The Fujita Scale was developed in 1971 by Tetsuya Fujita as a way to measure the intensity of a tornado – how much it eats. In 1999, after the May 3rd tornado in Oklahoma, the Fujita Scale was enhanced. The table below shows the new and enhanced scale.
|EF-0||Light Damage. Wind 65 to 85 mph.
Causes some damage to siding and shingles
|EF-1||Moderate Damage. Wind 86 to 110 mph.
Considerable roof damage. Winds can uproot trees and
overturn single-wide mobile homes. Flagpoles bend.
|EF-2||Considerable Damage. Wind 111 to 135
mph. Most single-wide mobile homes destroyed. Permanent
home can shift off of foundation. Flagpoles collapse.
Softwood trees debarked.
|EF-3||Severe Damage. Wind 136 to 165 mph.
Hardwood trees debarked. All but small portions of houses
|EF-4||Devastating Damage. Wind 166 to 200
mph. Complete destruction of well-built houses and large
sections of school buildings.
|EF-5||Incredible Damage. Wind above 200 mph.
Significant structural deformation of mid and high-rise