F5

F6

Fujita Scale

Estimated wind speed (261-318)
Average damage path width (3/4mile or more)
Incredible damage, strong frame houses lifted off foundations, large objects carried considerable distances, very large debris size of vehicles, steel reinforced concrete structures damaged. Total destruction.

Estimated wind speed (> 319mph)
Average damage path width (3/4mi or more)
Intense damage, total destruction

(en.wikipedia.org/wiki/Fujita_scale)