The Fujita Scale

The Fujita scale is the most common way of describing the strength of a tornado. The different categories range from F0 to F5, wth the following wind speeds:

F-0: 40-72 mph, chimney damage, tree branches broken

F-1: 73-112 mph, mobile homes pushed off foundation or overturned

F-2: 113-157 mph, considerable damage, mobile homes demolished, trees uprooted

F-3: 158-206 mph, roofs and walls torn down, trains overturned, cars thrown

F-4: 207-260 mph, well-constructed walls leveled

F-5: 261-318 mph, homes lifted off foundation and carried considerable distances, autos thrown as far as 100 meters

Concept Mapping Toolkit
Insitute for Human and Machine Cognition
The University of West Florida