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tornadoes

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by

Casey D

on 1 March 2013

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Transcript of tornadoes

Tornadoes What is a tornado? How do tornadoes form?
Tornadoes are formed by thunderstorms and the wind on the ground and the wind in the air. Then the two winds combine and form a tornado of mass destruction. How powerful is a tornado?
The strength of a tornado is measured by the wind speed. F0 is 40-72mph, F1 is 73 -112mph, F2 is 113-157mph, F3 is 158-206mph, F4 is 207-260mph, F5 is 261-518mph How powerful is a tornado?
The strength of a tornado is measured by the wind speed. F0 is 40- 72mph,F1 is 73 -112mph, F2 is 113-157mph, F3 is 158-206mph, F4 is 207-260mph, F5 is 261-518mph Three deadliest U.S.A. Tornadoes:
Tri-state tornado
Natchez tornado casey
St. Louis tornado
Three deadliest U.S.A. Tornadoes.
Tristate tornado
Natchez tornado
ST. Louis tornado Where do Tornadoes come from?

A tornado is formed when warm wet air meets cool dry air high in the sky. The worst is a .F5 tornado Bangladesh killed 1,300 people and injured 12,000 homeless people in Canada tornadoes
are cool tornado Sources
Tornado alert
author: Frank Bradley Hurricanes and Tornadoes author:Norman Barrett Extreme Weather author:Michael Mogil tornadoes by:Casey O O
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