 1.6 26.805 0.2 0.4 1.0 0.6 6.4 13.4 4.6 26.606 0.2 0.6 2.0 15.0 8.2 1.2 27.207 0.2 1.6 10.2 11.6 3.0 26.608 0.2 0.8 5.2 13.2 6.8 26.209 0.2 0.8 3.8 12.4 9.6 26.810 0.4 0.2 4.0 10.8 10.6 26.011 0.4 4.4 11.2 9.6 25.612 0.2 4.8 13.8 7.4 26.213 1.4 7.6 15.4 2.4 26.814 2.2 15.6 8.8 26.615 0.2 0.2 6.0 16.8 3.8 27.016 0.2 0.6 8.0 15.8 2.4 27.017 0.2 1.2 9.6 14.0 2.0 27.018 0.2 0.6 2.4 9.0 13.2 1.6 0.2 27.219 0.2 1.0 1.0 2.0 9.4 11.4 2.0 0.2 27.220 0.6 0.6 1.4 2.0 10.4 10.4 1.4 0.2 27.021 1.4 0.4 2.0 2.4 10.0 9.8 1.0 27.022 1.4 1.0 3.2 1.8 10.0 8.8 1.0 27.223 1.8 2.8 2.6 1.6 10.0 6.8 1.4 27.0

TOTAL 19.0 18.0 23.6 30.8 147.2 222.0 130.0 51.4 642.0

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15

CLIMATOLOGICAL SUMMARY

MODEL – B Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 0.6 0.2 1.4 1.4 6.6 15.0 3.4 28.601 0.6 0.4 0.8 2.6 7.8 14.2 2.0 28.402 0.6 0.6 1.0 3.0 10.4 11.4 1.6 28.603 0.4 0.4 0.6 2.2 8.6 14.4 2.4 29.004 0.2 0.8 5.8 16.0 6.2 29.005 0.2 0.8 14.6 12.8 0.4 28.806 0.2 9.0 16.4 2.8 28.407 0.2 3.0 18.4 7.0 28.608 2.2 12.0 14.8 29.009 1.6 8.2 18.4 28.210 1.2 7.6 18.2 27.011 0.2 0.2 1.4 7.0 17.8 26.612 0.2 0.2 1.2 10.4 15.6 27.613 3.0 18.6 7.2 28.814 0.2 10.0 18.6 0.2 29.015 0.4 18.2 10.4 29.016 0.8 21.4 6.4 28.617 1.8 21.0 6.0 28.818 4.0 20.6 4.4 29.019 0.2 0.2 5.4 18.8 4.4 29.020 0.2 0.2 6.0 18.0 4.2 28.621 0.2 0.4 8.2 15.6 4.2 0.2 28.822 0.4 0.2 0.8 8.4 14.4 4.0 0.2 28.423 0.4 0.2 0.2 2.0 6.8 15.4 3.4 0.2 28.6

TOTAL 3.2 2.0 5.4 13.6 82.6 281.6 193.0 103.0 684.4

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16

CLIMATOLOGICAL SUMMARY

MODEL – B

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 0.2 5.2 18.8 5.2 29.401 0.2 5.8 20.0 4.0 30.002 0.2 4.8 20.8 3.8 0.2 29.803 3.4 20.0 6.2 0.4 30.004 1.4 16.0 11.8 0.8 30.005 0.2 10.6 17.8 1.4 30.006 0.2 6.4 17.2 5.8 29.607 4.2 15.0 9.6 28.808 3.2 11.2 12.6 27.009 0.2 3.2 7.2 13.6 24.210 3.4 6.2 14.4 24.011 3.6 6.2 14.2 24.012 4.0 7.6 16.2 27.813 0.2 4.6 14.0 10.8 29.614 0.2 0.4 9.6 18.8 0.8 29.815 0.8 18.8 10.2 29.816 1.2 22.8 5.8 29.817 0.2 1.8 23.8 4.0 29.818 2.4 23.6 4.0 30.019 3.0 22.6 4.4 30.020 3.2 21.8 5.0 30.021 3.6 20.6 5.8 30.022 4.2 19.4 5.8 29.423 4.8 18.8 6.2 29.8

TOTAL 0.2 0.4 0.6 46.6 340.6 203.4 100.8 692.6

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17

CLIMATOLOGICAL SUMMARY

MODEL – B Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 0.2 2.6 19.6 8.2 0.2 30.801 0.4 3.0 18.8 7.8 0.4 30.402 0.2 0.4 3.0 16.2 10.2 0.6 30.603 0.2 0.2 2.4 13.2 13.4 1.2 30.604 1.4 13.0 14.4 2.2 31.005 0.2 0.4 10.4 15.2 4.8 31.006 0.2 0.4 9.4 13.8 7.0 30.807 9.6 12.2 8.2 30.008 0.2 8.6 10.6 10.0 29.409 0.2 0.2 9.0 10.0 10.6 30.010 0.4 8.6 10.0 10.8 29.811 0.4 9.6 9.0 10.6 29.612 0.8 9.4 10.8 8.8 29.813 0.2 1.0 10.6 12.0 6.4 30.214 1.4 13.2 14.2 1.8 30.615 0.2 1.0 19.6 10.0 0.2 31.016 0.2 2.0 21.2 7.6 31.017 3.0 20.6 7.0 30.618 2.8 21.6 6.4 30.819 2.8 21.2 6.6 0.2 30.820 3.0 20.6 7.0 0.4 31.021 2.8 19.8 8.0 0.4 31.022 2.8 19.0 8.6 30.423 0.2 1.8 19.0 9.0 30.0

TOTAL 0.2 0.4 0.4 2.0 39.6 361.8 242.0 84.8 731.2

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18

CLIMATOLOGICAL SUMMARY

MODEL – B Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in mertes) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 2.2 17.0 9.2 28.401 0.2 2.6 16.6 9.2 28.602 2.8 16.8 8.8 0.2 28.603 0.2 1.8 14.6 11.4 0.4 28.404 0.2 0.6 12.2 14.6 0.6 28.205 0.6 9.0 16.8 2.0 28.406 0.6 7.8 15.8 3.8 28.007 0.2 0.2 7.4 15.2 5.2 28.208 0.2 0.8 6.0 14.4 6.4 27.809 0.2 7.0 13.4 6.4 27.010 0.2 0.4 5.8 13.8 7.2 27.411 0.8 5.4 15.0 6.4 27.612 0.8 6.0 14.8 6.6 28.213 0.6 6.6 16.4 5.0 28.614 0.8 8.2 16.8 2.4 28.215 0.2 0.6 11.2 16.0 28.016 0.6 13.0 14.4 28.017 0.6 15.2 12.4 28.218 0.6 15.0 13.0 28.619 0.6 15.6 12.0 28.220 0.6 15.4 11.8 27.821 0.2 0.8 14.4 12.8 28.222 0.2 1.0 15.6 11.2 28.023 0.2 1.2 15.6 10.8 27.8

TOTAL 0.2 0.2 0.8 0.8 22.4 277.4 320.0 52.6 674.4

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19

CLIMATOLOGICAL SUMMARY

MODEL – B Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 0.2 1.2 15.2 14.4 31.001 2.0 14.8 13.6 30.402 2.2 14.0 14.0 0.4 30.603 0.2 0.8 14.2 14.6 1.2 31.004 0.2 11.6 17.0 2.0 30.805 0.2 0.2 8.6 17.6 4.0 30.606 0.4 7.6 16.2 6.4 30.607 0.2 7.0 16.8 6.2 30.208 0.4 5.6 16.8 7.4 30.209 0.2 6.0 14.4 9.4 30.010 0.2 0.4 6.6 15.0 8.2 30.411 7.8 14.6 8.2 30.612 0.2 8.2 15.6 6.4 30.413 0.2 8.8 16.8 4.8 30.614 0.2 10.4 18.0 2.2 30.815 12.6 17.2 0.6 30.416 0.2 14.6 16.0 0.2 31.017 15.8 14.8 0.2 30.818 17.0 13.8 0.2 31.019 15.4 15.4 30.820 0.2 16.2 14.4 0.2 31.021 0.4 15.2 14.8 0.2 30.622 1.0 14.6 15.0 0.2 30.823 1.6 14.0 15.4 31.0

TOTAL 0.4 0.8 11.8 281.8 372.2 68.6 735.6

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20

CLIMATOLOGICAL SUMMARY

MODEL – B

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 1.2 12.0 12.4 25.601 1.2 12.4 11.4 0.2 25.202 0.2 1.2 10.2 12.8 0.8 25.203 0.8 10.0 14.2 0.8 25.804 0.4 8.4 14.4 2.4 25.605 0.4 6.4 14.4 4.4 25.606 0.4 5.4 13.0 6.6 25.407 0.2 4.8 10.8 9.4 25.208 0.4 3.0 10.2 11.6 25.209 0.2 0.4 3.6 10.0 11.6 25.810 0.8 4.0 9.6 11.6 26.011 0.2 0.6 4.0 10.8 10.4 26.012 0.2 4.4 12.2 9.0 25.813 0.2 5.8 16.6 3.4 26.014 0.8 8.2 16.0 1.0 26.015 0.2 0.4 9.8 15.6 26.016 0.8 10.6 14.6 26.017 0.2 0.4 11.4 14.0 26.018 0.2 0.6 12.0 13.0 25.819 0.6 12.6 12.4 25.620 0.4 12.8 12.8 26.021 0.6 11.4 13.6 25.622 1.0 11.2 13.4 25.623 0.8 11.6 13.4 25.8

TOTAL 0.2 0.2 0.8 14.8 206.0 311.6 83.2 616.8

M O

D E

L - B

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21

CLIMATOLOGICAL SUMMARY

MODEL – B

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 0.2 1.8 17.6 10.2 29.801 0.4 1.8 18.0 9.2 29.402 3.4 15.4 10.8 29.603 1.8 14.6 13.2 29.604 1.0 11.6 15.6 1.4 29.605 0.8 8.6 16.0 4.4 29.806 0.4 5.8 17.6 5.8 29.607 0.6 4.0 15.2 9.8 29.608 0.2 0.6 4.2 13.0 11.6 29.609 0.6 4.0 12.6 12.0 29.210 0.4 3.4 13.6 11.8 29.211 0.2 4.0 14.2 11.0 29.412 4.8 16.2 8.8 29.813 8.0 19.4 2.4 29.814 0.4 13.0 16.2 0.2 29.815 0.4 13.4 15.2 29.016 0.8 14.0 14.2 29.017 0.4 16.4 12.4 29.218 1.0 16.6 12.0 29.619 2.0 16.0 11.8 29.820 1.6 16.0 11.8 29.421 2.0 15.8 12.0 29.822 0.4 1.6 15.8 11.6 29.423 0.2 0.2 1.8 16.4 11.0 29.6

TOTAL 0.2 0.2 1.2 25.4 277.4 325.0 79.2 708.6

M O

D E

L - B

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22

CLIMATOLOGICAL SUMMARY

MODEL – B Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 2.0 9.6 18.0 1.4 31.001 0.2 2.0 9.4 18.4 0.8 30.802 0.8 11.6 17.0 0.8 30.203 0.6 1.2 9.0 18.6 1.6 31.004 0.6 5.0 21.0 4.0 0.2 30.805 0.4 3.4 17.6 9.4 0.2 31.006 2.2 13.8 14.4 0.6 31.007 1.0 11.0 16.4 1.6 30.008 0.6 8.6 18.4 2.8 30.409 0.4 7.2 17.4 6.0 31.010 0.6 6.2 16.4 7.6 30.811 0.4 7.2 17.2 6.0 30.812 0.6 12.0 15.8 2.4 30.813 1.4 20.2 9.0 0.2 30.814 4.0 22.6 4.2 0.2 31.015 9.6 18.8 2.6 31.016 0.2 12.2 16.2 2.2 30.817 0.2 1.2 13.8 14.2 1.6 31.018 0.2 1.4 15.4 12.4 1.6 31.019 0.2 1.2 15.0 12.8 1.6 30.820 1.6 13.8 13.2 1.8 30.421 1.4 12.8 14.6 1.8 30.622 1.8 11.6 16.0 1.6 31.023 1.8 11.4 16.6 1.2 31.0

TOTAL 1.4 17.6 174.8 354.2 163.2 27.8 739.0

M O

D E

L - B

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23

CLIMATOLOGICAL SUMMARY

MODEL – B

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 0.4 0.2 1.0 3.4 14.4 10.2 0.2 29.801 0.2 0.4 1.2 3.4 13.0 11.4 29.602 0.2 0.4 1.4 2.8 15.2 9.6 0.2 29.803 0.2 0.2 0.8 2.2 13.6 11.6 1.2 29.804 0.4 0.6 0.8 8.8 17.6 1.8 30.005 0.4 0.6 7.0 17.4 4.6 30.006 0.4 4.4 16.2 9.0 30.007 1.8 15.2 12.0 1.0 30.008 0.4 10.8 15.0 3.8 30.009 0.4 7.8 16.2 5.6 30.010 0.6 6.4 16.4 6.6 30.011 1.2 7.4 16.6 4.4 29.612 2.0 14.8 12.6 0.4 29.813 0.4 3.6 22.4 3.4 29.814 0.2 0.2 8.4 20.0 1.0 29.815 0.2 0.2 0.8 14.6 13.6 0.2 29.616 0.2 0.6 1.6 18.4 9.0 29.817 0.2 1.0 2.6 18.0 8.0 0.2 30.018 0.2 1.2 3.6 17.4 7.2 0.2 29.819 0.2 1.2 4.6 15.8 7.8 0.2 29.820 0.4 0.8 4.8 15.6 8.2 0.2 30.021 0.2 0.4 0.8 4.2 15.6 8.8 30.022 0.2 0.4 1.4 4.0 14.8 9.2 30.023 0.2 0.4 2.0 3.4 13.4 10.2 0.2 29.8

TOTAL 1.6 4.2 14.8 43.8 238.4 280.8 111.4 21.8 716.8

M O

D E

L - B

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24

CLIMATOLOGICAL SUMMARY

MODEL – B

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of visibility below specified values (in metres) at the specified times.

VISIBILITY TIME (UTC)

<200

<400

<600

<800

<1500

<3000

<5000

<8000

TOTAL

00 5.2 1.8 4.2 5.4 10.0 3.4 0.2 30.201 5.6 1.8 4.2 5.8 9.2 3.8 30.402 5.6 3.0 3.8 5.4 9.2 3.4 30.403 4.6 2.6 4.4 6.2 8.8 4.2 30.804 4.2 0.4 2.2 4.8 10.8 7.2 0.6 30.205 3.6 0.4 3.4 10.6 10.8 1.8 30.606 0.8 1.4 0.4 1.4 9.6 13.0 4.0 30.607 0.6 0.8 1.4 7.0 14.0 6.8 30.608 0.4 0.4 0.2 6.0 14.0 9.4 0.2 30.609 0.2 1.0 4.2 12.8 11.6 0.8 30.610 0.2 0.4 4.4 12.2 11.6 1.8 30.611 1.0 5.2 12.6 10.6 1.2 30.612 0.4 1.4 6.2 15.8 6.6 30.413 0.4 1.4 2.4 7.6 17.8 1.2 30.814 0.6 1.4 2.2 1.6 11.6 13.0 0.2 30.615 1.4 1.6 2.4 2.4 15.6 7.2 0.2 30.816 2.2 1.4 2.8 4.4 14.8 5.2 0.2 31.017 2.4 2.6 2.2 5.6 13.8 4.2 0.2 31.018 3.6 1.8 2.8 5.2 14.0 3.4 0.2 31.019 4.0 1.8 3.2 5.2 14.0 2.6 30.820 4.4 2.4 3.6 5.0 12.2 3.2 30.821 4.8 1.8 3.2 6.6 11.4 3.0 30.822 5.0 1.6 5.2 6.0 10.2 2.8 30.823 5.2 1.8 5.0 5.6 10.4 2.8 30.8

TOTAL 63.8 30.2 55.4 87.8 236.8 192.4 65.4 4.0 735.8

M O

D E

L - B

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20%

40%

60%

80%

100%

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

upto 1 km 1-4 km 4-10 km 10-20 km over 20 km

20%

40%

60%

80%

100%

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

upto 1 km 1-4 km 4-10 km 10-20 km over 20 km

Fig. 2 (a) Visibility – Morning (0300 UTC)

Fig. 2 (b) Visibility – Afternoon (1200 UTC)

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MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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MO

DE

L-

C

AERONAUTICALCLIMATOLOGICAL

SUMMARIES

JANUARY FEBRUARY MARCH

APRIL MAY JUNE

JULY AUGUST SEPTEMBER

OCTOBER NOVEMBER DECEMBER

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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25

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 0.2 0.2 01 0.2 0.2 02 0.2 0.2 03 0.2 0.2 04 05 06 0.2 0.2 0.4 07 0.2 0.2 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 0.2 0.2

TOTAL 0.4 1.2 1.6

M O

D E

L - C

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26

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 0.2 0.2 01 0.2 0.2 02 0.2 0.2 03 0.2 0.2 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 0.2 0.2 22 23 0.2 0.2

TOTAL 0.6 0.6 1.2

M O

D E

L - C

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27

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

TOTAL

M O

D E

L - C

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28

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

TOTAL

M O

D E

L - C

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29

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

TOTAL

M O

D E

L - C

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30

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

TOTAL

M O

D E

L - C

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31

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 0.2 0.2 05 0.2 0.2 06 07 08 09 10 11 12 0.2 0.2 13 14 15 16 17 18 19 20 21 22 23

TOTAL 0.6 0.6

M O

D E

L - C

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32

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 0.2 0.2 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 0.2 0.2 20 21 22 23

TOTAL 0.2 0.2 0.4

M O

D E

L - C

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33

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 0.2 0.2 05 0.2 0.2 06 0.2 0.2 07 08 0.2 0.2 09 10 0.2 0.2 11 0.2 0.2 12 0.2 0.2 13 0.2 0.2 14 0.2 0.2 15 0.2 0.2 16 0.2 0.2 17 0.2 0.2 18 0.2 0.2 19 20 21 22 23

TOTAL 0.2 2.4 2.6

M O

D E

L - C

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34

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 05 06 0.2 0.2 07 0.2 0.2 08 0.2 0.2 09 0.2 0.2 10 0.2 0.2 11 0.2 0.2 0.4 12 13 14 15 0.2 0.2 16 0.2 0.2 17 0.2 0.2 18 19 20 21 22 23

TOTAL 1.2 0.8 2.0

M O

D E

L - C

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35

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

TOTAL

M O

D E

L - C

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36

CLIMATOLOGICAL SUMMARY

MODEL – C

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of height of the base (in metres) of the lowest cloud layer covering more than 4/8th of the sky below specified values at the specified times.

HS TIME (UTC)

<30

<60

<90

<150

<300

<450

TOTAL

00 01 02 03 04 05 06 07 08 09 10 0.2 0.2 11 12 0.2 0.2 13 14 15 16 0.2 0.2 17 18 19 20 21 22 23

TOTAL 0.6 0.6

M O

D E

L - C

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20%

40%

60%

80%

100%

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

<300 meters 300-600 600-900 900-1500

1500-1950 1950-2400 >2400 meters

20%

40%

60%

80%

100%

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

clear sky 1-2 okta 3-5 okta 6-7 okta overcast

20%

40%

60%

80%

100%

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

clear sky 1-2 okta 3-5 okta 6-7 okta overcast

Fig. 3 (a) Cloud Amount – Morning (0300 UTC)

Fig. 3 (b) Low Cloud Amount – Morning (0300 UTC)

Fig. 3 (c) Height of Low Cloud – Morning (0300 UTC)

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20%

40%

60%

80%

100%

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

<300 meters 300-600 600-900 900-1500

1500-1950 1950-2400 >2400 meters

20%

40%

60%

80%

100%

1 2 3 4 5 6 7 8 9 10 11 12

clear sky 1-2 okta 3-5 okta 6-7 okta overcast

20%

40%

60%

80%

100%

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

clear sky 1-2 okta 3-5 okta 6-7 okta overcast

Fig. 4 (a) Cloud Amount – Afternoon (1200 UTC)

Fig. 4 (b) Low Cloud Amount – Afternoon (1200 UTC)

Fig. 4 (c) Height of Low Cloud – Afternoon (1200 UTC)

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MO

DE

L-

D

AERONAUTICALCLIMATOLOGICAL

SUMMARIES

JANUARY FEBRUARY MARCH

APRIL MAY JUNE

JULY AUGUST SEPTEMBER

OCTOBER NOVEMBER DECEMBER

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

00 UTC 12 UTC

03 UTC 15 UTC

06 UTC 18 UTC

09 UTC 21 UTC

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37

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 13.0 13.0

Variable 35-36-01 0.2 0.2 02-03-04 0.2 0.2 05-06-07 0.6 0.6 08-09-10 1.4 0.6 2.0 11-12-13 0.4 0.2 0.2 0.8 14-15-16 17-18-19 20-21-22 23-24-25 1.8 1.8 26-27-28 3.0 0.8 0.2 4.0 29-30-31 0.8 0.6 1.4 32-33-34 0.4 0.2 0.6

TOTAL 13.0 8.8 2.4 0.4 24.6

M O

D E

L - D

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38

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 8.4 8.4

Variable 35-36-01 0.2 0.2 02-03-04 05-06-07 0.6 0.6 08-09-10 0.8 0.4 1.2 11-12-13 1.0 1.0 2.0 14-15-16 0.4 0.4 17-18-19 0.2 0.2 20-21-22 0.6 0.2 0.8 23-24-25 3.0 0.6 3.6 26-27-28 3.0 2.4 5.4 29-30-31 1.4 1.0 2.4 32-33-34

TOTAL 8.4 11.2 5.4 0.2 25.2

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39

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 2.4 2.4

Variable 35-36-01 0.4 0.402-03-04 0.2 0.2 0.405-06-07 0.2 0.208-09-10 0.6 0.6 1.211-12-13 0.6 1.0 0.4 2.014-15-16 0.4 0.8 1.217-18-19 0.4 0.4 0.820-21-22 0.4 0.423-24-25 1.4 0.4 1.826-27-28 3.6 3.0 6.629-30-31 2.4 3.0 1.0 6.432-33-34 0.2 0.8 1.0

TOTAL 2.4 10.8 10.2 1.4 24.8

M O

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40

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 0.6 0.6

Variable 35-36-01 0.4 0.2 0.602-03-04 0.2 0.2 0.405-06-07 08-09-10 0.6 0.6 1.211-12-13 1.0 0.4 0.2 1.614-15-16 0.2 0.4 0.2 0.817-18-19 1.0 0.2 1.220-21-22 0.4 0.423-24-25 0.2 0.4 0.626-27-28 2.0 2.8 0.2 5.029-30-31 3.0 4.8 1.4 0.2 9.432-33-34 1.8 1.8 3.6

TOTAL 0.6 10.8 11.6 2.2 0.2 25.4

M O

D E

L - D

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41

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 2.6 2.6

Variable 35-36-01 0.4 0.4 02-03-04 0.6 0.6 05-06-07 0.4 0.4 08-09-10 1.8 0.4 2.2 11-12-13 0.4 0.4 0.8 14-15-16 0.4 0.4 17-18-19 20-21-22 23-24-25 0.8 0.8 26-27-28 3.0 1.0 0.2 4.2 29-30-31 5.8 4.6 0.6 11.0 32-33-34 1.4 0.6 2.0

TOTAL 2.6 15.0 7.0 0.8 25.4

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42

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 12.4 12.4

Variable 35-36-01 0.6 0.602-03-04 0.6 0.605-06-07 08-09-10 1.6 0.4 2.011-12-13 0.4 0.4 0.2 1.014-15-16 0.4 0.417-18-19 0.4 0.420-21-22 23-24-25 0.8 0.826-27-28 2.4 0.6 3.029-30-31 2.0 0.4 2.432-33-34 1.2 0.6 1.8

TOTAL 12.4 10.4 2.4 0.2 25.4

M O

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43

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 15.4 15.4

Variable 35-36-01 0.2 0.2 0.4 02-03-04 0.4 0.4 05-06-07 0.4 0.4 08-09-10 1.8 0.4 2.2 11-12-13 0.8 0.6 0.2 1.6 14-15-16 17-18-19 20-21-22 23-24-25 1.4 1.4 26-27-28 1.0 0.4 1.4 29-30-31 0.8 0.6 1.4 32-33-34 0.4 0.4 0.8

TOTAL 15.4 7.2 2.6 0.2 25.4

M O

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44

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 16.0 16.0

Variable 35-36-01 0.2 0.2 02-03-04 05-06-07 0.2 0.4 0.6 08-09-10 1.8 1.8 11-12-13 0.2 0.8 1.0 14-15-16 0.2 0.2 17-18-19 20-21-22 0.2 0.2 23-24-25 1.4 1.4 26-27-28 1.0 0.6 1.6 29-30-31 1.2 0.6 1.8 32-33-34 0.2 0.2

TOTAL 16.0 6.4 2.6 25.0

M O

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45

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 14.6 14.6

Variable 35-36-01 0.2 0.202-03-04 0.2 0.205-06-07 0.4 0.2 0.608-09-10 1.4 0.4 0.2 2.011-12-13 0.2 0.2 0.2 0.614-15-16 0.2 0.217-18-19 20-21-22 1.0 1.023-24-25 3.2 0.2 3.426-27-28 2.2 0.6 2.829-30-31 0.8 0.2 1.032-33-34 0.2 0.2 0.4

TOTAL 14.6 10.0 2.0 0.4 27.0

M O

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46

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.6 6.6

Variable 35-36-01 0.2 0.2 02-03-04 0.2 0.2 0.4 05-06-07 0.2 0.2 08-09-10 0.8 0.2 1.0 11-12-13 1.4 0.6 0.2 2.2 14-15-16 0.4 0.4 17-18-19 20-21-22 0.8 0.8 23-24-25 6.6 0.8 7.4 26-27-28 4.6 1.6 0.2 6.4 29-30-31 0.8 0.8 32-33-34 0.2 0.2

TOTAL 6.6 16.2 3.4 0.4 26.6

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47

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 2.4 2.4

Variable 35-36-01 1.0 1.002-03-04 0.2 0.205-06-07 0.8 0.808-09-10 0.2 0.4 0.2 0.811-12-13 0.4 0.4 0.2 0.4 1.414-15-16 0.8 0.6 0.4 1.817-18-19 0.6 0.620-21-22 0.4 0.423-24-25 1.2 0.6 1.826-27-28 1.8 4.0 0.6 6.429-30-31 2.2 3.8 0.4 0.2 6.632-33-34 1.4 1.4 0.2 3.0

TOTAL 2.4 10.8 11.4 2.0 0.6 27.2

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48

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 0.6 0.6

Variable 35-36-01 0.2 0.202-03-04 0.2 0.2 0.405-06-07 0.2 0.2 0.408-09-10 0.2 0.2 0.2 0.611-12-13 0.8 0.4 0.2 0.2 1.614-15-16 0.4 0.6 1.017-18-19 0.2 0.2 0.420-21-22 0.2 0.2 0.423-24-25 0.6 0.6 1.226-27-28 1.0 3.4 0.8 0.4 5.629-30-31 2.2 6.2 1.6 0.4 10.432-33-34 1.2 2.4 0.6 4.2

TOTAL 0.6 7.2 14.2 3.6 1.4 27.0

M O

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49

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 1.2 1.2

Variable 35-36-01 0.4 0.2 0.602-03-04 1.0 0.2 0.2 1.405-06-07 0.2 0.208-09-10 0.2 0.8 0.4 1.411-12-13 0.4 0.2 0.2 0.2 1.014-15-16 0.2 0.217-18-19 20-21-22 0.2 0.223-24-25 0.4 0.2 0.2 0.826-27-28 2.2 3.0 0.4 5.629-30-31 2.6 5.8 0.8 9.232-33-34 1.6 3.2 0.2 5.0

TOTAL 1.2 9.4 13.6 2.2 0.4 26.8

M O

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50

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 11.2 11.2

Variable 35-36-01 0.6 0.2 0.802-03-04 0.8 0.2 1.005-06-07 0.6 0.2 0.808-09-10 1.0 0.4 1.411-12-13 0.6 0.2 0.2 1.014-15-16 17-18-19 0.2 0.220-21-22 23-24-25 1.2 1.226-27-28 2.4 0.8 3.229-30-31 4.0 0.2 4.232-33-34 1.6 0.2 0.2 2.0

TOTAL 11.2 13.0 2.4 0.2 0.2 27.0

M O

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51

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 14.0 14.0

Variable 35-36-01 0.2 0.202-03-04 1.2 0.2 1.405-06-07 1.2 1.208-09-10 1.0 0.8 1.811-12-13 0.6 0.4 0.2 1.214-15-16 0.2 0.217-18-19 0.2 0.220-21-22 23-24-25 0.6 0.626-27-28 1.2 0.6 1.829-30-31 2.2 2.232-33-34 1.6 0.8 2.4

TOTAL 14.0 10.2 2.8 0.2 27.2

M O

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52

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 15.4 15.4

Variable 35-36-01 0.4 0.402-03-04 0.2 0.205-06-07 0.6 0.608-09-10 0.8 1.0 0.2 0.2 2.211-12-13 0.6 0.2 0.814-15-16 0.2 0.217-18-19 0.2 0.220-21-22 0.2 0.223-24-25 1.8 1.826-27-28 1.6 0.6 2.229-30-31 1.4 0.6 2.032-33-34 0.8 0.8

TOTAL 15.4 8.8 2.2 0.4 0.2 27.0

M O

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53

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 13.4 13.4

Variable 35-36-01 0.2 0.202-03-04 0.2 0.205-06-07 0.6 0.2 0.2 1.008-09-10 0.6 1.4 0.2 2.211-12-13 0.6 0.2 0.814-15-16 0.4 0.2 0.617-18-19 0.2 0.220-21-22 0.4 0.423-24-25 3.2 0.2 3.426-27-28 4.0 0.4 4.429-30-31 1.2 0.2 1.432-33-34 0.4 0.4

TOTAL 13.4 12.0 2.8 0.4 28.6

M O

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54

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 4.8 4.8

Variable 35-36-01 02-03-04 0.2 0.2 05-06-07 0.2 0.2 0.4 08-09-10 0.6 1.0 0.2 1.8 11-12-13 1.0 1.4 2.4 14-15-16 17-18-19 1.2 1.2 20-21-22 0.4 0.4 23-24-25 5.4 1.6 7.0 26-27-28 5.6 3.0 8.6 29-30-31 1.0 1.0 2.0 32-33-34 0.2 0.2

TOTAL 4.8 15.6 8.2 0.4 29.0

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55

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 1.4 1.4

Variable 35-36-01 0.2 0.2 0.402-03-04 0.2 0.2 0.405-06-07 0.2 0.208-09-10 0.4 0.8 0.2 1.411-12-13 1.0 1.2 0.2 0.2 2.614-15-16 0.6 0.8 0.2 1.617-18-19 0.2 0.2 0.420-21-22 0.6 0.4 1.023-24-25 0.8 1.6 2.426-27-28 1.8 3.8 0.2 5.829-30-31 2.2 4.6 1.6 8.432-33-34 0.8 1.4 0.2 2.4

TOTAL 1.4 8.6 15.4 2.8 0.2 28.4

M O

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56

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 0.2 0.2

Variable 35-36-01 0.4 0.402-03-04 0.2 0.205-06-07 0.2 0.208-09-10 0.2 0.4 0.611-12-13 0.4 0.8 0.4 1.614-15-16 0.2 0.2 0.417-18-19 0.4 0.4 0.820-21-22 1.4 0.6 2.023-24-25 0.2 0.8 1.026-27-28 2.0 4.2 1.0 7.229-30-31 1.4 5.0 2.6 0.6 9.632-33-34 1.2 2.0 1.0 0.2 4.4

TOTAL 0.2 7.6 14.6 5.4 0.8 28.6

M O

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57

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 0.6 0.6

Variable 35-36-01 0.4 0.4 0.802-03-04 0.8 0.2 1.005-06-07 0.4 0.408-09-10 0.4 1.6 0.2 2.211-12-13 1.4 1.414-15-16 0.2 0.217-18-19 0.2 0.220-21-22 0.2 0.223-24-25 0.2 0.6 0.826-27-28 1.0 3.0 0.8 4.829-30-31 1.4 7.4 1.8 10.632-33-34 1.6 2.6 1.2 5.4

TOTAL 0.6 5.8 18.2 3.8 0.2 28.6

M O

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58

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 9.0 9.0

Variable 35-36-01 1.6 0.2 1.8 02-03-04 0.8 0.8 05-06-07 1.2 1.2 08-09-10 1.6 1.6 0.2 0.2 3.6 11-12-13 0.4 0.2 0.2 0.8 14-15-16 0.6 0.6 17-18-19 20-21-22 23-24-25 0.8 0.8 26-27-28 2.2 0.6 2.8 29-30-31 3.0 1.6 4.6 32-33-34 1.8 1.2 3.0

TOTAL 9.0 14.0 5.4 0.4 0.2 29.0

M O

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59

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 14.0 14.0

Variable 35-36-01 0.4 0.402-03-04 1.2 1.205-06-07 1.6 0.4 2.008-09-10 1.8 1.0 2.811-12-13 0.4 0.4 0.2 1.014-15-16 0.2 0.217-18-19 20-21-22 0.4 0.2 0.623-24-25 1.0 0.2 1.226-27-28 1.0 0.4 1.429-30-31 1.2 1.4 2.632-33-34 1.4 0.2 1.6

TOTAL 14.0 10.6 4.2 0.2 29.0

M O

D E

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60

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 12.4 12.4

Variable 35-36-01 1.0 1.002-03-04 0.2 0.4 0.605-06-07 0.8 0.4 1.208-09-10 1.4 1.2 2.611-12-13 1.0 0.6 1.614-15-16 0.2 0.217-18-19 20-21-22 1.0 1.023-24-25 1.8 1.826-27-28 2.0 0.8 2.829-30-31 1.8 0.6 2.432-33-34 0.8 0.4 1.2

TOTAL 12.4 12.0 4.4 28.8

M O

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61

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 15.0 15.0

Variable 35-36-01 0.2 0.202-03-04 0.2 0.2 0.405-06-07 0.4 0.408-09-10 0.8 1.2 0.2 2.211-12-13 1.6 1.2 2.814-15-16 0.2 0.217-18-19 0.6 0.620-21-22 1.6 0.2 1.823-24-25 2.2 0.4 2.626-27-28 1.6 0.4 2.029-30-31 0.8 0.832-33-34 0.4 0.2 0.6

TOTAL 15.0 9.8 4.2 0.4 0.2 29.6

M O

D E

L - D

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62

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 2.8 2.8

Variable 35-36-01 0.2 0.2 02-03-04 0.6 0.2 0.8 05-06-07 0.2 0.2 0.2 0.6 08-09-10 0.4 0.4 0.4 1.2 11-12-13 0.4 0.8 0.8 2.0 14-15-16 0.4 0.6 1.0 17-18-19 0.8 0.2 0.2 1.2 20-21-22 1.2 0.8 2.0 23-24-25 5.4 2.2 7.6 26-27-28 4.8 3.0 7.8 29-30-31 1.4 0.6 2.0 32-33-34 0.8 0.8

TOTAL 2.8 16.6 9.0 1.6 30.0

M O

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63

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26 to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 0.8 0.8

Variable 35-36-01 0.8 0.2 1.002-03-04 0.2 0.205-06-07 0.2 0.2 0.408-09-10 0.4 1.0 0.2 1.611-12-13 0.6 1.2 0.4 2.214-15-16 0.8 0.4 1.217-18-19 0.4 1.0 1.420-21-22 0.2 0.2 0.423-24-25 0.8 1.8 2.626-27-28 0.8 2.8 0.4 4.029-30-31 2.2 5.2 1.4 8.832-33-34 1.4 3.4 0.2 5.0

TOTAL 0.8 8.6 17.4 2.0 0.6 0.2 29.6

M O

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64

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21 to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 0.6 0.6

Variable 35-36-01 0.8 0.2 1.002-03-04 0.8 0.6 1.405-06-07 0.8 0.8 1.608-09-10 0.6 0.611-12-13 0.2 1.2 0.2 1.614-15-16 0.2 0.4 0.617-18-19 0.6 0.2 0.820-21-22 0.6 0.4 0.2 1.223-24-25 0.4 1.2 0.2 1.826-27-28 0.8 3.2 1.6 5.629-30-31 0.4 4.8 2.8 0.2 8.232-33-34 0.8 2.4 1.6 4.8

TOTAL 0.6 5.8 16.4 6.6 0.2 0.2 29.8

M O

D E

L - D

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65

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 1.6 1.6

Variable 35-36-01 0.6 0.8 0.4 1.802-03-04 1.0 0.2 1.205-06-07 0.4 0.6 1.008-09-10 1.0 0.8 0.2 2.011-12-13 0.6 0.4 0.2 0.2 1.414-15-16 17-18-19 20-21-22 0.2 0.223-24-25 0.6 0.626-27-28 0.8 2.0 0.6 3.429-30-31 1.0 6.4 2.4 9.832-33-34 1.0 4.6 0.8 6.4

TOTAL 1.6 6.4 16.4 4.8 0.2 29.4

M O

D E

L - D

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66

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16 to 20

21 to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 11.4 11.4

Variable 35-36-01 0.4 0.402-03-04 0.6 0.6 1.205-06-07 1.0 0.4 0.2 1.608-09-10 1.8 0.8 2.611-12-13 0.4 0.8 0.4 1.614-15-16 0.4 0.417-18-19 20-21-22 0.6 0.623-24-25 0.8 0.6 1.426-27-28 2.2 1.0 3.229-30-31 2.2 0.4 2.632-33-34 1.6 0.8 0.2 0.2 2.8

TOTAL 11.4 12.0 5.4 0.6 0.2 0.2 29.8

M O

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67

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 14.0 14.0

Variable 35-36-01 0.2 0.202-03-04 0.8 0.805-06-07 0.8 0.4 0.2 1.408-09-10 3.2 0.4 3.611-12-13 1.0 1.0 0.2 2.214-15-16 0.8 0.2 1.017-18-19 0.4 0.420-21-22 0.8 0.823-24-25 1.0 0.8 1.826-27-28 0.8 0.2 1.029-30-31 0.6 0.2 0.832-33-34 1.0 1.0 2.0

TOTAL 14.0 11.2 4.2 0.6 30.0

M O

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68

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 15.4 15.4

Variable 35-36-01 0.6 0.2 0.8 02-03-04 05-06-07 0.8 0.2 1.0 08-09-10 1.4 1.0 2.4 11-12-13 0.6 1.2 0.2 2.0 14-15-16 17-18-19 0.4 0.4 20-21-22 1.0 0.2 0.2 1.4 23-24-25 2.0 0.4 2.4 26-27-28 1.0 0.6 1.6 29-30-31 0.6 1.0 1.6 32-33-34 0.6 0.4 1.0

TOTAL 15.4 9.0 5.0 0.6 30.0

M O

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69

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 5.4 5.4

Variable 35-36-01 0.2 0.202-03-04 0.2 0.205-06-07 1.0 0.6 0.2 1.808-09-10 1.0 3.0 0.6 4.611-12-13 2.2 2.2 0.2 4.614-15-16 0.6 0.4 1.017-18-19 0.8 0.4 1.220-21-22 2.8 0.4 0.2 3.423-24-25 3.4 0.8 0.2 4.426-27-28 1.0 0.6 0.4 2.029-30-31 1.0 0.6 0.2 1.832-33-34 0.2 0.2 0.4

TOTAL 5.4 14.0 9.2 2.0 0.4 31.0

M O

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L - D

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70

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21 to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 1.4 1.4

Variable 35-36-01 02-03-04 0.2 0.205-06-07 0.8 0.2 0.2 1.208-09-10 0.4 2.0 1.0 0.4 3.811-12-13 1.2 2.6 1.4 5.214-15-16 0.4 0.8 0.4 1.617-18-19 0.8 0.4 1.220-21-22 1.6 0.6 0.2 2.423-24-25 1.2 2.6 1.8 0.4 6.026-27-28 1.0 2.2 1.4 0.2 4.829-30-31 0.8 1.2 0.2 0.2 2.432-33-34 0.2 0.2 0.4

TOTAL 1.4 8.4 12.6 6.8 1.2 0.2 30.6

M O

D E

L - D

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71

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21 to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 0.6 0.6

Variable 35-36-01 0.2 0.2 0.402-03-04 0.6 0.2 0.805-06-07 0.6 0.6 1.208-09-10 1.0 1.6 1.6 4.211-12-13 0.6 1.6 0.4 2.614-15-16 0.2 1.6 0.2 2.017-18-19 0.4 0.2 0.620-21-22 0.6 0.6 0.2 1.423-24-25 0.6 1.6 1.2 3.426-27-28 0.8 1.4 2.4 1.0 0.2 5.829-30-31 1.4 1.8 2.0 0.2 5.432-33-34 0.6 1.0 0.8 2.4

TOTAL 0.6 7.6 12.0 9.2 1.2 0.2 30.8

M O

D E

L - D

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72

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 0.6 0.6

Variable 35-36-01 0.4 0.6 1.002-03-04 0.4 0.4 0.805-06-07 0.6 1.4 0.2 2.208-09-10 0.6 2.6 0.4 3.611-12-13 0.4 0.6 1.014-15-16 0.4 0.6 1.017-18-19 0.2 0.2 0.2 0.620-21-22 0.6 0.2 0.2 1.023-24-25 0.8 1.2 1.0 0.2 3.226-27-28 0.8 2.8 1.8 5.429-30-31 0.6 2.2 2.8 0.4 6.032-33-34 0.8 2.2 1.6 4.6

TOTAL 0.6 6.6 15.0 8.0 0.8 31.0

M O

D E

L - D

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73

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 1.8 1.8

Variable 35-36-01 0.4 0.402-03-04 1.4 0.8 0.2 2.405-06-07 1.6 1.0 0.6 3.208-09-10 0.2 1.4 1.0 2.611-12-13 0.4 0.2 0.614-15-16 0.2 0.2 0.417-18-19 0.4 0.2 0.2 0.820-21-22 0.6 0.2 0.823-24-25 0.8 1.8 0.8 3.426-27-28 0.8 1.2 2.0 0.2 4.229-30-31 0.6 3.4 3.2 7.232-33-34 0.6 1.2 1.2 3.0

TOTAL 1.8 7.6 11.8 9.4 0.2 30.8

M O

D E

L - D

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74

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36 to 40

41to 45

46 to 50

>50

TOTAL

Calm 5.6 5.6

Variable 35-36-01 0.4 0.2 0.602-03-04 0.4 0.405-06-07 2.2 0.6 0.6 0.2 3.608-09-10 1.2 2.4 1.0 0.2 4.811-12-13 1.0 1.0 2.014-15-16 0.4 0.417-18-19 0.4 0.2 0.620-21-22 0.8 0.4 1.223-24-25 1.8 1.0 0.4 3.226-27-28 1.4 2.0 0.2 3.629-30-31 1.8 0.8 0.4 3.032-33-34 1.8 0.2 2.0

TOTAL 5.6 12.8 9.2 2.8 0.4 0.2 31.0

M O

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75

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.2 6.2

Variable 35-36-01 0.4 0.2 0.602-03-04 0.2 0.4 0.605-06-07 0.6 0.2 0.2 1.008-09-10 1.4 3.8 1.4 0.2 6.811-12-13 1.2 1.8 0.2 3.214-15-16 0.8 0.2 0.2 1.217-18-19 0.4 0.420-21-22 2.0 0.6 2.623-24-25 2.0 1.0 0.2 3.226-27-28 1.6 0.4 0.2 0.2 2.429-30-31 0.6 0.2 0.2 1.032-33-34 0.8 0.8 1.6

TOTAL 6.2 12.0 9.6 2.4 0.6 30.8

M O

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76

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 5.4 5.4

Variable 35-36-01 0.2 0.2 0.402-03-04 1.2 0.2 1.405-06-07 0.4 0.8 1.208-09-10 1.8 1.6 1.0 4.411-12-13 1.4 2.6 0.8 0.2 5.014-15-16 1.0 0.6 1.617-18-19 0.6 0.4 1.020-21-22 1.4 0.2 0.2 1.823-24-25 3.8 0.6 4.426-27-28 0.4 1.4 0.2 2.029-30-31 1.0 0.4 1.432-33-34 0.2 0.6 0.2 1.0

TOTAL 5.4 13.4 9.6 2.4 0.2 31.0

M O

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77

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.0 6.0

Variable 35-36-01 0.2 0.2 0.4 02-03-04 0.2 0.2 05-06-07 1.2 0.2 0.2 1.6 08-09-10 1.4 2.2 0.4 4.0 11-12-13 1.4 2.8 0.2 4.4 14-15-16 1.4 1.2 2.6 17-18-19 0.2 0.2 20-21-22 1.0 0.2 0.2 1.4 23-24-25 2.8 0.4 3.2 26-27-28 1.6 1.0 2.6 29-30-31 0.8 0.2 0.2 1.2 32-33-34 0.4 0.2 0.6

TOTAL 6.0 12.6 8.6 1.2 28.4

M O

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78

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 2.2 2.2

Variable 35-36-01 0.2 0.202-03-04 0.8 0.6 1.405-06-07 0.2 0.2 0.2 0.2 0.808-09-10 1.4 1.8 0.4 3.611-12-13 0.6 3.4 1.0 5.014-15-16 0.6 1.2 0.4 2.217-18-19 0.6 1.0 1.620-21-22 0.2 0.223-24-25 1.6 0.8 2.426-27-28 0.4 3.4 0.8 4.629-30-31 1.0 1.6 0.2 0.2 3.032-33-34 0.4 0.6 0.2 1.2

TOTAL 2.2 8.0 14.6 3.2 0.4 28.4

M O

D E

L - D

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79

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 1.2 1.2

Variable 35-36-01 0.6 0.6 0.2 1.402-03-04 0.6 1.2 0.2 2.005-06-07 1.4 0.2 0.2 1.808-09-10 1.2 1.0 0.4 2.611-12-13 1.0 1.6 0.8 3.414-15-16 0.4 0.8 1.217-18-19 1.0 0.4 1.420-21-22 0.2 0.223-24-25 0.4 0.2 0.2 0.826-27-28 0.4 1.8 0.4 2.629-30-31 1.0 3.4 1.0 0.2 5.632-33-34 1.8 1.8 0.2 3.8

TOTAL 1.2 10.0 13.0 3.6 0.2 28.0

M O

D E

L - D

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80

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 1.4 1.4

Variable 35-36-01 1.0 0.6 1.602-03-04 0.6 0.6 0.2 1.405-06-07 1.2 1.0 0.4 2.608-09-10 0.6 2.8 0.4 3.811-12-13 1.0 1.6 0.4 3.014-15-16 0.6 0.8 1.417-18-19 0.4 0.420-21-22 0.2 0.223-24-25 0.8 0.826-27-28 0.4 0.8 0.2 1.429-30-31 0.4 3.8 1.6 0.4 6.232-33-34 1.4 2.2 0.2 3.8

TOTAL 1.4 7.6 15.2 3.4 0.4 28.0

M O

D E

L - D

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81

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 2.0 2.0

Variable 35-36-01 1.2 0.4 1.602-03-04 1.0 0.8 0.2 2.005-06-07 2.2 0.4 0.2 0.2 3.008-09-10 1.2 2.6 3.811-12-13 1.0 2.0 0.4 3.414-15-16 0.6 0.8 1.417-18-19 0.4 0.4 0.4 1.220-21-22 0.4 0.2 0.623-24-25 0.6 0.2 0.2 1.026-27-28 0.4 1.2 1.629-30-31 0.6 2.6 1.4 4.632-33-34 0.6 1.6 0.2 2.4

TOTAL 2.0 10.2 13.2 2.8 0.4 28.6

M O

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82

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21 to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 5.6 5.6

Variable 35-36-01 0.2 0.202-03-04 0.4 0.2 0.605-06-07 2.6 0.2 2.808-09-10 1.6 2.6 0.2 4.411-12-13 2.2 2.4 0.6 5.214-15-16 0.8 0.6 0.4 1.817-18-19 0.4 0.2 0.620-21-22 0.6 0.2 0.823-24-25 0.4 0.6 1.026-27-28 0.4 0.2 0.2 0.829-30-31 2.4 0.6 3.032-33-34 1.0 0.2 1.2

TOTAL 5.6 12.6 8.2 1.4 0.2 28.0

M O

D E

L - D

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83

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.4 6.4

Variable 35-36-01 0.4 0.4 02-03-04 0.2 0.2 05-06-07 0.8 0.4 1.2 08-09-10 1.6 3.2 0.2 5.0 11-12-13 2.0 1.8 0.2 4.0 14-15-16 2.2 1.4 1.0 4.6 17-18-19 0.4 0.2 0.6 20-21-22 0.4 0.2 0.6 23-24-25 0.8 0.4 1.2 26-27-28 1.2 0.6 1.8 29-30-31 1.6 1.6 32-33-34 1.0 1.0

TOTAL 6.4 12.6 8.0 1.6 28.6

M O

D E

L - D

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84

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21 to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.4 6.4

Variable 35-36-01 02-03-04 0.4 0.2 0.605-06-07 0.2 0.208-09-10 2.8 1.6 0.2 4.611-12-13 2.0 1.6 1.6 5.214-15-16 1.2 1.2 0.4 2.817-18-19 1.0 0.8 1.820-21-22 1.6 1.623-24-25 1.6 0.2 1.826-27-28 1.2 0.4 0.2 1.829-30-31 0.4 0.2 0.4 1.032-33-34 0.4 0.4

TOTAL 6.4 12.8 6.0 2.8 0.2 28.2

M O

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L - D

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85

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.6 6.6

Variable 35-36-01 0.2 0.2 02-03-04 05-06-07 0.6 0.6 08-09-10 3.0 1.8 0.4 5.2 11-12-13 1.6 1.0 0.4 3.0 14-15-16 1.6 0.6 2.2 17-18-19 1.0 0.2 0.2 1.4 20-21-22 1.6 0.2 1.8 23-24-25 2.8 0.4 3.2 26-27-28 2.2 3.6 0.4 6.2 29-30-31 0.4 0.2 0.6 32-33-34

TOTAL 6.6 15.0 8.0 1.4 31.0

M O

D E

L - D

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86

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 2.6 2.6

Variable 35-36-01 0.2 0.202-03-04 0.2 0.2 0.405-06-07 1.0 0.8 1.808-09-10 0.8 2.0 2.811-12-13 1.4 1.8 1.4 4.614-15-16 0.4 1.0 0.4 1.817-18-19 0.4 0.4 0.820-21-22 0.2 0.4 0.623-24-25 1.2 2.2 3.426-27-28 1.0 3.2 3.6 0.6 8.429-30-31 1.6 0.6 0.6 0.2 3.032-33-34 0.2 0.2 0.2 0.6

TOTAL 2.6 8.4 13.0 6.2 0.8 31.0

M O

D E

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87

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 0.8 0.8

Variable 35-36-01 0.2 0.4 0.602-03-04 0.6 0.4 1.005-06-07 0.4 0.2 0.608-09-10 1.6 1.6 0.6 3.811-12-13 1.0 1.2 1.2 3.414-15-16 0.2 1.6 0.2 0.2 2.217-18-19 0.4 0.2 0.620-21-22 1.0 0.2 1.223-24-25 0.6 1.2 0.4 2.226-27-28 1.0 5.2 1.6 0.2 8.029-30-31 1.6 1.6 1.8 0.2 5.232-33-34 0.2 0.6 0.2 1.0

TOTAL 0.8 8.8 14.4 6.0 0.6 30.6

M O

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88

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 1.4 1.4

Variable 35-36-01 0.2 0.2 0.402-03-04 0.4 0.2 0.605-06-07 0.8 0.8 1.608-09-10 1.2 2.2 0.4 0.2 4.011-12-13 1.2 2.4 0.8 4.414-15-16 0.6 0.6 0.2 1.417-18-19 0.8 0.4 1.220-21-22 1.2 0.4 1.623-24-25 0.8 1.0 0.4 2.226-27-28 0.8 1.8 0.8 3.429-30-31 1.0 3.6 1.4 6.032-33-34 0.4 1.4 0.2 2.0

TOTAL 1.4 9.4 15.0 4.2 0.2 30.2

M O

D E

L - D

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89

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26 to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 1.2 1.2

Variable 35-36-01 0.2 0.2 0.402-03-04 1.2 0.8 2.005-06-07 0.8 0.4 1.208-09-10 2.0 2.4 0.4 4.811-12-13 1.0 1.8 0.4 0.2 3.414-15-16 1.0 1.0 2.017-18-19 1.2 0.2 1.420-21-22 0.8 0.6 1.423-24-25 1.2 1.0 0.2 2.426-27-28 1.2 2.2 0.6 4.029-30-31 1.6 1.2 1.4 4.232-33-34 0.6 0.8 0.8 2.2

TOTAL 1.2 12.8 12.6 3.8 0.2 30.6

M O

D E

L - D

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90

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 4.8 4.8

Variable 35-36-01 0.2 0.2 0.4 02-03-04 0.4 0.2 0.6 05-06-07 0.8 0.6 1.4 08-09-10 3.2 1.8 0.8 5.8 11-12-13 2.2 1.4 0.4 4.0 14-15-16 2.6 0.8 3.4 17-18-19 0.8 0.4 1.2 20-21-22 1.8 1.8 23-24-25 1.4 0.6 2.0 26-27-28 0.8 0.8 1.6 29-30-31 1.4 1.2 2.6 32-33-34 0.4 0.4 0.2 1.0

TOTAL 4.8 16.0 8.4 1.4 30.6

M O

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91

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.6 6.6

Variable 35-36-01 02-03-04 0.4 0.4 05-06-07 2.0 0.4 2.4 08-09-10 3.8 1.4 5.2 11-12-13 1.4 0.8 0.6 2.8 14-15-16 2.0 1.2 3.2 17-18-19 1.6 0.8 2.4 20-21-22 1.8 0.6 2.4 23-24-25 2.0 0.6 2.6 26-27-28 1.2 0.6 1.8 29-30-31 0.6 0.2 0.8 32-33-34 0.2 0.2 0.4

TOTAL 6.6 17.0 6.6 0.8 31.0

M O

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92

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.8 6.8

Variable 35-36-01 02-03-04 05-06-07 0.6 0.6 08-09-10 2.4 2.4 0.2 5.0 11-12-13 2.0 1.6 3.6 14-15-16 1.8 0.8 0.2 2.8 17-18-19 0.4 0.4 0.8 20-21-22 2.0 0.4 2.4 23-24-25 4.0 2.4 6.4 26-27-28 1.2 0.6 1.8 29-30-31 0.2 0.2 32-33-34 0.2 0.2

TOTAL 6.8 14.8 8.6 0.4 30.6

M O

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93

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 4.2 4.2

Variable 35-36-01 02-03-04 0.2 0.2 05-06-07 0.4 0.6 1.0 08-09-10 3.8 1.0 4.8 11-12-13 1.8 1.0 2.8 14-15-16 0.8 0.8 17-18-19 0.6 0.6 20-21-22 0.4 0.2 0.6 23-24-25 3.2 1.0 4.2 26-27-28 3.6 0.6 0.4 4.6 29-30-31 1.4 0.4 1.8 32-33-34

TOTAL 4.2 16.2 4.8 0.4 25.6

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94

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 1.6 1.6

Variable 35-36-01 02-03-04 0.6 0.605-06-07 0.6 0.2 0.808-09-10 3.4 1.6 5.011-12-13 1.8 1.0 2.814-15-16 0.6 0.6 1.217-18-19 0.6 0.2 0.820-21-22 0.6 0.623-24-25 0.4 2.2 0.4 3.026-27-28 0.4 3.2 1.8 0.2 5.629-30-31 2.4 0.8 3.232-33-34 0.2 0.2 0.2 0.6

TOTAL 1.6 9.2 11.6 3.2 0.2 25.8

M O

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95

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 1.2 1.2

Variable 35-36-01 0.4 0.2 0.6 02-03-04 0.2 0.2 05-06-07 1.0 1.0 08-09-10 0.8 1.8 0.2 2.8 11-12-13 1.6 2.6 4.2 14-15-16 0.6 0.6 17-18-19 0.2 0.8 1.0 20-21-22 0.4 0.2 0.6 23-24-25 1.2 0.6 1.8 26-27-28 0.8 2.6 1.6 5.0 29-30-31 0.8 2.2 1.2 4.2 32-33-34 0.6 1.0 0.8 2.4

TOTAL 1.2 8.0 12.6 3.8 25.6

M O

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96

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 0.8 0.8

Variable 35-36-01 0.6 0.6 1.202-03-04 0.6 0.2 0.805-06-07 0.6 0.8 0.2 0.2 1.808-09-10 1.0 2.8 0.4 4.211-12-13 0.6 2.0 2.614-15-16 1.0 0.8 1.817-18-19 0.2 0.4 0.620-21-22 0.4 0.423-24-25 0.2 1.0 0.2 1.426-27-28 1.0 2.8 0.4 4.229-30-31 1.6 1.8 0.6 4.032-33-34 0.2 1.8 0.2 2.2

TOTAL 0.8 8.0 15.0 2.0 0.2 26.0

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97

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 2.4 2.4

Variable 35-36-01 0.2 0.8 1.002-03-04 0.2 0.8 1.005-06-07 1.0 0.8 1.808-09-10 2.0 2.8 0.4 0.2 5.411-12-13 1.0 1.2 2.214-15-16 0.2 0.4 0.617-18-19 0.4 0.2 0.620-21-22 0.6 0.4 1.023-24-25 0.4 0.4 0.826-27-28 0.6 1.8 0.2 2.629-30-31 1.4 3.0 0.4 4.832-33-34 0.6 0.8 0.2 1.6

TOTAL 2.4 8.6 13.4 1.2 0.2 25.8

M O

D E

L - D

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98

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26 to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 3.8 3.8

Variable 35-36-01 0.8 0.802-03-04 0.4 0.2 0.605-06-07 1.4 0.4 1.808-09-10 4.4 0.8 0.2 0.2 5.611-12-13 2.6 0.8 0.4 3.814-15-16 1.6 0.4 2.017-18-19 0.8 0.2 1.020-21-22 0.4 0.2 0.623-24-25 2.2 0.2 2.426-27-28 0.8 0.6 1.429-30-31 0.8 0.4 1.232-33-34 0.8 0.2 1.0

TOTAL 3.8 17.0 4.4 0.6 0.2 26.0

M O

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99

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 5.6 5.6

Variable 35-36-01 02-03-04 0.2 0.205-06-07 0.4 0.6 1.008-09-10 3.6 1.6 5.211-12-13 3.2 1.2 4.414-15-16 1.6 1.617-18-19 0.8 0.820-21-22 1.8 0.2 2.023-24-25 1.6 0.8 0.2 2.626-27-28 0.6 0.6 1.229-30-31 1.0 1.032-33-34 0.2 0.2

TOTAL 5.6 14.8 4.8 0.4 0.2 25.8

M O

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100

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 5.0 5.0

Variable 35-36-01 02-03-04 0.6 0.6 05-06-07 0.8 0.4 0.2 1.4 08-09-10 3.2 1.2 4.4 11-12-13 2.0 1.6 3.6 14-15-16 0.4 0.2 0.6 17-18-19 0.4 0.4 20-21-22 1.6 0.2 1.8 23-24-25 2.4 0.8 3.2 26-27-28 2.2 1.4 0.2 3.8 29-30-31 0.6 0.2 0.8 32-33-34

TOTAL 5.0 14.2 6.0 0.4 25.6

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101

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 13.0 13.0

Variable 35-36-01 0.2 0.202-03-04 0.6 0.2 0.805-06-07 2.2 2.208-09-10 3.6 0.8 4.411-12-13 1.6 0.6 2.214-15-16 0.4 0.417-18-19 0.6 0.620-21-22 0.2 0.223-24-25 2.0 2.026-27-28 2.0 0.6 2.629-30-31 0.6 0.2 0.832-33-34 0.4 0.4

TOTAL 13.0 14.4 2.4 29.8

M O

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102

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 3.6 3.6

Variable 35-36-01 0.6 0.4 1.0 02-03-04 0.2 0.2 05-06-07 1.0 0.2 1.2 08-09-10 3.0 2.0 5.0 11-12-13 2.8 1.0 3.8 14-15-16 0.4 0.2 0.6 17-18-19 0.8 0.8 20-21-22 0.8 0.2 1.0 23-24-25 1.2 0.8 0.2 2.2 26-27-28 3.6 3.6 0.6 7.8 29-30-31 1.2 0.4 1.6 32-33-34 0.6 0.2 0.8

TOTAL 3.6 16.2 9.0 0.8 29.6

M O

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103

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 2.2 2.2

Variable 35-36-01 0.6 0.4 1.002-03-04 1.2 0.2 1.405-06-07 1.6 0.4 2.008-09-10 1.0 2.2 0.2 3.411-12-13 1.6 1.0 2.614-15-16 1.2 0.6 1.817-18-19 0.6 0.620-21-22 0.2 0.4 0.623-24-25 1.0 0.4 1.426-27-28 1.6 3.0 0.8 5.429-30-31 1.0 3.2 1.0 5.232-33-34 0.6 1.4 2.0

TOTAL 2.2 12.2 13.2 2.0 29.6

M O

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104

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 2.0 2.0

Variable 35-36-01 0.6 0.8 0.4 0.2 2.002-03-04 0.8 1.0 0.2 2.005-06-07 1.6 0.8 2.408-09-10 1.8 2.0 0.2 0.2 0.2 4.411-12-13 0.2 1.2 0.4 1.814-15-16 0.6 0.4 1.017-18-19 0.2 0.220-21-22 0.4 0.423-24-25 0.2 0.2 0.426-27-28 0.6 2.0 0.4 3.029-30-31 1.4 3.0 1.2 5.632-33-34 1.2 3.0 0.4 4.6

TOTAL 2.0 9.6 14.4 3.2 0.4 0.2 29.8

M O

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105

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 2.8 2.8

Variable 35-36-01 2.0 2.0 0.2 4.202-03-04 1.8 1.0 0.2 3.005-06-07 0.8 1.2 2.008-09-10 3.0 1.0 0.2 4.211-12-13 1.4 0.8 2.214-15-16 0.6 0.617-18-19 0.4 0.420-21-22 23-24-25 0.6 0.2 0.826-27-28 0.8 0.4 1.229-30-31 1.2 2.2 0.6 4.032-33-34 1.6 2.8 4.4

TOTAL 2.8 14.2 11.4 1.4 29.8

M O

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106

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 11.0 11.0

Variable 35-36-01 2.8 0.4 3.202-03-04 2.0 0.2 2.205-06-07 2.8 0.2 3.008-09-10 2.8 1.0 0.4 4.211-12-13 1.4 1.414-15-16 1.6 0.2 1.817-18-19 0.4 0.420-21-22 0.2 0.223-24-25 26-27-28 0.2 0.2 0.429-30-31 0.2 0.232-33-34 1.0 0.4 1.4

TOTAL 11.0 15.4 2.6 0.4 29.4

M O

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107

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 13.2 13.2

Variable 35-36-01 0.4 0.2 0.602-03-04 0.4 0.405-06-07 1.8 1.808-09-10 3.6 1.0 4.611-12-13 1.6 0.8 2.414-15-16 1.8 1.817-18-19 0.8 0.820-21-22 0.6 0.623-24-25 0.8 0.2 1.026-27-28 0.8 0.2 1.029-30-31 0.6 0.2 0.832-33-34 0.4 0.2 0.6

TOTAL 13.2 13.6 2.8 29.6

M O

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108

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 13.0 13.0

Variable 35-36-01 0.2 0.202-03-04 0.4 0.405-06-07 1.0 0.2 1.208-09-10 4.2 0.8 5.011-12-13 3.0 0.4 3.414-15-16 0.6 0.2 0.817-18-19 1.0 1.020-21-22 0.6 0.623-24-25 2.2 2.226-27-28 0.4 0.2 0.629-30-31 0.6 0.2 0.832-33-34 0.6 0.6

TOTAL 13.0 14.6 2.2 29.8

M O

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109

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 22.2 22.2

Variable 35-36-01 02-03-04 05-06-07 08-09-10 2.6 0.6 3.2 11-12-13 1.8 0.4 2.2 14-15-16 0.6 0.6 17-18-19 0.2 0.2 20-21-22 0.4 0.4 23-24-25 1.6 1.6 26-27-28 0.2 0.2 29-30-31 32-33-34 0.2 0.2 0.4

TOTAL 22.2 7.6 1.2 31.0

M O

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110

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 10.0 10.0

Variable 35-36-01 02-03-04 05-06-07 0.8 0.2 1.008-09-10 2.2 1.2 3.411-12-13 1.2 0.4 1.614-15-16 2.0 0.6 2.617-18-19 0.6 0.2 0.820-21-22 1.2 1.223-24-25 6.2 6.226-27-28 2.6 0.8 3.429-30-31 0.2 0.232-33-34 0.6 0.6

TOTAL 10.0 17.6 3.4 31.0

M O

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111

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 4.2 4.2

Variable 35-36-01 0.2 0.2 02-03-04 0.4 0.2 0.6 05-06-07 0.6 0.6 08-09-10 1.2 2.0 0.2 3.4 11-12-13 1.2 0.6 1.8 14-15-16 1.8 0.6 2.4 17-18-19 1.6 0.2 1.8 20-21-22 1.4 1.4 23-24-25 1.8 1.2 3.0 26-27-28 3.6 1.0 4.6 29-30-31 1.8 1.6 0.2 3.6 32-33-34 2.4 0.8 0.2 3.4

TOTAL 4.2 18.0 8.2 0.6 31.0

M O

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112

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 3.2 3.2

Variable 35-36-01 3.0 0.8 0.2 4.002-03-04 0.6 0.6 1.205-06-07 1.6 1.0 2.608-09-10 0.8 1.0 0.4 2.211-12-13 1.2 0.4 1.614-15-16 0.2 0.2 0.417-18-19 0.2 0.220-21-22 0.4 0.423-24-25 0.4 0.2 0.2 0.826-27-28 1.4 1.2 2.629-30-31 3.0 3.0 0.4 6.432-33-34 2.4 2.6 0.4 5.4

TOTAL 3.2 15.2 11.0 1.6 31.0

M O

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113

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.6 6.6

Variable 35-36-01 1.4 0.2 1.6 02-03-04 3.2 0.2 3.4 05-06-07 3.6 0.2 3.8 08-09-10 2.2 0.6 0.4 3.2 11-12-13 1.4 0.2 1.6 14-15-16 17-18-19 0.2 0.2 20-21-22 23-24-25 0.2 0.2 26-27-28 0.2 0.2 29-30-31 3.4 1.4 4.8 32-33-34 3.4 1.8 5.2

TOTAL 6.6 19.2 4.6 0.4 30.8

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114

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 17.2 17.2

Variable 35-36-01 0.6 0.2 0.802-03-04 0.8 0.805-06-07 2.8 0.2 0.2 3.208-09-10 4.0 0.8 4.811-12-13 1.4 0.4 1.814-15-16 0.8 0.817-18-19 20-21-22 0.2 0.223-24-25 26-27-28 0.6 0.629-30-31 0.4 0.432-33-34 0.4 0.4

TOTAL 17.2 12.0 1.6 0.2 31.0

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115

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 18.8 18.8

Variable 35-36-01 02-03-04 0.2 0.205-06-07 1.4 0.2 1.608-09-10 4.6 0.6 0.2 5.411-12-13 2.6 0.2 2.814-15-16 0.8 0.817-18-19 0.6 0.620-21-22 23-24-25 0.2 0.226-27-28 0.2 0.229-30-31 0.2 0.232-33-34 0.2 0.2

TOTAL 18.8 11.0 1.0 0.2 31.0

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116

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 20.4 20.4

Variable 35-36-01 0.2 0.2 02-03-04 05-06-07 1.0 1.0 08-09-10 2.4 0.4 2.8 11-12-13 3.8 0.2 4.0 14-15-16 0.6 0.6 17-18-19 0.2 0.2 0.4 20-21-22 0.2 0.2 23-24-25 0.8 0.8 26-27-28 29-30-31 0.2 0.2 32-33-34

TOTAL 20.4 9.4 0.8 30.6

M O

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117

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 22.8 22.8

Variable 35-36-01 02-03-04 05-06-07 0.4 0.4 08-09-10 1.0 1.0 11-12-13 0.6 0.2 0.8 14-15-16 0.2 0.2 17-18-19 20-21-22 1.2 1.2 23-24-25 2.2 2.2 26-27-28 1.0 1.0 29-30-31 0.2 0.2 32-33-34

TOTAL 22.8 6.8 0.2 29.8

M O

D E

L - D

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118

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26 to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 10.2 10.2

Variable 35-36-01 02-03-04 05-06-07 0.6 0.608-09-10 1.2 0.2 1.411-12-13 0.8 0.814-15-16 0.6 0.617-18-19 0.2 0.220-21-22 0.4 0.423-24-25 9.0 0.2 0.2 9.426-27-28 4.4 1.0 5.429-30-31 0.8 0.2 1.032-33-34

TOTAL 10.2 18.0 1.6 0.2 30.0

M O

D E

L - D

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119

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 234meters above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36 to 40

41to 45

46to 50

>50

TOTAL

Calm 4.4 4.4

Variable 35-36-01 0.4 0.2 0.602-03-04 0.2 0.205-06-07 1.0 0.2 1.208-09-10 0.4 0.2 0.611-12-13 0.6 0.4 1.014-15-16 1.0 0.2 1.217-18-19 1.4 0.2 1.620-21-22 0.4 0.423-24-25 1.4 0.6 2.026-27-28 3.8 2.6 0.2 0.2 6.829-30-31 3.0 2.4 0.4 5.832-33-34 3.0 1.0 0.2 4.2

TOTAL 4.4 16.6 8.0 0.8 0.2 30.0

M O

D E

L - D

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120

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 2.2 2.2

Variable 35-36-01 2.0 1.2 3.202-03-04 0.8 0.2 1.005-06-07 1.2 0.2 1.408-09-10 0.4 0.6 1.011-12-13 0.2 0.214-15-16 0.2 0.217-18-19 0.2 0.220-21-22 0.2 0.223-24-25 26-27-28 0.6 2.2 0.4 3.229-30-31 2.0 5.0 2.2 0.2 9.432-33-34 2.6 5.2 7.8

TOTAL 2.2 10.2 14.8 2.6 0.2 30.0

M O

D E

L - D

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121

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 6.6 6.6

Variable 35-36-01 1.2 1.2 02-03-04 1.8 1.8 05-06-07 2.2 0.2 2.4 08-09-10 0.8 0.2 1.0 11-12-13 0.2 0.2 14-15-16 17-18-19 20-21-22 23-24-25 0.2 0.2 26-27-28 2.4 1.0 3.4 29-30-31 7.0 1.2 8.2 32-33-34 4.2 0.8 5.0

TOTAL 6.6 20.0 3.4 30.0

M O

D E

L - D

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122

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 21.0 21.0

Variable 35-36-01 0.2 0.2 02-03-04 0.2 0.2 05-06-07 1.2 1.2 08-09-10 1.8 0.4 0.2 2.4 11-12-13 0.6 0.6 14-15-16 0.2 0.2 0.4 17-18-19 20-21-22 0.4 0.4 23-24-25 0.4 0.4 26-27-28 1.6 0.2 1.8 29-30-31 0.8 0.8 32-33-34 0.2 0.2

TOTAL 21.0 7.4 1.0 0.2 29.6

M O

D E

L - D

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123

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 23.2 23.2

Variable 35-36-01 02-03-04 0.2 0.2 05-06-07 0.2 0.2 08-09-10 2.6 2.6 11-12-13 0.8 0.4 1.2 14-15-16 17-18-19 0.2 0.2 20-21-22 23-24-25 0.2 0.2 26-27-28 1.2 1.2 29-30-31 0.4 0.2 0.6 32-33-34 0.2 0.2

TOTAL 23.2 5.8 0.8 29.8

M O

D E

L - D

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124

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : NovemberLongitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 22.2 22.2

Variable 35-36-01 0.2 0.2 02-03-04 0.2 0.2 05-06-07 0.6 0.6 08-09-10 1.4 0.2 1.6 11-12-13 1.2 1.2 14-15-16 0.4 0.4 17-18-19 20-21-22 0.8 0.8 23-24-25 1.6 1.6 26-27-28 0.2 0.2 0.4 29-30-31 0.4 0.2 0.6 32-33-34 0.2 0.2

TOTAL 22.2 7.2 0.6 30.0

M O

D E

L - D

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125

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 00 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 20.4 20.4

Variable 35-36-01 0.2 0.2 02-03-04 0.2 0.2 05-06-07 0.2 0.2 08-09-10 1.8 0.2 2.0 11-12-13 0.4 0.2 0.6 14-15-16 17-18-19 20-21-22 1.6 1.6 23-24-25 2.4 2.4 26-27-28 1.4 0.2 1.6 29-30-31 1.0 0.2 1.2 32-33-34

TOTAL 20.4 9.2 0.8 30.4

M O

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126

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 03 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 14.0 14.0

Variable 35-36-01 0.2 0.202-03-04 0.2 0.205-06-07 08-09-10 0.4 0.2 0.611-12-13 1.8 0.2 2.014-15-16 0.2 0.2 0.417-18-19 0.2 0.220-21-22 0.8 0.823-24-25 6.2 0.8 7.026-27-28 3.2 0.4 3.629-30-31 1.0 0.6 1.632-33-34 0.2 0.2

TOTAL 14.0 14.4 2.4 30.8

M O

D E

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127

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 meters above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 06 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 4.4 4.4

Variable 35-36-01 0.4 0.4 02-03-04 0.2 0.2 05-06-07 0.4 0.4 08-09-10 0.2 0.4 0.6 11-12-13 0.8 0.4 1.2 14-15-16 1.2 0.4 1.6 17-18-19 0.2 0.2 20-21-22 0.6 0.6 23-24-25 2.6 0.6 3.2 26-27-28 6.2 2.8 0.2 9.2 29-30-31 3.8 3.2 0.2 7.2 32-33-34 1.2 0.2 1.4

TOTAL 4.4 17.8 8.0 0.4 30.6

M O

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128

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 09 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11 to 15

16 to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 1.8 1.8

Variable 35-36-01 0.8 0.6 1.402-03-04 0.6 0.605-06-07 1.0 1.008-09-10 0.6 0.8 1.411-12-13 0.2 0.2 0.2 0.614-15-16 0.6 0.617-18-19 20-21-22 0.8 0.823-24-25 0.6 0.2 0.826-27-28 2.8 2.6 0.4 5.829-30-31 4.8 4.2 2.2 11.232-33-34 1.6 2.8 0.2 4.6

TOTAL 1.8 14.4 11.4 2.8 0.2 30.6

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129

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 12 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION

0 1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 7.6 7.6

Variable 35-36-01 0.2 0.2 02-03-04 0.6 0.6 05-06-07 1.2 1.2 08-09-10 0.8 0.2 1.0 11-12-13 0.8 0.2 1.0 14-15-16 0.2 0.2 17-18-19 0.2 0.2 20-21-22 23-24-25 0.8 0.8 26-27-28 6.8 0.6 7.4 29-30-31 6.8 1.6 8.4 32-33-34 1.6 0.2 1.8

TOTAL 7.6 20.0 2.8 30.4

M O

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130

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 15 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11 to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 20.2 20.2

Variable 35-36-01 0.6 0.6 02-03-04 05-06-07 0.6 0.6 08-09-10 0.8 0.2 1.0 11-12-13 0.6 0.4 0.2 1.2 14-15-16 0.2 0.2 0.4 17-18-19 20-21-22 0.2 0.2 23-24-25 0.2 0.2 26-27-28 2.6 2.6 29-30-31 2.8 0.4 3.2 32-33-34 0.4 0.2 0.6

TOTAL 20.2 9.0 1.4 0.2 30.8

M O

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131

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 18 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46to 50

>50

TOTAL

Calm 23.6 23.6

Variable 35-36-01 0.6 0.6 02-03-04 0.2 0.2 0.4 05-06-07 0.2 0.2 08-09-10 2.2 0.4 2.6 11-12-13 0.6 0.6 14-15-16 0.2 0.2 17-18-19 0.2 0.2 20-21-22 0.2 0.2 23-24-25 0.6 0.6 26-27-28 0.8 0.8 29-30-31 0.8 0.8 32-33-34 0.2 0.2

TOTAL 23.6 6.6 0.8 31.0

M O

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132

CLIMATOLOGICAL SUMMARY

MODEL – D

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 – 2002

Time : 21 UTC

Mean number of occurrences of concurrent wind direction (in 30 degree sectors) and wind speed (in knots) within the specified ranges.

WIND SPEED WIND

DIRECTION 0

1 to 5

6 to 10

11to 15

16to 20

21to 25

26to 30

31to 35

36to 40

41to 45

46 to 50

>50

TOTAL

Calm 21.4 21.4

Variable 35-36-01 0.2 0.2 02-03-04 05-06-07 0.4 0.2 0.6 08-09-10 2.0 0.2 2.2 11-12-13 0.6 0.2 0.8 14-15-16 0.2 0.2 17-18-19 0.2 0.2 20-21-22 0.6 0.6 23-24-25 2.6 2.6 26-27-28 1.2 0.2 1.4 29-30-31 0.2 0.2 0.2 0.6 32-33-34

TOTAL 21.4 8.2 1.0 0.2 30.8

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Fig. 5. Windroses - Morning (0300 UTC)

FEBRUARY

422

28

JANUARY

461

36

APRIL

448

12

MARCH

463

16

JUNE

435

8

MAY

463

7

AUGUST

450

11

JULY

463

8

SEPTEMBER

443

17

DECEMBER

460

52

OCTOBER

463

42

NOVEMBER

450

45

SCALE OF FREQUENCIES (%)

0 10 20 30 40 50

N

C

1 - 5 6 - 11 12 - 19 > 19 kmph.

1 - 3 4 - 6 7 - 10 > 10 knots.

N - Total No. of ObservationsC - Total No. of Calms in Percentage Frequencies

N

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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Fig. 6. Windroses - Afternoon (1200 UTC)

FEBRUARY

422

7

JANUARY

459

10

MARCH

448

3

JUNE

437

5

APRIL

447

5

MAY

464

5

AUGUST

445

11

JULY

458

7

SEPTEMBER

446

11

DECEMBER

462

38

SCALE OF FREQUENCIES (%)

0

NOVEMBER

449

39

10 20 30 40 50

N

C

1 - 5 6 - 11 12 - 19 > 19 kmph.

1 - 3 4 - 6 7 - 10 > 10 knots.

N - Total No. of ObservationsC - Total No. of Calms in Percentage Frequencies

N

OCTOBER

465

29

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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MO

DE

L-

E

AERONAUTICALCLIMATOLOGICAL

SUMMARIES

JANUARY FEBRUARY MARCH

APRIL MAY JUNE

JULY AUGUST SEPTEMBER

OCTOBER NOVEMBER DECEMBER

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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133

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 1.4 16.4 6.0 0.8 24.601 1.6 16.4 6.4 0.4 24.802 2.6 16.0 6.2 0.4 25.203 0.2 16.0 8.2 0.8 25.204 9.8 12.0 3.4 25.205 3.8 12.4 8.6 0.6 25.406 2.4 8.4 11.2 2.6 0.2 24.807 0.4 6.8 13.2 4.8 0.2 25.408 5.0 12.0 8.0 0.4 25.409 3.4 13.0 8.6 0.4 25.410 2.6 13.8 8.6 0.4 25.411 3.0 15.0 6.8 0.4 0.2 25.412 6.0 14.6 4.8 25.413 11.0 13.2 0.8 25.014 0.4 14.6 9.8 0.4 25.215 0.6 18.6 6.0 0.2 25.416 1.8 18.6 5.0 25.417 4.8 16.6 4.0 25.418 7.2 15.6 2.6 25.419 10.0 13.2 2.0 25.220 11.8 11.8 1.2 24.821 0.2 14.2 9.2 1.4 25.022 0.2 15.2 8.8 0.8 25.023 0.2 17.0 7.0 0.6 24.8

TOTAL 6.4 164.2 231.4 153.8 46.2 2.0 0.2 604.2 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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134

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 8.4 15.4 3.2 27.001 9.8 14.8 2.2 26.802 9.6 14.2 2.8 26.603 5.4 16.0 4.6 0.6 26.604 1.0 10.2 13.2 2.2 0.2 26.805 0.2 4.8 13.6 7.0 1.0 26.606 2.0 11.4 12.0 1.8 27.207 1.4 6.8 14.8 3.6 26.608 1.2 4.6 15.2 5.4 26.409 0.8 4.2 14.6 7.2 0.2 27.010 0.6 4.6 14.2 6.8 0.6 26.811 0.8 5.0 14.6 6.2 26.612 1.0 6.6 15.6 3.6 26.813 2.0 12.6 11.2 1.0 26.814 3.2 14.6 8.2 0.6 26.615 5.2 16.2 5.4 0.2 27.016 8.0 15.6 3.4 27.017 11.8 12.4 2.8 27.018 0.4 13.0 12.4 1.4 27.219 0.8 14.8 10.4 1.2 27.220 1.8 15.8 8.8 0.6 27.021 3.4 16.4 6.8 0.4 27.022 4.6 16.6 5.6 0.4 27.223 7.0 14.4 5.4 0.2 27.0

TOTAL 52.4 204.4 203.6 146.0 37.6 0.8 644.8 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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135

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 10.8 14.2 3.6 28.601 11.0 14.0 3.4 28.402 9.8 14.2 4.2 0.4 28.603 3.4 12.8 10.2 2.6 29.004 0.4 9.2 12.2 6.2 1.0 29.005 0.2 3.2 11.8 10.4 3.0 0.2 28.806 1.6 9.8 11.0 5.6 0.4 28.407 0.8 6.2 14.0 6.8 0.8 28.608 0.4 5.0 13.8 8.4 1.4 29.009 0.6 3.8 13.4 8.8 2.0 28.610 0.6 2.6 14.4 9.0 2.2 28.811 0.8 3.6 14.2 8.2 2.0 28.812 0.6 6.8 13.0 7.2 1.0 28.613 1.8 10.4 11.4 5.2 0.2 29.014 0.2 2.2 13.4 10.6 2.6 29.015 0.2 3.8 16.6 8.0 0.4 29.016 0.4 6.2 16.2 5.6 0.2 28.617 0.6 9.0 13.6 5.6 28.818 1.6 11.0 13.4 3.0 29.019 2.2 12.8 11.8 2.2 29.020 3.2 13.6 10.6 1.4 28.821 4.4 15.0 8.4 1.0 28.822 6.4 14.4 7.0 0.6 28.423 8.6 14.2 5.4 0.4 28.6

TOTAL 63.4 177.0 210.0 163.2 66.4 10.2 690.2 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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136

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 4.2 13.6 11.2 0.6 29.601 4.2 12.6 12.8 0.4 30.002 1.2 11.8 14.4 2.4 29.803 7.6 12.2 10.2 30.004 1.8 10.6 15.2 2.4 30.005 0.2 6.6 15.0 8.2 30.006 3.4 12.2 13.4 0.6 29.607 0.2 2.2 10.4 14.2 3.0 30.008 0.2 1.2 9.4 14.8 4.4 30.009 1.0 8.4 13.8 6.6 29.810 0.2 1.0 7.8 12.4 8.2 29.611 1.2 7.8 13.4 7.2 29.612 1.6 8.6 14.2 5.0 29.413 0.6 2.8 11.8 12.6 1.8 29.614 0.4 6.6 13.6 8.8 0.4 29.815 1.0 9.8 14.0 4.8 0.2 29.816 1.8 11.8 14.2 2.0 29.817 2.4 13.2 13.4 0.8 29.818 4.4 15.4 9.8 0.4 30.019 6.2 16.4 7.4 30.020 0.2 8.8 15.2 5.6 0.2 30.021 0.6 10.6 15.4 3.4 30.022 1.4 12.6 13.4 2.2 29.623 3.0 12.6 13.0 1.4 30.0

TOTAL 14.8 109.6 212.4 205.2 136.4 37.4 715.8 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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137

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 0.2 3.4 16.4 11.0 31.001 0.2 2.8 15.6 11.6 0.2 30.402 0.2 0.2 1.6 10.4 16.4 1.8 30.603 0.2 1.0 6.0 15.8 7.6 30.604 1.2 3.6 12.0 13.6 0.6 31.005 0.6 2.2 8.0 15.8 4.4 31.006 0.2 2.2 5.6 14.2 8.6 30.807 0.2 1.4 4.8 12.2 11.6 0.4 30.608 1.6 3.4 10.6 14.0 0.8 30.409 1.0 4.0 9.2 15.2 1.6 31.010 0.6 4.2 8.6 14.2 3.0 30.611 0.2 0.8 3.4 9.8 13.8 2.6 30.612 0.4 5.2 9.8 14.6 0.8 30.813 1.2 5.2 12.6 11.2 0.2 30.414 0.2 2.4 7.0 15.4 5.6 30.615 0.2 4.0 8.4 16.6 1.8 31.016 0.2 5.4 10.8 14.0 0.6 31.017 0.8 6.2 12.8 10.8 30.618 0.6 6.8 17.0 6.4 30.819 1.0 8.4 17.0 4.4 30.820 1.4 8.6 18.0 3.0 31.021 1.4 11.2 17.2 1.2 31.022 2.2 12.8 14.8 0.6 30.423 0.2 2.4 14.0 13.6 0.2 30.4

TOTAL 0.2 1.0 21.6 143.2 247.2 198.6 116.2 9.4 737.4 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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138

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 1.2 17.8 9.4 28.401 0.6 16.8 11.2 28.602 0.6 11.2 16.0 0.8 28.603 0.6 6.0 20.0 1.8 28.404 0.8 3.4 17.6 6.4 28.205 0.6 3.0 12.4 12.4 28.406 0.6 2.0 9.6 15.0 0.8 28.007 0.4 2.2 5.8 17.2 2.8 28.408 0.8 2.8 4.8 16.0 4.0 28.409 3.0 4.8 14.0 6.2 28.010 0.4 3.6 4.0 13.4 6.8 28.211 0.4 3.0 5.4 12.6 7.0 28.412 0.2 3.4 7.0 12.6 5.4 28.613 0.2 4.2 7.6 13.4 3.2 28.614 0.2 4.8 10.6 11.0 1.6 28.215 0.2 6.2 13.2 8.4 28.016 0.2 6.6 14.0 7.2 28.017 0.2 7.6 16.0 4.6 28.418 0.4 8.2 17.2 2.8 28.619 0.4 9.4 16.4 2.0 28.220 0.4 10.8 15.4 1.2 27.821 0.4 12.6 15.0 0.2 28.222 0.6 14.6 13.0 0.2 28.423 1.2 14.4 12.2 27.8

TOTAL 11.6 177.6 278.6 173.2 37.8 678.8 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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139

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 0.4 20.6 10.0 31.001 0.4 19.2 10.8 30.402 0.4 17.2 13.0 30.603 12.8 18.0 0.2 31.004 9.4 17.2 4.2 30.805 0.2 6.2 16.6 7.6 30.606 5.2 15.4 10.0 30.607 4.2 13.8 12.4 30.408 3.4 14.0 11.4 1.6 30.409 2.2 13.2 12.0 2.8 30.210 3.8 12.6 11.0 3.4 30.811 3.8 14.0 9.6 3.4 30.812 4.4 14.2 9.2 2.8 30.613 5.2 15.0 9.6 1.0 30.814 7.8 14.8 8.2 30.815 9.0 14.6 7.0 30.616 12.0 13.4 5.6 31.017 13.4 13.2 4.2 30.818 0.2 14.4 14.2 2.2 31.019 0.2 15.6 13.8 1.4 31.020 17.2 13.8 31.021 18.4 12.2 30.622 19.0 11.8 30.823 0.2 20.4 10.4 31.0

TOTAL 2.0 264.8 330.0 125.8 15.0 737.6 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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140

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 0.2 22.4 2.8 0.2 25.601 0.2 22.0 2.8 0.2 25.202 0.2 18.0 7.0 25.203 0.2 10.6 15.0 25.804 5.8 19.6 0.2 25.605 3.4 20.2 2.0 25.606 2.6 18.2 4.8 25.607 2.6 14.8 8.2 25.608 2.8 12.2 10.6 25.609 3.2 11.2 11.6 26.010 3.0 10.8 12.2 26.011 3.4 10.4 12.2 26.012 5.2 10.6 10.0 25.813 0.2 5.2 14.4 6.2 26.014 6.6 15.6 3.8 26.015 7.8 16.4 1.8 26.016 10.0 15.8 0.2 26.017 11.4 14.6 26.018 0.2 12.0 13.6 25.819 0.2 14.0 11.4 25.620 0.2 16.0 9.8 26.021 0.2 17.8 7.6 25.622 0.2 19.2 6.2 25.623 0.2 20.6 5.0 25.8

TOTAL 2.2 245.6 286.0 84.2 618.0

Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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141

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 6.2 23.0 0.6 29.801 6.2 22.8 0.4 29.402 3.8 23.2 2.4 0.2 29.603 0.6 19.2 9.8 29.604 0.6 9.4 19.2 0.4 29.605 0.6 5.2 23.6 0.4 29.806 0.6 3.2 19.6 6.2 29.607 0.2 3.4 16.6 9.4 29.608 0.4 3.4 15.4 10.6 29.809 0.6 3.2 12.8 13.2 29.810 0.6 3.6 12.6 13.0 29.811 0.6 5.2 13.6 10.4 29.812 0.8 5.6 15.6 7.8 29.813 1.2 6.6 19.8 2.2 29.814 1.2 8.4 20.2 29.815 0.8 13.0 15.6 29.416 1.2 16.8 11.4 29.417 1.2 19.6 8.6 29.418 1.6 23.2 4.8 29.619 2.2 23.8 3.8 29.820 2.4 25.0 2.2 29.621 3.4 24.6 1.8 29.822 4.2 24.4 0.8 0.2 29.623 5.8 23.4 0.4 29.6

TOTAL 47.0 339.2 251.6 74.0 711.8 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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142

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 5.4 21.0 4.6 31.001 5.4 21.0 4.4 30.802 3.2 19.2 7.8 30.203 0.4 11.8 18.4 0.4 31.004 0.2 3.4 21.0 6.4 31.005 0.8 13.4 16.8 31.006 0.8 6.8 22.4 1.0 31.007 0.8 3.0 22.2 4.2 30.208 1.0 1.6 20.8 7.0 30.409 0.8 1.0 19.8 9.4 31.010 0.8 0.8 20.6 8.6 30.811 0.6 1.8 23.4 5.0 30.812 1.0 6.6 22.0 1.2 30.813 0.8 17.8 12.2 30.814 3.2 22.4 5.2 30.815 4.8 24.2 2.0 31.016 8.4 21.6 0.8 30.817 10.8 20.2 31.018 16.8 14.2 31.019 18.6 12.2 30.820 0.8 20.8 9.0 30.621 1.2 21.2 8.2 30.622 1.8 22.6 6.6 31.023 4.0 21.8 5.2 31.0

TOTAL 22.4 232.8 252.8 195.0 36.4 739.4 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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143

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 0.6 11.0 14.6 3.6 29.801 0.4 11.8 14.0 3.4 29.602 0.6 10.8 14.2 4.2 29.803 4.0 17.2 7.8 1.0 30.004 11.8 14.6 3.6 30.005 2.6 17.0 9.0 1.4 30.006 0.2 10.8 15.8 3.2 30.007 6.0 18.8 5.2 30.008 3.6 20.0 6.0 0.4 30.009 0.2 2.0 20.2 7.2 0.4 30.010 0.2 1.6 20.4 7.4 0.4 30.011 0.2 4.2 20.2 4.8 0.4 29.812 0.2 11.8 16.6 1.4 30.013 2.2 18.6 8.8 0.2 29.814 6.4 17.6 5.8 29.815 0.2 9.8 16.0 3.6 29.616 0.8 12.8 13.8 2.4 29.817 1.0 14.2 13.2 1.4 0.2 30.018 1.6 17.2 10.2 0.8 29.819 3.2 17.8 8.6 0.2 29.820 4.8 19.0 6.2 30.021 6.4 18.2 5.4 30.022 9.0 17.0 3.8 0.2 30.023 11.0 15.2 3.2 0.4 29.8

TOTAL 1.8 75.6 225.0 207.2 169.2 37.0 1.6 717.4 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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144

CLIMATOLOGICAL SUMMARY

MODEL – E

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 - 2002

Mean number of occurrences of screen temperature (degrees Celsius) in specified ranges of 5 degrees at the specified times.

TEMPERATURE TIME (UTC)

-10 to -5

-5 to 0

0 to 5

5 to 10

10 to 15

15 to 20

20 to 25

25 to 30

30 to 35

35 to 40

40 to 45

45 to 50

TOTAL

00 0.2 13.2 16.6 0.4 30.401 0.2 15.0 15.0 0.2 30.402 0.2 16.0 13.4 0.8 30.403 8.2 20.4 2.2 30.804 3.8 12.2 13.4 0.8 30.205 2.4 4.8 16.8 6.6 30.606 0.6 3.4 10.4 15.4 0.8 30.607 3.8 5.0 18.8 3.0 30.608 2.6 3.0 19.4 5.6 30.609 1.2 3.8 17.6 8.0 30.610 0.8 4.6 17.0 8.2 30.611 1.2 5.6 18.2 5.6 30.612 3.0 11.2 15.6 0.6 30.413 3.8 21.4 5.6 30.814 6.4 22.2 2.0 30.615 0.2 10.2 19.4 1.0 30.816 1.2 13.4 16.2 0.2 31.017 1.8 15.4 13.6 0.2 31.018 3.2 19.6 8.2 31.019 3.6 22.0 5.2 30.820 5.8 21.2 3.8 30.821 7.2 21.6 2.0 30.822 9.6 20.0 1.0 30.623 12.0 18.0 0.8 30.8

TOTAL 0.6 103.8 270.0 191.2 138.4 31.8 735.8 Note : The range 5-10 comprises the values 5.0 to 9.9 inclusive

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0

5

10

15

20

25

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

0

5

10

15

20

25

30

35

40

45

50

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Fig. 7 (a) Mean Monthly Temperature

Fig. 7 (b) Highest Maximum Temperature (ever recorded)

Fig. 7 (c) Lowest Minimum Temperature (ever recorded)

°C

27.7

,7/1

973

33.4

,5/1

967

39.3

,29/1

973

45.3

,25/1

970

47.2

,20/1

978

46.5

,19/1

972

44.5

,2/1

974

41.9

,3/1

972

40.6

,2/1

979

39.6

,2/1

961

35.2

,6/1

978

30.0

,12/1

968

-1.6

,6/1

974

3.4

,1/1

972

8.6

,6/1

967

14.6

,2/1

966

19.8

,6/1

970

17.8

,7/1

964

20.2

,30/1

968

13.6

,23/1

972

9.9

,30/1

964

2.1

,30/1

966

-1.3

,30/1

973

-2.2

,11/1

967°C

Temperature

0

10

20

30

40

50

Jan Feb M ar A pr M ay Jun Jul A ug S ep Oc t Nov Dec

0C

m ean m ax im um m ean m inim um

°C

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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TA

BL

E-V

I

AERONAUTICALCLIMATOLOGICAL

SUMMARIES

JANUARY FEBRUARY MARCH

APRIL MAY JUNE

JULY AUGUST SEPTEMBER

OCTOBER NOVEMBER DECEMBER

NEXTBACKCONTENTS

MODEL AMODEL AMODEL AMODEL AMODEL A MODEL B MODEL C TABLE VIMODEL EMODEL D

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145

CLIMATOLOGICAL SUMMARY TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : January Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 991.8 992.3 992.3 992.0 991.6 02 991.6 992.9 994.0 991.0 992.4 03 991.4 992.8 993.6 990.5 991.3 04 990.9 992.7 993.5 990.6 991.1 05 989.8 991.4 991.6 988.4 989.3 06 988.2 987.5 990.6 987.9 989.5 07 988.4 989.9 990.8 988.6 989.9 08 989.6 991.5 992.4 989.3 990.5 09 989.4 991.3 992.4 989.8 991.4 10 990.1 992.0 992.7 989.7 990.6 11 989.1 990.5 990.8 987.8 988.7 12 987.5 988.7 989.5 987.0 988.7 13 988.1 990.0 990.7 987.5 988.7 14 987.9 989.4 990.1 987.1 988.5 15 987.0 988.9 990.0 987.5 989.6 16 988.5 990.5 991.2 988.4 989.6 17 988.9 990.7 992.1 988.5 989.8 18 988.5 990.5 991.3 990.9 990.0 19 988.8 990.4 991.4 988.3 990.2 20 988.9 990.8 991.9 988.5 990.0 21 988.8 990.2 991.0 987.1 988.3 22 986.7 988.1 989.4 985.5 987.8 23 987.0 988.9 990.1 987.5 988.9 24 987.8 989.4 990.8 988.3 989.5 25 988.9 990.6 991.0 987.8 989.1 26 987.4 988.6 989.5 986.6 987.8 27 986.8 988.3 989.8 986.3 988.1 28 986.4 988.8 989.9 990.3 990.0 29 989.7 991.7 992.7 989.8 991.1 30 989.4 990.8 991.5 988.6 989.8 31 988.7 990.6 991.4 988.9 990.6

TOTAL 30652.0 30700.7 30730.0 30646.0 30682.4

Pm Mean 988.8 990.3 991.3 988.6 989.8 • Required only if summary refers to a station at an international aerodrome Notes a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is

based, are those made at the meteorological pressure observation site at the station b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and

the specified time.

T A

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E - V

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146

CLIMATOLOGICAL SUMMARY TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : February Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 989.1 990.3 989.6 986.8 988.5 02 988.3 990.1 991.5 988.4 990.2 03 989.3 990.8 992.8 988.3 990.2 04 989.1 990.5 991.3 987.3 988.7 05 987.5 989.8 990.6 987.7 989.3 06 987.9 990.3 990.8 987.7 989.0 07 987.7 990.1 991.1 988.1 989.4 08 988.4 990.3 991.1 988.5 990.3 09 989.4 990.9 991.6 988.4 989.8 10 988.1 989.7 990.7 987.4 988.6 11 987.6 988.9 989.5 986.7 989.4 12 989.0 991.3 992.4 989.8 991.4 13 989.9 991.5 992.3 988.7 990.7 14 988.4 990.1 990.7 987.4 989.1 15 987.4 989.7 990.4 987.5 989.3 16 988.0 989.9 990.6 986.8 988.3 17 987.5 989.0 989.8 986.4 988.1 18 987.1 989.1 989.7 986.7 988.6 19 987.7 989.8 990.5 987.2 988.8 20 986.6 988.5 989.2 985.7 987.8 21 987.0 990.2 990.1 988.0 988.6 22 987.7 989.9 990.6 987.5 989.2 23 987.4 989.4 990.3 987.1 988.0 24 986.3 987.8 988.0 984.7 986.4 25 985.1 987.0 988.3 985.8 988.0 26 986.8 988.5 989.6 986.4 987.5 27 986.5 988.5 989.3 986.4 988.3 28 743.2 989.4 990.2 986.9 988.9 29 984.9 986.0 986.5 983.4 984.2 30 31

TOTAL 28398.9 28697.3 28719.1 28627.7 28674.6

Pm Mean 979.3 989.6 990.3 987.2 988.8 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

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E - V

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147

CLIMATOLOGICAL SUMMARY TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : March Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 987.2 988.8 989.2 985.9 987.4 02 985.8 987.4 988.5 985.7 987.7 03 987.0 989.1 989.6 986.8 987.8 04 986.7 988.1 988.3 984.7 985.8 05 985.1 987.4 987.8 984.3 986.0 06 984.4 986.4 987.4 984.6 986.3 07 984.9 986.7 987.4 984.3 985.9 08 984.5 986.4 986.9 984.0 986.8 09 984.2 986.1 987.0 983.5 985.3 10 983.9 986.0 986.8 983.7 985.3 11 983.5 985.4 985.9 982.4 984.1 12 982.8 984.7 985.3 981.1 984.2 13 983.9 985.6 987.1 984.1 986.4 14 985.1 987.4 988.1 985.0 986.8 15 985.4 987.3 988.0 984.9 986.6 16 984.3 986.2 986.6 983.1 984.0 17 982.9 984.4 984.7 982.2 983.7 18 983.8 986.2 986.8 984.0 985.9 19 985.1 987.0 987.5 984.4 985.4 20 983.7 985.6 985.6 981.8 983.8 21 982.7 984.4 984.5 982.0 983.4 22 982.0 983.8 984.0 981.2 983.0 23 981.5 983.6 984.5 981.5 983.4 24 982.4 984.7 984.9 981.4 982.6 25 981.4 983.4 983.9 980.9 982.7 26 982.4 984.7 985.2 982.0 983.9 27 982.7 984.6 984.8 981.6 983.2 28 982.1 983.8 984.1 980.3 982.7 29 982.2 984.3 984.8 981.6 983.5 30 982.6 985.0 983.7 981.4 983.6 31 982.9 984.8 985.3 981.3 983.4

TOTAL 30499.1 30559.3 30574.2 30475.7 30530.6

Pm Mean 983.8 985.8 986.3 983.1 984.9 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

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148

CLIMATOLOGICAL SUMMARY TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : April Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 983.6 984.7 984.7 981.3 983.0 02 981.8 983.8 983.9 980.3 982.2 03 981.6 983.7 984.5 981.3 983.1 04 982.1 984.6 985.0 980.6 982.8 05 982.3 983.8 984.3 980.8 982.9 06 982.2 984.0 985.6 981.0 982.5 07 981.7 983.7 983.8 980.2 981.4 08 980.5 982.1 982.6 977.9 980.1 09 980.0 981.6 981.8 978.0 980.2 10 979.4 981.5 981.7 978.5 980.5 11 980.4 982.5 982.7 978.9 981.2 12 981.0 982.7 983.0 979.0 981.0 13 980.2 981.8 982.2 977.9 980.3 14 980.4 982.6 982.9 978.8 981.3 15 981.2 983.6 984.1 980.6 982.8 16 981.8 983.5 983.5 979.2 981.5 17 980.5 982.1 982.3 978.8 980.5 18 979.9 981.8 982.1 979.7 980.4 19 979.5 981.3 981.4 977.8 979.7 20 979.4 981.5 981.4 977.6 979.4 21 978.9 980.7 980.4 976.8 978.8 22 978.7 980.5 980.5 976.5 978.4 23 978.0 979.7 979.4 975.4 977.6 24 976.9 979.0 979.6 974.8 976.9 25 976.3 978.0 977.5 973.8 977.2 26 976.9 979.2 979.3 976.0 978.1 27 977.2 979.2 979.3 974.7 976.9 28 976.6 978.1 977.7 974.0 962.9 29 976.5 978.2 978.4 974.5 976.8 30 977.0 978.9 978.9 975.3 977.2 31

TOTAL 29392.5 29448.4 29454.5 29340.0 29387.6

Pm Mean 979.8 981.6 981.8 978.0 979.6 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

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149

CLIMATOLOGICAL SUMMARY

TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : May Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 976.7 978.7 978.7 975.6 976.9 02 976.9 979.0 979.1 975.0 977.3 03 977.0 979.0 979.1 975.2 978.0 04 977.5 979.3 978.9 975.3 977.7 05 977.5 979.4 979.2 975.0 976.8 06 977.1 978.9 978.7 974.6 977.2 07 977.2 979.7 979.8 976.5 977.4 08 978.1 979.8 979.4 975.7 977.8 09 977.6 979.1 978.9 974.7 976.7 10 976.3 977.8 977.4 973.8 975.8 11 976.3 979.0 978.0 973.8 976.1 12 976.3 977.9 977.8 973.3 977.0 13 977.0 979.1 979.1 974.6 976.5 14 976.6 978.1 977.9 973.5 976.3 15 976.3 978.3 977.9 973.4 976.3 16 976.2 977.9 977.9 974.0 975.8 17 975.7 977.9 977.7 972.8 976.1 18 974.9 976.5 976.3 971.1 973.5 19 973.5 974.8 974.2 970.3 972.7 20 973.0 974.8 975.0 971.1 973.8 21 974.3 975.6 975.9 972.6 975.0 22 974.8 976.6 975.8 972.6 974.5 23 974.7 976.1 975.8 971.9 973.8 24 973.3 974.9 974.4 970.7 972.7 25 972.5 974.2 973.7 969.7 973.1 26 972.0 974.2 974.1 970.9 973.1 27 973.8 975.8 975.5 971.6 975.3 28 974.6 975.6 976.1 972.2 973.7 29 974.1 976.5 975.3 971.9 974.0 30 974.4 975.9 976.0 972.6 974.2 31 975.0 977.1 976.8 973.4 975.0

TOTAL 30241.2 30297.5 30290.4 30169.4 30240.1

Pm Mean 975.5 977.3 977.1 973.2 975.5 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

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150

CLIMATOLOGICAL SUMMARY TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : June Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 975.0 977.0 976.9 973.5 975.1 02 975.0 976.8 976.9 973.5 976.0 03 975.3 977.5 977.3 973.4 974.9 04 975.5 977.4 977.2 974.2 976.1 05 975.9 977.6 977.3 973.4 974.7 06 974.9 976.0 976.3 972.3 974.1 07 973.6 975.6 975.5 971.5 973.2 08 972.6 974.1 974.1 970.6 973.4 09 973.2 975.2 975.2 971.1 973.3 10 973.3 974.4 974.3 970.7 973.0 11 974.1 975.4 975.5 971.5 974.3 12 974.3 976.0 975.3 971.6 973.8 13 973.4 974.8 974.9 971.5 974.0 14 973.5 974.9 975.6 971.9 973.8 15 973.7 974.9 974.6 970.6 973.2 16 972.8 974.6 975.1 971.2 973.3 17 972.6 974.5 974.6 971.5 973.6 18 973.4 974.8 974.8 971.1 973.3 19 973.4 974.8 974.9 970.8 972.9 20 972.1 973.4 973.2 969.4 971.2 21 971.0 972.2 971.8 968.4 970.5 22 970.7 971.8 971.5 968.6 971.5 23 971.7 972.8 973.0 970.5 972.2 24 972.1 973.4 974.0 970.7 972.8 25 972.3 973.3 973.1 977.4 972.3 26 971.6 973.0 973.3 970.1 972.8 27 972.7 974.6 974.7 971.2 974.3 28 974.5 975.5 975.7 971.6 974.0 29 973.7 975.0 974.9 971.7 973.6 30 973.0 974.4 974.1 971.4 973.8 31

TOTAL 29200.9 29245.7 29245.6 29146.9 29205.0

Pm Mean 973.4 974.9 974.9 971.6 973.5 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

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151

CLIMATOLOGICAL SUMMARY

TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : July Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 973.0 973.7 973.5 970.8 972.4 02 971.6 972.9 977.3 970.3 972.3 03 971.9 973.4 973.8 970.3 973.0 04 972.5 973.9 973.8 970.7 973.2 05 973.0 974.5 974.4 970.7 972.9 06 972.0 973.6 973.7 970.1 972.4 07 971.8 973.5 973.6 970.7 973.0 08 972.6 973.9 973.8 969.8 972.4 09 971.7 973.0 973.2 969.6 971.8 10 971.3 972.9 973.0 968.8 971.4 11 970.7 972.0 972.0 969.4 971.9 12 971.6 972.9 973.6 970.5 973.4 13 972.7 974.1 974.4 970.8 973.0 14 972.7 973.8 973.7 970.8 973.1 15 972.4 973.8 973.7 970.4 972.5 16 972.0 973.7 973.8 970.9 973.2 17 972.6 974.2 974.1 971.0 973.3 18 973.1 974.8 975.1 971.6 974.0 19 972.2 973.8 974.6 971.0 973.3 20 972.2 973.3 974.1 970.0 972.9 21 972.2 973.6 974.2 971.0 973.1 22 972.5 974.3 974.3 971.9 974.1 23 973.3 974.8 974.9 971.9 973.6 24 972.8 973.9 974.2 971.1 972.8 25 972.9 974.6 974.6 971.7 973.8 26 973.3 974.5 974.7 971.7 973.5 27 972.7 974.2 974.5 971.6 973.4 28 973.1 974.6 975.2 972.3 974.2 29 973.8 975.5 975.6 972.4 974.6 30 974.0 975.4 975.6 972.4 972.9 31 972.3 976.3 976.4 973.6 975.6

TOTAL 30146.5 30193.4 30203.4 30099.8 30167.0

Pm Mean 972.5 974.0 974.3 971.0 973.1 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

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152

CLIMATOLOGICAL SUMMARY TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : August Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 975.5 976.8 976.6 973.0 974.6 02 974.2 975.4 975.3 971.6 973.8 03 973.9 975.3 975.8 972.4 975.2 04 974.9 976.3 976.6 973.5 975.2 05 974.9 976.2 976.2 972.9 974.9 06 974.2 975.4 975.8 972.7 975.1 07 974.6 975.7 975.6 972.3 974.8 08 974.3 975.8 975.2 971.9 974.3 09 974.1 975.4 975.9 972.3 975.2 10 974.6 975.9 976.4 973.4 975.6 11 974.5 975.7 975.9 972.6 974.5 12 974.2 975.3 975.5 971.8 973.9 13 973.7 974.8 975.0 972.0 974.6 14 974.4 976.1 976.9 973.7 976.7 15 976.3 978.0 978.2 974.5 977.0 16 975.8 976.8 977.1 973.8 975.7 17 974.7 976.2 976.4 972.8 974.8 18 974.6 976.1 976.6 974.3 976.7 19 976.4 977.3 978.3 975.7 977.6 20 976.7 978.3 978.5 975.1 977.1 21 976.0 977.4 977.5 974.2 976.5 22 976.0 977.4 977.7 974.2 977.1 23 976.9 978.5 978.8 975.6 977.7 24 977.2 978.3 978.3 974.8 976.9 25 976.9 978.0 978.0 974.2 976.4 26 975.9 977.7 977.8 974.7 976.8 27 976.8 977.7 980.1 974.1 975.4 28 974.2 975.6 975.5 971.6 974.3 29 974.7 976.1 976.2 972.3 974.8 30 974.4 975.6 975.8 972.3 974.8 31 974.4 975.7 976.3 973.1 975.5

TOTAL 30229.9 30270.8 30279.8 30173.4 30243.5

Pm Mean 975.2 976.5 976.8 973.3 975.6 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

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153

CLIMATOLOGICAL SUMMARY

TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : September Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 975.8 977.6 977.8 974.7 977.4 02 976.8 978.2 978.4 975.1 981.6 03 977.5 978.7 978.8 976.4 978.5 04 978.2 979.5 979.6 976.0 978.6 05 977.8 979.2 979.3 975.9 978.2 06 976.9 978.7 978.9 975.5 977.7 07 977.3 979.0 979.4 976.6 978.8 08 978.9 980.1 980.3 977.1 979.3 09 978.6 979.8 979.8 977.2 978.2 10 977.5 979.0 979.0 976.0 977.9 11 977.8 979.2 979.4 976.0 978.5 12 978.1 979.9 979.6 977.0 979.0 13 978.4 979.8 979.8 976.9 979.5 14 978.9 980.5 980.7 977.8 979.1 15 978.7 980.3 980.5 977.0 978.9 16 978.3 979.9 980.0 976.7 978.9 17 978.5 979.8 980.1 976.8 978.9 18 978.7 980.3 980.5 977.5 979.9 19 980.1 981.7 981.9 978.9 981.5 20 981.0 982.5 982.4 979.6 981.5 21 981.2 982.8 983.0 979.0 981.2 22 981.3 982.9 983.0 979.5 981.3 23 981.1 983.0 983.1 979.5 981.7 24 980.8 982.6 982.5 979.2 981.5 25 981.4 982.5 982.9 979.1 981.3 26 981.4 983.3 983.6 980.0 982.1 27 981.9 981.5 983.6 970.0 982.1 28 982.2 983.7 983.6 980.1 982.0 29 982.3 984.5 983.6 980.0 982.4 30 982.0 983.5 983.5 980.1 982.3 31

TOTAL 29379.4 29424.0 29428.6 29321.2 29399.8

Pm Mean 979.3 980.8 981.0 977.4 980.0 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

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154

CLIMATOLOGICAL SUMMARY TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : October Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 982.2 983.6 983.9 980.5 983.0 02 982.8 984.4 985.2 980.7 978.6 03 981.9 983.5 983.5 979.9 981.9 04 982.0 983.9 984.1 980.5 982.6 05 982.2 984.3 984.3 981.5 982.9 06 983.2 984.8 984.8 981.6 983.5 07 983.4 985.0 984.8 981.5 983.3 08 983.3 985.1 984.9 981.2 982.7 09 982.4 984.1 984.1 980.8 982.7 10 983.1 985.1 984.7 981.3 982.9 11 983.0 984.5 984.6 981.0 982.3 12 982.5 984.4 984.6 981.4 983.3 13 983.4 985.3 985.2 981.9 983.4 14 983.4 985.3 985.0 981.6 983.2 15 983.7 985.5 985.4 982.7 984.2 16 983.7 985.5 985.3 981.9 983.7 17 982.7 984.1 983.8 980.7 982.1 18 981.1 982.4 982.5 977.9 981.4 19 981.1 983.0 983.1 980.5 982.1 20 981.9 984.0 984.1 982.0 983.8 21 983.3 984.9 984.2 982.1 983.7 22 983.7 985.9 985.8 983.1 984.9 23 984.5 986.4 986.0 983.1 985.0 24 984.7 986.9 986.7 984.5 985.1 25 984.6 986.5 986.6 983.7 985.2 26 984.9 986.8 986.7 983.8 985.0 27 984.5 986.4 986.4 983.6 985.0 28 984.7 986.4 986.1 983.0 984.6 29 984.3 986.0 985.9 982.9 984.7 30 983.9 985.8 986.2 982.9 984.5 31 984.0 986.0 986.0 983.4 985.5

TOTAL 30480.1 30535.8 30534.5 30437.2 30486.8

Pm Mean 983.2 985.0 985.0 981.8 983.4 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

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155

CLIMATOLOGICAL SUMMARY

TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : November Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 985.7 987.5 987.5 984.9 986.9 02 986.9 989.1 989.1 986.0 987.4 03 986.8 988.9 988.7 985.5 987.0 04 986.2 988.1 988.1 985.7 986.8 05 986.2 988.1 988.2 985.2 986.7 06 985.8 988.0 987.9 985.8 987.5 07 986.6 988.9 989.0 985.8 987.5 08 987.3 988.9 988.9 986.3 987.9 09 987.4 988.9 988.8 986.1 987.4 10 987.0 989.0 988.8 986.0 987.6 11 987.5 989.4 989.5 986.3 987.8 12 987.2 988.8 989.0 985.4 987.6 13 986.8 988.5 988.5 985.4 986.9 14 986.6 988.7 988.5 985.8 987.1 15 986.6 988.5 988.9 986.9 988.5 16 988.0 989.9 989.9 986.8 988.1 17 987.3 793.3 989.5 986.5 987.5 18 987.0 988.5 988.7 985.6 986.9 19 986.5 988.4 988.3 985.3 987.0 20 986.8 989.0 989.1 986.5 988.2 21 987.8 990.0 989.9 987.1 988.7 22 987.9 989.9 992.3 987.3 988.8 23 988.2 990.3 990.5 987.0 988.4 24 987.3 989.2 989.5 987.0 988.0 25 987.6 989.0 989.1 986.2 987.6 26 987.2 989.3 989.6 986.9 988.4 27 987.9 990.1 990.5 987.8 988.9 28 988.5 990.6 990.6 987.4 988.9 29 988.5 990.4 990.7 987.6 989.2 30 988.5 990.6 990.8 988.0 989.5 31

TOTAL 29615.6 29477.8 29678.4 29590.1 29634.7

Pm Mean 987.2 982.6 989.3 986.3 987.8 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

Philips
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156

CLIMATOLOGICAL SUMMARY

TABLE – VI

Station : NEW DELHI (IGI) AIRPORT Latitude : 28o 34’ N Elevation : 233 metres above MSL

Month : December Longitude : 077° 07’ E

Period : 1998 - 2002

Mean monthly atmospheric pressure (in hPa) at the reference level/mean sea level (for low level stations) at the standard times for surface synoptic observation.

TIME IN UTC

DATE 0000 0300 0600 1200 1800

01 988.9 990.6 991.1 988.2 989.7 02 988.9 990.8 991.2 988.4 990.1 03 989.6 991.7 992.0 989.9 990.5 04 989.5 991.2 991.1 987.5 988.8 05 987.8 989.8 989.9 987.1 988.7 06 988.2 990.1 990.6 987.9 990.1 07 988.9 990.7 991.1 987.9 989.3 08 988.7 990.7 991.2 988.4 990.2 09 988.9 990.7 991.0 988.4 989.8 10 988.8 990.8 991.2 988.6 990.3 11 990.0 992.0 992.5 989.6 991.1 12 990.4 992.4 992.7 990.5 992.0 13 991.3 992.9 992.9 990.0 991.3 14 990.3 992.1 992.3 989.5 990.8 15 989.8 991.3 991.6 988.6 989.8 16 989.5 991.5 992.0 989.1 990.4 17 989.4 991.1 991.7 988.8 989.9 18 988.1 989.6 990.7 987.7 989.4 19 988.5 990.3 991.0 988.1 989.3 20 988.5 990.1 990.8 987.9 989.4 21 988.8 990.5 991.0 988.4 990.2 22 989.9 991.9 992.3 989.6 991.1 23 990.0 991.9 992.3 989.1 990.5 24 991.0 991.9 992.5 989.4 991.0 25 990.0 991.7 992.3 989.6 991.0 26 990.1 991.9 992.5 989.9 991.0 27 990.2 991.9 992.8 990.2 991.8 28 990.9 992.9 993.4 989.8 992.0 29 990.7 992.0 991.9 989.3 990.3 30 988.9 990.5 990.9 988.3 989.5 31 988.3 989.8 990.4 988.0 990.3

TOTAL 30672.8 30727.3 30740.9 30653.7 30699.6

Pm Mean 989.4 991.2 991.6 988.8 990.3 • Required only if summary refers to a station at an international aerodrome Notes

a) The pressure observations (expressed in hPa) reduced to the reference level / msl upon which the above table is based, are those made at the meteorological pressure observation site at the station

b) An entry in the column headed Pm gives the mean reference level / m.s.l. pressure for the specified month and the specified time.

T A

B L

E - V

I

Philips
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