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*Most if not all of these pages are java based. We apologize for any inconveniences this may cause to your older browsers.*
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Fujita Scale damage descriptionsThe Fujita Scale uses numbers from 0 through 5 and the ratings are based on the amount and type of wind damage. The scale had been calculated through F-12, which is Mach 1 - the speed of sound (750 mph) - but tornado wind speeds are not expected to reach these speeds; see the F-6 description below. F-0 Gale tornado (40-72 mph): Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards. F-1 Moderate tornado (73-112 mph): The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached garages may be destroyed. F-2 Significant tornado (113-157 mph): Considerable damage. Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light object missiles generated. F-3 Severe tornado (158-206 mph): Roof and some walls torn off well-constructed houses; trains overturned; most trees in forest uprooted. F-4 Devastating tornado (207-260 mph): Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated. F-5 Incredible tornado (261-318 mph): Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air in excess of 100 meters; trees debarked; steel-reinforced concrete structures badly damaged. F-6 Inconceivable tornado (319-379 mph): These winds are very unlikely. The small area of damage they might produce would probably not be recognizable along with the mess produced by F-4 and F-5 wind that would surround the F-6 winds. Missiles, such as cars and refrigerators would do serious secondary damage that could not be directly identified as F-6 damage. If this level is ever achieved, evidence for it might only be found in some manner of ground swirl pattern, for it may never be identifiable through engineering studies. F-0 and F-1 tornadoes are considered "weak," F-2 and F-3 are "strong" and F-4 and F-5 are "violent." The Fujita-Pearson Scale adds categories to include path length and path width. |
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