Fujita Scale

Rating Wind speed (mph) Damage
F-0 40-72 Light: Some chimney damage, broken tree branches, damaged sign boards.
F-1 73-112 Moderate: Mobile homes moved or overturned, roofing stripped off houses, moving autos pushed off roads.
F-2 113-157 Considerable: Mobile homes demolished; roofs torn from frame houses; large trees snapped or uprooted.
F-3 158-206 Severe: Roofs and most outer walls torn off even well-built houses; trains overturned.
F-4 207-260 Devastating: All houses leveled and some are blown some distance from their foundations; autos thrown through the air.
F-5 261-318 Incredible: Houses picked up and carried considerable distance in pieces, automobiles fly through the air farther than 100 yards; pavement removed from highways.