Extreme Weather Events

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Lake Effect SnowLake Effect Snow: : Occurs when Cold winds blow across a warm lake and picks up moisture which results in heavy localized snow

NYS Lake Effect Snow 2003

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BLIZZARDBLIZZARD: : Is a severe snowstorm with strong sustained winds of 35mph for 3 hours or more

NYS Lake Effect Snow 2003

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Lake Effect Snow: Lake Effect Snow: Cold wind blows across a warm lake and picks up moisture.

NYS Lake Effect Snow 2003

New York State & Lake Effect Snow

Prevailing Winds

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Where in New York State?

Topography- elevation of the land on the eastern end of Lake Ontario increasesWhat does this do?

Questions from Pages 23-24Questions from Pages 23-24

1. The warmer the water temperature and the cooler the air temperature the greater the potential for lake effect snow

Questions from Pages 23-24Questions from Pages 23-24

2. Prevailing South westerly winds blow across the entire length of Lake Ontario picking up the most moisture as possible

Questions from Pages 23-24Questions from Pages 23-24

3. Orographic effect- as the air moves inland it is forced to climb the slopes of the Tug Hill Plateau

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Hurricane Development

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Forecasting hurricanes has evolved

What is a Hurricane?

• A tropical cyclone • Counter-clockwise circulation

around a Low-Pressure System.• Sustained winds exceeding 64

knots (74 mph) • Usually about 500km in

diameter

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HurricanesHurricanes

Occur late summer or early fallOccur late summer or early fall Form over _______________ __________Form over _______________ __________ Gain energy fromGain energy from

Lose energy when they go over ___________ Lose energy when they go over ___________ or ________________or ________________

Produce ______________, and ____________ Produce ______________, and ____________

Tropical (warm) watersthe condensation of millions of gallons of water vapor from solar evaporation

landCold water

Storm surge High winds

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What is a Hurricane?

• Usually about 350-500 miles in diameter

• Length or duration- a hurricane can last for 1- 2 weeks

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Hurricane far off shoreRough surf

hundreds of

miles away.

Storm Surge

Storm surge is a bulge of ocean water that piles up beneath the hurricane

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Hey! Let’s check out the

storm!

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