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The Fujita Scale
The Fujita scale is the most common way of describing the strength of
a tornado. The different categories range from F0 to F5, wth the following
wind speeds:
F-0: 40-72 mph, chimney damage, tree branches broken
F-1: 73-112 mph, mobile homes pushed off foundation or overturned
F-2: 113-157 mph, considerable damage, mobile homes demolished, trees
uprooted
F-3: 158-206 mph, roofs and walls torn down, trains overturned, cars
thrown
F-4: 207-260 mph, well-constructed walls leveled
F-5: 261-318 mph, homes lifted off foundation and carried considerable
distances, autos thrown as far as 100 meters
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