| 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 |