| The Enhanced Fujita Tornado Scale is a refinement of the original Fujita Scale, developed by T. Theodore Fujita in the late 1960's.
Both scales are based on estimates of 3-second gust wind speed from damage. |
Number |
Wind speed range |
Approximate Damage level (original Fujita Scale) |
| 0 |
65 - 85 mph |
light: broken tree branches. |
| 1 |
86 to 110 mph |
moderate: broken trees and windows. |
| 2 |
111 to 135 mph |
considerable: large trees uprooted and weak buildings destroyed. |
| 3 |
136 to 165 mph |
severe: stand of trees completely destroyed, cars overturned, some building walls destroyed. |
| 4 |
166 to 200 mph |
devastating: entire buildings completely destroyed. |
| 5 |
over 200 mph |
incredible: strong, steel-reinforced structures have considerable damage or are completely
destroyed, objects as large as cars moved over 100 meters. |