Интересная таблица (взята с буржуйского сайта)
m/s | kts | mph | km/h | Force | Description | Wave Height
------------------------------------------------------------------------
0 | 0.0 | 0.0 | 0.0 | 0 | Calm | Calm
1 | 1.9 | 2.2 | 3.6 | 1 | Light Air | Calm
2 | 3.9 | 4.5 | 7.2 | 2 | Slight Breeze | Smooth
3 | 5.8 | 6.7 | 10.8 | 2 | Slight Breeze | Smooth
4 | 7.8 | 8.9 | 14.4 | 3 | Gentle Breeze | Smooth
5 | 9.7 | 11.2 | 18.0 | 3 | Gentle Breeze | Smooth
6 | 11.7 | 13.4 | 21.6 | 4 | Moderate Breeze | Slight
7 | 13.6 | 15.7 | 25.2 | 4 | Moderate Breeze | Slight
8 | 15.6 | 17.9 | 28.8 | 4 | Moderate Breeze | Slight
9 | 17.5 | 20.1 | 32.4 | 5 | Fresh Breeze | Moderate
10 | 19.4 | 22.4 | 36.0 | 5 | Fresh Breeze | Moderate
11 | 21.4 | 24.6 | 39.6 | 6 | Strong Breeze | Rough
12 | 23.3 | 26.8 | 43.2 | 6 | Strong Breeze | Rough
13 | 25.3 | 29.1 | 46.8 | 6 | Strong Breeze | Rough
14 | 27.2 | 31.3 | 50.4 | 7 | Near Gale | Very Rough
15 | 29.2 | 33.6 | 54.0 | 7 | Near Gale | Very Rough
16 | 31.1 | 35.8 | 57.6 | 7 | Near Gale | Very Rough
17 | 33.0 | 38.0 | 61.2 | 7 | Near Gale | Very Rough
18 | 35.0 | 40.3 | 64.8 | 8 | Gale | High
19 | 36.9 | 42.5 | 68.4 | 8 | Gale | High
20 | 38.9 | 44.7 | 72.0 | 8 | Gale | High
21 | 40.8 | 47.0 | 75.6 | 9 | Strong Gale | Very High
22 | 42.8 | 49.2 | 79.2 | 9 | Strong Gale | Very High
23 | 44.7 | 51.5 | 82.8 | 9 | Strong Gale | Very High
24 | 46.7 | 53.7 | 86.4 | 9 | Strong Gale | Very High
25 | 48.6 | 55.9 | 90.0 | 10 | Storm | Very High
26 | 50.5 | 58.2 | 93.6 | 10 | Storm | Very High
27 | 52.5 | 60.4 | 97.2 | 10 | Storm | Very High
28 | 54.4 | 62.6 | 100.8 | 10 | Storm | Very High
29 | 56.4 | 64.9 | 104.4 | 11 | Violent Storm | Phenomenal
30 | 58.3 | 67.1 | 108.0 | 11 | Violent Storm | Phenomenal
31 | 60.3 | 69.3 | 111.6 | 11 | Violent Storm | Phenomenal
32 | 62.2 | 71.6 | 115.2 | 11 | Violent Storm | Phenomenal
33 | 64.1 | 73.8 | 118.8 | 12 | Hurricane | Phenomenal
34 | 66.1 | 76.1 | 122.4 | 12 | Hurricane | Phenomenal
35 | 68.0 | 78.3 | 126.0 | 12 | Hurricane | Phenomenal