MET4300_SWX_LEC12

MET4300_SWX_LEC12 - MET 4300 Lecture 12 Extratropical...

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MET 4300 Lecture 12 Extratropical Cyclones East of the Rockies
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Extratropical Cyclones Large swirling storm systems that form along the jetstream between 30 and 70 degree latitude Parent storm of severe weather Life span: several days to well over a week Dimension: several hundred to a thousand mile Transporting warm air northward and upward Seasons: mainly in late fall, winter, and spring providing beneficial rainfall for agriculture Shape on satellite image: Comma tail: squall lines, thunderstorms head: heavy rain, heavy snow, freezing rain
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Where Do US Frontal Cyclones Form? Lee of the Rocky Mountains Alberta Colorado Wyoming, New Mexico Gulf Coast TX-LA boarder Off Georgia- Carolinas Coast Bering Sea & Gulf of Alaska in the Pacific Ocean
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Northern Plains Cyclone, Temperature
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Northern Plains Cyclone, Dew Point
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Jet Max (or Jetstreak) passes over the Mounains strongest cyclones
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Vorticity Increase east of the Mountains
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West Wind Over the Mountains Flow starts to deepen just a bit before the mountain Initially turns cyclonically
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MET4300_SWX_LEC12 - MET 4300 Lecture 12 Extratropical...

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