"F0","Gale tornado (40-72 m.p.h.).  Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards.","",""
"F1","Moderate 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.","",""
"F2","Significant 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.","",""
"F3","Severe 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.","",""
"F4","Devastating tornado (207-260 m.p.h.).  Well-constructed houses leveled; structures with weak foundations blown off some distance; cars thrown and large missiles generated.","",""
"F5","Incredible 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.","",""
"","Fujita Tornado Scale.","Source: T. Theodore Fujita, J. Atmos. Sci., August 1981, p. 1517-1519.",""