#earthscience #meteorology #physics 

The Fujita scale (шкала Фудзиты) is a scale for rating [[tornado]] intensity, based primarily on the damage tornadoes inflict.
Created by Ted Fujita in 1971.

| Fujita number | Speed                             | Damage       |
| ------------- | --------------------------------- | ------------ |
| F0            | < 73 mph<br>< 32.6 m/s            | Light        |
| F1            | 73 - 112 mph<br>32.6 - 50 m/s     | Moderate     |
| F2            | 113 - 157 mph<br>50.4 - 70 m/s    | Considerable |
| F3            | 158 - 206 mph<br>70.5 - 92 m/s    | Severe       |
| F4            | 207 - 260 mph<br>92.3 - 116.1 m/s | Devastating  |
| F5            | 261 - 318 mph<br>116.5 - 142 m/s  | Incredible   |
## Calculation
Formulae for [[wind speed]]:
$\LARGE v=14.1(F+2)^{1.5}$ mph = $\LARGE 6.30(F+2)^{1.5}$ m/s

Relation with the [[Beaufort scale]]:
![[Pasted image 20240613003211.png]]
Originally the Fujita scale was supposed to have 12 numbers, with the F0 matching B11 and F1 matching B12, but later the idea was abandoned in favour of a 6-number F0-F6 scale.