CLASSIFICATION
THE AUSTRALIAN CYCLONE SCALE
| Category | Sustained Winds | |||
| km/h | m/s | mph | knts | |
| 1 | 63-90 | 17-25 | 39-56 | 34-48 |
| 2 | 91-125 | 26-34.5 | 57-78 | 49-68 |
| 3 | 126-165 | 35-45 | 79-102 | 69-88 |
| 4 | 166-225 | 46-62.5 | 103-140 | 89-121 |
| 5 | 226+ | 63+ | 141+ | 122+ |
THE SAFFIR SIMPSON SCALE (ATLANTIC HURRICANES)
| Saffir-Simpson Category |
Maximum sustained wind speed | Minimum surface pressure | Storm surge |
| m/s | mb | m | |
| 1 | 33-42 | > 980 | 1.0-1.7 |
| 2 | 43-49 | 979-965 | 1.8-2.6 |
| 3 | 50-58 | 964-945 | 2.7-3.8 |
| 4 | 59-69 | 944-920 | 3.9-5.6 |
| 5 | 70+ | < 920 | 5.7+ |