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F0: winds 40-72 m.p.h. (Light damage) Branches broken off trees F1: winds 73-112 m.p.h. (Moderate damage) Trees snapped and mobile home pushed off foundations F2: winds 113-157 m.p.h. (Considerable damage) Mobile homes demolished and trees uprooted F3: winds 158-206 m.p.h. (Severe damage) Trains overturned and cars lifted off the ground F4: winds 207-260 m.p.h. (Devastating damage) Houses leveled and cars thrown some distance F5: winds 261-318 m.p.h. (Incredible damage) Houses lifted and thrown some distance |