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by callie988
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Tornadoes are associated with large (supercell) thunderstorms. A column of warm humid air will begin to rise very quickly. One way the rotation appears to happen is when winds at two different altitudes blow at two different speeds creating wind shear. This causes a horizontal rotating column of air. If this column gets caught in a supercell updraft, the updraft tightens the spin and it speeds up (much like a skater's spins faster when arms are pulled close to the body. A funnel cloud is created. Then, the rain and hail in the thunderstorm cause the funnel to touch down creating a tornado.

CitationsText:http://uncw.edu/smec/gk_fellows/Documents/MakeaTornado.http://www.idreamof.com/disaster/xenia/images/xenia_tornado.jpgVideo:http://www.youtube.com/watch?v=tuw_4b0lt20&feature=relatedPictures:http://www.rondianetyler.com/images/tornado_pic.jpghttp://www.arthursclipart.org/nature/nature/tornado%203.http://www.pisitoenmadrid.com/fotolog/images/20080621110847_tornado-iowa.jpg

The biggest and most destructive tornado in the United States struck on March 18, 1925

FEMA has several tips regarding Tornado Safety!

WARNING: Tornado Zone Ahead!


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