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Geog. 110 Notes 7

Geog. 110 Notes 7 - -thunderstorms-characteristics basic...

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- thunderstorms: -characteristics: basic anatomy (forms in cumulonimbus cloud; top part of storm is called tropopause; updrafts associated w/ warm, moist air; downdrafts associated w/ heavy rain and cold downdraft; convergence of air at bottom of storm, divergence of air at top; lower pressures associated w/ thunderstorms); thunderstorm heights range from 20000 to 80000 ft. (what limits their vertical growth? the tropopause acts as a ceiling on unstable air, as the air above the tropopause is much warmer and more stable); thunderstorm severity correlates w/ thunderstorm height (the taller the storm, the more severe); thunderstorm movement is controlled by the large scale winds in the tropospheric column (in high wind shear situations, thunderstorms can tilt downstream); why do anvil heads usually spread out much more to the east as opposed to the west? winds typically blow in an eastward direction, so they will carry the anvil head farther east -stages of development-cumulus stage (mostly updraft), mature stage (both updraft and downdraft, heavy
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  • Spring '08
  • Storm, Thunderstorm, air mass thunderstorms, squall line, Air mass thunderstorm, biggest thunderstorm cells

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Geog. 110 Notes 7 - -thunderstorms-characteristics basic...

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