Fujita Tornado Damage Scale - wave3.com-Louisville News, Weather & Sports

Fujita Tornado Damage Scale

The most destructive tornadoes form from rotating thunderstorms called supercells, which also can produce damaging hail, frequent lightning, and heavy rain. But not every thunderstorm spawns a tornado. Scientists still don't fully understand the process, according to the National Weather Service.

Tornadoes are rated on the Fujita scale based on estimated wind speeds and damage.

The ratings are:

F0: Winds less than 73 mph. Light damage, including broken tree branches, damaged sign boards, some damage to chimneys.

F1: Winds 73-112 mph. Moderate damage. Roof surfaces peeled, mobile homes pushed off foundations or overturned, moving vehicles blown off roads.

F2: Winds 113-157 mph. Considerable damage. Roofs torn off frame houses, mobile homes demolished, large trees snapped or uprooted, light-object missiles generated, cars lifted off the ground.

F3: Winds 158-206 mph. Severe damage. Roofs and some walls torn off well-constructed houses, trains overturned, heavy cars lifted off the ground and thrown.

F4: Winds 207-260 mph. Devastating damage. Well-constructed houses leveled, structures with weak foundations blown some distance, cars thrown and large missiles generated.

F5: Winds 261-318 mph. Incredible damage. Strong frame houses leveled off foundations and swept away, automobile-sized missiles fly through the air in excess of 109 yards, trees debarked.

(Copyright 2005 by The Associated Press.  All Rights Reserved.)

Powered by Frankly