OPLDatabaseFile PV:`.Ar 3 pROM::BJ.WDR%P@F No. Desc.  2F0Gale tornado (40-72 m.p.h.). Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.F1Moderate tornado (73-112 m.p.h.). The lower limit is the beginning of hurricane wind speed; peels surfaces of roofs; mobile homes pushed off foundations or overturned; moving autos pushed off roads.F2Significant tornado (113-157 m.p.h.). Roofs torn off frame houses; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light-object missiles generated.F3Severe tornado (158-206 m.p.h.). Roofs and some walls torn off well-constructed houses; trains overturned; most trees in forest uprooted; heavy cars lifted off the ground and thrown.F4Devastating tornado (207-260 m.p.h.). Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.F5Incredible tornado (261-318 m.p.h.). Strong frame houses lifted off foundations and carried considerable distance to disintegrate; automobile-sized missiles fly through the air in excess of 100 m; trees debarked; incredible phenomena will occur.ISource >T. Theodore Fujita, J. Atmos. Sci., August 1981, p. 1517-1519.PV:`.Ar 3 pROM::BJ.WDR%P@F No. Desc.  2P:`.Ar 3 pROM::BJ.WDR%P@F No. Desc. 20P:`.Ar 3 pROM::BJ.WDR%P@F No. Desc.  2JFSource: T. Theodore Fujita, J. Atmos. Sci., August 1981, p. 1517-1519.`Fujita Tornado Scale.FSource: T. Theodore Fujita, J. Atmos. Sci., August 1981, p. 1517-1519.