Scale devised in 1805 by Francis Beaufort to classify wind speed
Beaufort Scale |
Wind Description | Windspeed (mph) |
---|---|---|
0 | Calm | 0 |
1 | Light Air | 1-3 |
2 | Light Breeze | 4-7 |
3 | Gentle Breeze | 8-12 |
4 | Moderate Breeze | 13-18 |
5 | Fresh Breeze | 19-24 |
6 | Strong Breeze | 25-31 |
7 | Moderate Gale | 32-38 |
8 | Fresh Gale | 39-46 |
9 | Strong Gale | 47-54 |
10 | Whole Gale | 55-63 |
11 | Storm | 64-72 |
12 | Hurricane | >73 |