Regional Gliding School

• Transition zone between Transition zone between different air masses.different air masses.

COLDCOLDAIRAIR

WARMWARMAIRAIRmixing zone

COLDCOLDAIRAIR

The leading edge of an advancing cold air mass.

SLOPE OF A COLD FRONT

1 MILE

50 MILES

The slope of the front is very steep (1 in 50)

Narrow weather band

Can be very severe

Regional Gliding School

• Clouds and weather– clouds of vertical development

– showers

– winds veer

– temperature decreases behind front

Fast moving cold fronts may produce severe thunderstorms and/or squall lines

Confirmation Stage

NOTE: You must use the buttons in the Confirmation Stage

Regional Gliding School

A

B

C

D

Shallow

Steep

Let's try a few review questions on Meteorology:

Question #1 - The slope of a cold front is .

Gradual

Vertical

MeteorologyMeteorologyFrontsFronts

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SLOPE OF A COLD FRONT

1 MI LE

50 MI LES

The slope of the front is very steep

Narrow weather band

Can be very severe

Regional Gliding School

A

B

C

D

Showers

Steady

Let's try a few review questions on Meteorology:

Question #2 - What precipitation can you expect at a cold front?

Mist

Continuous

MeteorologyMeteorologyFrontsFronts

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Regional Gliding School

• Clouds and weather– clouds of vertical development

– showers

– winds veer

– temperature decreases behind front

Fast moving cold fronts may produce severethunderstorms and/or squall lines

Regional Gliding School

The trailing edge of a retreating cold air massThe trailing edge of a retreating cold air massWarm air is forced aloft by “overrunning”Warm air is forced aloft by “overrunning”

WARMWARMAIRAIR

COLDCOLDAIRAIR

Regional Gliding School

Shallow slope (1 in 200)Wide weather band that may extend upto 500 milesExtensive stratiform cloud

FRONTAL SURFACE

150 - 200 MILES

1 MILE

Regional Gliding School

• Clouds and weather– stratus clouds

– steady precipitation

– winds veer

– temperature rises behind front

– thunderstorms may be embedded in the stratus clouds

– in winter, ice pellets and freezing rain may develop

Regional Gliding School

Sequence of clouds indicating the approach of warm front are:

• C cirrus

• C cirrostratus

• A altostratus

• Nnimbostratus

• S stratus

Regional Gliding School

TROWAL

• A cold front overtakes a warm front and lifts the warm air off the ground.

• Clouds and weather– combination of both warm front and cold front

weather.

A TRough Of Warm air ALoft

Regional Gliding School

Confirmation Stage

NOTE: You must use the buttons in the Confirmation Stage

Regional Gliding School

A

B

C

D

Transition point between fronts

Trough of warm air aloft

Let's try a few review questions on Meteorology:

Question #3 - What does the abbreviation TROWAL stand for?

Shallow slope

Occluded Fronts

MeteorologyMeteorologyFrontsFronts

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Regional Gliding School

TROWAL

• A cold front overtakes a warm front andlifts the warm air off the ground.

• Clouds and weather– combination of both warm front and cold front

weather.

A TRough Of Warm air ALoft

Regional Gliding School

A

B

C

D

Alto cumulus

Alto stratus

Let's try a few review questions on Meteorology:

Question #4 - What does the “A” in CCANS abbreviation indicate?

Altocumulus Castellanus

Cumulus

MeteorologyMeteorologyFrontsFronts

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Flying Scholarship Program

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Regional Gliding School

Sequence of clouds indicating theapproach of warm front are:

• C cirrus

• C cirrostratus

• A altostratus

• N nimbostratus

• S stratus

Regional Gliding School

Congratulations!!

You have now completed the Front lesson of the Meteorology Module. Of course, this lesson is always available to you for future reference if required.

You are now ready to move along to the next Meteorology lesson you have not completed or to any other module you wish. You can advance to the Self Test Module if you feel ready to challenge the final exam.

Good Luck!

MeteorologyMeteorologyAir MassesAir Masses