SCALE |
WIND ESTIMATE (MPH) |
TYPICAL DAMAGE |
F0 |
<73 |
Light Damage. Some damage to chimneys; branches broken off trees; shallow-rooted trees pushed over; sign boards damage |
F1 |
73-112 |
Moderate Damage. Peels surface off roofs; mobile homes pushed off
foundations or overturned; moving autos blown off the road |
F2 |
113-157 |
Considerable Damage. Roofs torn off frame houses; mobile homes demolished; boxcars overturned; large trees snapped or uprooted; light weighted objects become missiles; cars lifted off the ground |
F3 |
158-206 |
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 |
Devastating damage. Well-constructed houses leveled; structures with weak foundations blown away some distance; cars thrown and large missiles generated. |
F5 |
261-318 |
Incredible damage. Strong frame houses leveled off foundations and swept away; automobile-sized missiles fly through the air in excess of 100 meters (109
yards); trees debarked; incredible phenomena will occur. |