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%
|
