The Hydrologic Cycle and Wind
If it were not for the hydrologic cycle there would be no moisture in the air to form clouds. The process begins with the Earth’s water evaporating into the atmosphere. The moist air is lifted, cools then water vapor condenses and forms clouds. Precipitation returns to the Earth in the form of precipitation. Precipitation can fall as rain, sleet, or snow.
Wind direction affects the temperature and moisture conditions (Lutgens & Tarbuck, 2014, p. 436). High pressure systems and diverging winds cause dry conditions while low pressure systems and converging winds lead to precipitation.
Thunderstorms and Tornadoes
Tornadoes usually are spawned from supercell thunderstorms although supercells do not always generate tornadoes. Thunderstorm cells are very complex, unstable formations. Moist air gets trapped beneath a layer of cold, dry air. As the air becomes unstable, cumulus clouds begin to build up vertically sometimes as high as the tropopause. The clouds get to a point where they lose their buoyancy and this updraft subsides. If no vertical windshear is present the cloud will spread out like an anvil. If a vertical windshear exists then the anvil can spread out in a downshear direction. Updrafts can also penetrate the tropopause before collapsing. The droplets in the cloud can eventua...
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...able then one should take cover in the innermost part of the building or house.
Forbes, G. S., & Bluestein, H. B. (2001). Tornadoes, tornadic thunderstorms, and
photogrammetry: A review of the contributions by t. t.. Bulletin Of The American
Meteorological Society, 82(1), 73.
Lutgens, F. & Tarbuck, E. (2014). Foundations of earth science. (7th ed.) Upper Saddle River,
NJ: Pearson Education
National Weather Service. (2013). Top ten deadliest tornadoes in texas (since 1900). Retrieved
Ramon, A. (2011). Texas Tech's tornado simulator leads world in wind research. Retrieved
Texas Almanac. (n.d.) Texas is tornado capital. Retrieved from:
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