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Airmasses and Fronts

Finding fronts from temperature data: The animation of surface temperature in mid-December 2000 an arctic front associated with the high pressure on 10 December and cold and warm fronts associated with the low-pressure center that develops on 11 December.

Courtesy of Dept. of Atmospheric Sciences, University of Illinois at Urbana-Champaign

Finding fronts from dewpoint temperature data: A series of dewpoint temperature maps shows the leading edge of an arctic front as it makes its way southward into the United States from Canada on 10 December. Cold air behind an arctic front is dry (low dewpoint temperatures) because its origin is over land.

Courtesy of Dept. of Atmospheric Sciences, University of Illinois at Urbana-Champaign

Finding fronts from surface winds and satellite: Clouds along a cold front associated with a surface low are visible across the southeastern United States on 14 December. Note the kink in the isobar pattern south of the surface low identifying the cold front.

Courtesy of Dept. of Atmospheric Sciences, University of Illinois at Urbana-Champaign

Finding fronts from radar data: During the animation of national radar images, lines of thunderstorms and showers develop ahead of cold fronts on 11 December and again on 13 to 14 December.

Courtesy of Dept. of Atmospheric Sciences, University of Illinois at Urbana-Champaign

Related Web Sites
WW2010 Guide to Airmasses & Fronts Learn more about airmass and front identification from weather maps.
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Department of Atmospheric Sciences Severe and Hazardous Weather at Department of Atmospheric Sciences University of Illinois
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