| Fujita Scale |
(or F Scale) - A scale of tornado intensity in which wind speeds are inferred from an analysis of wind damage:
| Rating | Wind, Damage | | F0 (weak) | 40-72 mph, light damage | | F1 (weak) | 73-112 mph, moderate damage | | F2 (strong) | 113-157 mph, considerable damage | | F3 (strong) | 158-206 mph, severe damage | | F4 (violent) | 207-260 mph, devestating damage | | F5 (violent) | 260-318 mph (rare), incredible damage |
All tornadoes, and most other severe local windstorms, are assigned a single number from this scale according to the most intense damage caused by the storm. |