| WIND-FORCE [Beaufort] |
Description | average wind-speed | ||
|---|---|---|---|---|
| m/s | knots | km/h | ||
| 0 | Calm | <0.2 | < 1 | < 1 |
| 1 | Light airs | 0.3 - 1.5 | 1 - 3 | 1 - 5 |
| 2 | Light breeze | 1.6 - 3.3 | 4 - 6 | 6 - 11 |
| 3 | Gentle breeze | 3.4 - 5.4 | 7 - 10 | 12 - 19 |
| 4 | Moderate | 5.5 - 7.9 | 11 - 16 | 20 - 28 |
| 5 | Fresh breeze | 8.0 - 10.7 | 17 - 21 | 29 - 38 |
| 6 | Strong breeze | 10.8 - 13.8 | 22 - 27 | 39 - 49 |
| 7 | Near gale | 13.9 - 17.1 | 28 - 33 | 50 - 61 |
| 8 | Gale | 17.2 - 20.7 | 34 - 40 | 62 - 74 |
| 9 | Severe gale | 20.8 - 24.4 | 41 - 47 | 75 - 88 |
| 10 | Storm | 24.5 - 28.4 | 48 - 55 | 89 - 102 |
| 11 | Violent storm | 28.5 - 32.6 | 56 - 63 | 102 - 117 |
| 12 | Hurricane | >32.6 | >63 | >117 |