Cyclone Classification
Category Strongest gusts km/h Typical effects
1
Tropical cyclone
Less than 125

Negligible house damage. Damage to some crops, trees, caravans. Craft may drag moorings.

2
Tropical cyclone
125 to 169

Minor house damage. Significant damage to signs, trees and caravans. Heavy damage to some crops. Risk of power failure. Small craft may break moorings.

3
Severe tropical cyclone
170 to 224

Some roof and structural damage. Some caravans destroyed. Power failures likely.

4
Severe tropical cyclone
225 to 279

Significant roofing loss and structural damage. Many caravans destroyed and blown away. Dangerous airborne debris. Widespread power failures.

5
Severe tropical cyclone
More than 280

Extremely dangerous with widespread destruction.