Tornadoes
A tornado is a violently rotating column of air that rotates while in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. Wikipedia

 United States Government website about tornadoes....
http://www.ready.gov/tornadoes

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Weather Wiz Kid site:

http://www.weatherwizkids.com/weather-tornado.htm_

News Articles for Kids

"Tornadoes Devastate Midwest"
http://www.timeforkids.com/news/tornadoes-devastate-midwest/160496
"U.S. Tornado Season"
http://www.dogonews.com/2013/5/22/us-tornado-season-begins-with-a-massive-twister
"Miracle Kids Survive Tornado"​ 
​with firsthand video
http://www.nbcnews.com/news/us-news/miracle-kids-survive-tornado-gymnastics-studio-basement-n330741
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Realtime....
Click on the link below to see if there are any tornadoes watches
​happening right now?????

http://www.spc.noaa.gov/_

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See Some Examples