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09-20 09_20.JPG |
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| Title: | FEATURES OF AN EXTRATROPICAL CYCLONE |
| Caption: | This NASA Geostationary Observational Environmental Satellite (GOES) image shows the comma-shaped cloud pattern of a mature extratropical cyclone moving across the eastern United States. Clouds in the comma head are formed by counterclockwise circulation of cold air around the cyclone. Sinking dry air behind a cold front forms the dry slot. The comma tail is created by thunderstorms and other clouds ahead of the cold front. (Courtesy John Jensenius/National Weather Service) |
| Keywords: | atmosphere, midlatitude cyclones, middle-latitude cyclones, warm fronts, cold fronts, clouds, precipitation |