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TORNADO WIND SCALE

The Storm Prediction Center has a brief description of the new Enhanced Fujita Scale.
Here's the full report submitted by the Wind Science and Engineering Center at Texas Tech University in PDF format.
A modification of the original Fujita Scale developed by "Dr. Tornado", T. Theodore Fujita of the University of Chicago.

New EF Scale: Old F-Scale: Typical Damage:

EF0 (65-85 mph) F0 (65-73 mph) Light damage: Peels surface off some roofs; some damage to gutters or siding; branches broken off trees; shallow-rooted trees pushed over.

EF1 (86-110 mph) F1 (73-112 mph) Moderate damage: Roofs severely stripped; mobile homes overturned or badly damaged; loss of exterior doors; windows and other glass broken.

EF2(111-135 mph) F2 (113-157 mph) Considerable damage: Roofs torn off well-constructed houses; foundations of frame homes shifted; mobile homes completely destroyed; large trees snapped or uprooted; light-object missiles generated; cars lifted off ground.

EF3 (136-165 mph) F3 (158-206 mph) Severe damage: Entire stories of well-constructed houses destroyed; severe damage to large buildings such as shopping malls; trains overturned; trees debarked; heavy cars lifted off the ground and thrown; structures with weak foundations blown away some distance.

EF4 (166-200 mph) F4 (207-260 mph) Devastating damage: Whole frame houses Well-constructed houses and whole frame houses completely leveled; cars thrown and small missiles generated.

EF5 (>200 mph) F5 (261-318 mph) Incredible damage: Strong frame houses leveled off foundations and swept away; automobile-sized missiles fly through the air in excess of 100 m (109 yd); high-rise buildings have significant structural deformation; incredible phenomena will occur.

EF No rating F6-F12 (319 and above) Inconceivable damage. Should a tornado with the maximum wind speed in excess of F5 occur, the extent and types of damage may not be conceived. A number of missiles such as iceboxes, water heaters, storage tanks, automoblies, etc.will create serious secondary damage on structures.


HURRICANE WIND SCALE

Tropical Depression
Winds over 38 mph (33 knots, 62 km/h)

Tropical Storm
Winds 39-73 mph34 (63 knots, 63118 km/h)

Category One Hurricane
74-95 mph (82 knots, 119153 km/h

Category Two Hurricane
96-110 mph (8395 knots, 154177 km/h)

Category Three Hurricane
111-129 mph (96112 knots, 178208 km/h)

Cateory Four Hurricane
130-156 mph (113136 knots, 209251 km/h)

Category Five Hurricane
157+ mph (137 knots, 252 km/h)


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Huntington, West Virginia, weather forecast