SAFFIR SIMPSON HURRICANE WIND SCALE | |
CATEGORY | 1-minute average windspeeds |
I | 64 to 82 knots |
II | 83 to 95 knots |
III | 96 to 112 knots |
IV | 113 to 136 knots |
V | 137 knots or higher |
Windspeeds below hurricane strength are categorised as follows | |
Tropical depression | Less than 34 knots |
Tropical storm | 35 to 63 knots |
AUSTRALIAN CATEGORIES for TROPICAL CYCLONES | |||
Category | 10-minute average windspeeds | Description of sustained winds | Windspeeds in gusts |
1 | 34 to 47 knots | GALES | 90 - 125 km/h |
2 | 48 to 63 knots | DESTRUCTIVE | 125 - 164 km/h |
3 | 64 to 84 knots | VERY DESTRUCTIVE | 165 - 224 km/h |
4 | 85 to 115 knots | 225 - 279 km/h | |
5 | 116 knots and higher | 280 km/h and higher |
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