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en.wikipedia.org/wiki/Tornado

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

stormaware.mo.gov/tornado-facts-history

Learn basic tornado facts and review Missouri's tornado history.

www.weatherwizkids.com/weather-tornado.htm

Tornadoes What is a tornado? A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable ...

www.nationalgeographic.com/environment/natural-disasters/tornadoes

"Tornado Alley," a region that includes the area in the eastern state of South Dakota, Nebraska, Kansas, Oklahoma, northern Texas, and eastern Colorado, ...

www.nssl.noaa.gov/education/svrwx101/tornadoes

Basic information about tornadoes, from the NOAA National Severe Storms Laboratory.

news.nationalgeographic.com/2015/05/150511-tornadoes-storms-midwest-weather-science

May 11, 2015 ... A tornado lowers to the ground near Chickasha, Oklahoma, on May 6. May and June tend to have more tornadoes than any other months in ...

study.com/academy/lesson/what-are-tornadoes-definition-causes-the-enhanced-fujita-scale.html

Tornadoes are dangerous storms that affect millions of people. In this video lesson, you will learn how and where they form, as well as how...

blog.metoffice.gov.uk/2013/05/21/what-are-tornadoes

May 21, 2013 ... Tornadoes form as air starts to spin due to winds at different heights blowing at different speeds, creating wind shear. This causes the air to start ...

www.wunderground.com/resources/education/tornadoFAQ.asp

No other weather phenomenon can match the fury and destructive power of tornadoes. Tornadoes can be strong enough to destroy large buildings, leaving only ...