| F-SCALE | WINDS | TYPE OF DAMAGE | FREQUENCY |
|---|---|---|---|
| F0 | 40-72 mph 64-116 km/h | MINIMAL DAMAGE: Some damage to chimneys, TV antennas, roof shingles, trees, and windows. | 29% |
| F1 | 73-112 mph 117-180 km/h | MODERATE DAMAGE: Automobiles overturned, carports destroyed, trees uprooted. | 40% |
| F2 | 113-157 mph 181-253 km/h | MAJOR DAMAGE: Roofs blown off homes, sheds and outbuildings demolished, mobile homes overturned. | 24% |
| F3 | 158-206 mph 254-332 km/h | SEVERE DAMAGE: Exterior walls and roofs blown off homes. Metal buildings collapsed or are severely damaged. Forests and farmland flattened. | 6% |
| F4 | 207-260 mph 333-418 km/h | DEVASTATING DAMAGE: Few walls, if any, standing in well-built homes. Large steel and concrete missiles thrown far distances. | 2% |
| F5 | 261-318 mph 419-512 km/h | INCREDIBLE DAMAGE: Homes leveled with all debris removed. Schools, motels, and other larger structures have considerable damage with exterior walls and roofs gone. Top stories demolished. | less than 1% |