FUJITA SCALE FOR TORNADOS ------------------------- Scale Number Wind Speed (mph/[kph]) Damage Type _____________________________________________________ F0 40- 73 [ 64-117] Light F1 74-112 [118-180] Moderate F2 113-157 [181-251] Considerable F3 158-206 [252-330] Severe F4 207-260 [331-417] Devastating F5 more than 261 [418] Incredible