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in advance of usually eastward moving cold fronts.. A tornado is a violently rotating column of air extending Ammunition from a thunderstorm (Portlet RenderResponse API to the ground. Tornadoes cause an average of 70 fatalities and 1500 injuries. What Causes a Tornado? Tornadoes are most often spawned by giant thunderstorms.
The Fujita scale classifies tornadoes according to the damage they cause.. Tornado conditions are caused when different temperatures and humidity meet to form thunderclouds. In the United States, warm, wet winds from the Gulf of. Topic profile 
for "causes of tornados" by BoardReader. A tornado can cause major damage to environmental causes. A tornado can cause houses to be
thrown in the air, as well as people and automobiles.. Tornadoes cause a lot of debris to be blown
at very high speeds,. The high winds of a tornado National
can cause a roar that is often compared with the sound of a. This can last anywhere from a few minutes to more
than an hour, theboardman.org and during it a tornado WilliamShatner.com
often causes the most damage, and in rare cases can be more than one. It also serves as a reminder of the need for students everywhere to learn about tornadoes, their causes,
and the safety precautions that might save lives.. 
The tornado's Schools of swirling winds can exceed Book results