Fujita Tornado Damage Scale

F-Scale Number Wind Speed (mph) Damage Description Frequency Average
F0 40-72 Some damage to chimneys; branches broken off trees; shallow-rooted trees pushed over; sign boards damaged. 29%
F1 73-112 Peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos blown off roads. 40%
F2 113-157 Roofs torn off frame houses; mobile homes demolished; boxcars overturned; large trees snapped or uprooted; light-object missiles generated; cars lifted off ground. 24%
F3 158-206 Roofs and some walls torn off well-constructed houses; trains overturned; most trees in forest uprooted; heavy cars lifted off the ground and thrown. 6%
F4 207-260 Well-constructed houses leveled; structures with weak foundations blown away some distance; cars thrown and large missiles generated. 2%
F5 261-318 Strong frame houses leveled off foundations and swept away; automobile-sized missiles fly through the air in excess of 100 meters (109 yds); trees debarked; incredible phenomena will occur. <1%

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