| BF | Description | km/h |
|---|---|---|
| 0 | Calm | < 1 |
| 1 | Light Air | 1 – 5 |
| 2 | Light Breeze | 6 – 11 |
| 3 | Gentle Breeze | 12 – 19 |
| 4 | Moderate Breeze ⚠ | 20 – 28 |
| 5 | Fresh Breeze | 29 – 38 |
| 6 | Strong Breeze | 39 – 49 |
| 7 | Near Gale | 50 – 61 |
| 8 | Gale | 62 – 74 |
| 9 | Strong Gale | 75 – 88 |
| 10 | Storm | 89 – 102 |
| 11 | Violent Storm | 103 – 117 |
| 12 | Hurricane | ≥ 118 |