Fujita Tornado Intensity Scale
Fujita Tornado Intensity Scale |
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F0 - F1 |
F2 - F3 |
F4 - F5 |
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Weak Tornado |
Strong Tornado |
Violent Tornado |
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F0 |
40-72 mph |
Gale tornado Light damage. Some damage to chimneys; break branches off trees; push over shallow-rooted trees; damage sign boards. |
F1 |
73-112 mph |
Moderate tornado Moderate damage. The lower limit is the beginning of hurricane wind speed;peel surface off roofs; mobile homes pushed off foundations or overturned;moving autos pushed off the roads. |
F2 |
113-157 mph |
Significant tornado Considerable damage. Roofs torn off frame houses; mobile homes demolished;boxcars pushed over; large trees snapped or uprooted; light-object missilesgenerated. |
F3 |
158-206 mph |
Severe tornado. Severe damage. Roofs and some walls torn off well-constructed houses; trains overturned; most trees in forest uprooted; heavy cars lifted off the ground and thrown. |
F4 |
207-260 mph |
Devastating tornado Devastating damage. Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated. |
F5 |
261-318 mph |
Incredible tornado. Incredible damage. Strong frame houses lifted off foundations and carried considerable distance to disintegrate; automobile sized missiles fly through the air in excess of 100 meters(109 yds); trees debarked; incredible phenomena will occur. |
F6 |
319 mph - MACH
1 |
The maximum wind speeds of tornadoes are not expected to reach the F6 wind speeds. |
From TAMU |
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01/17/2009 |
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