The enhanced fujita scale.
The Enhanced Fujita Scale Wind EF- Speed Scale Intensity (mph) Typical Damage (Suggested) EFO Gale Tornado 40 - 72 Tree branches broken, chimneys damaged, shallow-rooted trees pushed over; sign boards damaged or destroyed, outbuildings and sheds destroyed. EF1 Moderate 73 - 112 Roof surfaces peeled off, mobile homes pushed off foundations or overturned, moving autos pushed off the roads, garages may be destroyed. EF2 Significant 113 - 157 Roofs blown off frame houses; mobile homes demolished and/or destroyed, train boxcars pushed over; large trees snapped or uprooted; airborne debris can cause damage. EF3 Severe 158 - 206 Roofs and walls torn off well constructed houses; trains overturned; large trees uprooted, can knock down entire forest of trees. EF4 Devastating 207 - 260 Well-constructed frame houses leveled; structures with weak foundations blown off some distance; automobiles thrown, large airborne objects can cause significant damage. EFS Incredible 261 - 318 Brick, stone and cinder-block buildings destroyed, most debris is carried away by tornadic winds, large and heavy objects can be hurled in excess of 100 meters, trees debarked, asphalt peeled off of roads, steel reinforced concrete structures badly damaged. EF6 Inconceivable 319 - 379 Brick, stone and cinderblock buildings destroyed, most debris is carried away by tornadic winds, large and heavy objects can be hurled in excess of 100 meters, trees debarked, asphalt peeled off of roads, steel reinforced concrete structures badly damaged.
Typical EF0 Tornado Damage
Note The trees are stripped of leaves, but the trees remain standing. Only light roof damage and a few missing shingles.
Typical EF1 Tornado Damage
Note the uprooted trees and missing shingles from the roof. There is significant roof damage.
Typical EF2 Tornado Damage
This home is missing its entire roof but the exterior walls remain intact. Some of the stronger hardwood trees remain standing.
Typical EF3 Tornado Damage
This home is missing the entire roof as well as some of the exterior walls. Trees are blown over or snapped near the base and outbuildings are destroyed.
Typical EF4 Tornado Damage This home is almost completely obliterated, with no walls standing. The debris from the home is where the house once stood.
Typical EF5 Tornado Damage The asphalt surface has been peeled off of this road.
Typical EF5 Tornado Damage These homes have been completely removed from their original locations. The debris field has been scattered some distance from their foundation.
(All photographs courtesy of Brian Smith, Meteorologist, National Weather Service, Valley, NE)