CU-Boulder ATOC 1050 - ATOCclickers (2 pages)

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ATOCclickers



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ATOCclickers

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Pages:
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School:
University of Colorado at Boulder
Course:
Atoc 1050 - Weather and the Atmosphere
Weather and the Atmosphere Documents

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CLICKERS We would not expect a vertical motion or lifting along frontal boundaries all of the following are required for severe thunderstorm development vertical wind shear a source of moisture a mechanism to trigger an updraft a conditionally unstable atmosphere solar heating of the surface is the primary mechanism that triggers the updraft of an airmass thunderstorm airmass thunderstorms would be most likely to form far from any frontal boundaries at 4 00PM airmass thunderstorms tend to occur in environments where the winds do not increase substantially with height wind shear is a key environmental condition for severe thunderstorm formation because strong winds cause the updraft to tilt and separate from the downdraft allowing the inflow of warm moist air to continue to feed the storm cold pool the accumulation of rain cooled air near the surface under a thunderstorm a thunderstorm s anvil cloud is composed of ice crystals a gust front develops when cool air generated by evaporation of rain within the downdrafts spreads outward away from the thunderstorm after reaching the surface you are outdoors in spring in the central plains a supercell thunderstorm is traveling from southwest to northeast and passes directly over you this is the order you would observe the different precipitation types virga light rain moderate rain heavy rain hail a mechanism to trigger the thunderstorm updraft is required for a sever thunderstorm to form but is not required for a non severe thunderstorm to form supercell rotation develops as a result of tilting and stretching the rear flank gust front moves around the low pressure center associate with supercell thunderstorms analogously to a cold front in an extratropical cyclone mesocyclone refers to the rotating region of a supercell thunderstorm a supercell thunderstorm develops along a dry line associated with a cyclone an EF4 tornado emerges from the supercell a severe storm spotter observes suction vortices a suction vortex has the



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