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Properties of the Atmosphere
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Forecasting and Simulating Severe Weather
Atmospheric Stability
Forces and Force Balances
The Development of High- and Low-Pressure Systems
Airmasses and Fronts
Extratropical Cyclones Forming East of the Rocky Mountains
Extratropical Cyclones Forming Along the East and Gulf Coasts
Freezing Precipitation and Ice Storms
Lake Effect Snowstorms
Cold Waves
Great Plains Blizzards
Mountain Snowstorms
Mountain Windstorms
Thunderstorms
Tornadoes
Hailstorms
Lightning
Downbursts
El Niño, La Niña, and the Southern Oscillation
Tropical Cyclones
Floods
Drought
Heat Waves

Weather Maps

Temperature & Sea Level Pressure - The intensity of the storm is easily identified by the labeled isobars. Changes in temperature can be seen by the color contours. The coldest air is located on the north and west side of the cyclone. The counterclockwise airflow around the cyclone leads to a southward progression of cold air. Similarily, warm air is transported northward on the eastern side of the cyclone as it moves west to east across the country.

Department of Atmospheric Sciences Severe and Hazardous Weather at Department of Atmospheric Sciences University of Illinois