The Fujita Scale For Tornadoes
    Original F scale (1) Enhanced F scale (2)
Category Damage Wind speed (mph) 3-second gust (mph)
F-0 Light 40-72  65-85
F-1 Moderate 73-112 86-110
F-2 Considerable 113-157 111-135
F-3 Severe 158-207 136-165
F-4 Devastating 208-260 166-200
F-5 Incredible 261-318 Over 200
(1) Original scale: wind speeds represent fastest estimated speeds over one quarter of a mile. (2) Enhanced scale: wind speeds represent maximum 3-second gusts. Source: U.S. Department of Commerce, National Oceanic and Atmospheric Administration.