F2

F3

F4

Fujita Scale

Estimated wind speed (113-157)
Average damage path width (360-820ft)
Significant damage, roofs torn, mobile homes demolished, debris.

Estimated wind speed (158-206)
Average damage path width (655ft-1/3mile)
Severe damage, trains overturned, heavy cars lifted off the ground and thrown.

Estimated wind speed (207-260)mph
Average damage path width (1/4mile-1/2mile)
Devastating damage, cars thrown and missiles generated structures with weak foundations blown away.

(en.wikipedia.org/wiki/Fujita_scale)