Winds speeds for tropical systems

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Tropical Depression

Winds: 20-34 knots (38 mph or less)
No storm surge

Tropical Storm

Winds: 35-64 knots (39 to 73 mph)
No storm surge

Hurricane Categories

Category 1
- Winds of 64-82 knots (74-95 mph)
- Storm surge 4 to 5 feet above normal
Category 2
- Winds of 83-95 knots (96-110 mph)
- Storm surge 6 to 8 feet above normal
Category 3
- Winds of 96-113 knots (111-130 mph)
- Storm surge 9 to 12 feet above normal
Category 4
- Winds of 114 to 135 knots (131-155 mph)
- Storm surge 13 to 18 feet above normal
Category 5
- Winds above 135 knots (155 mph)
- Storm surge more than 18 feet above normal

Tornado Scale

Hurricanes often spawn small tornadoes. Tornadoes are ranked in the Fujita Tornado Scale according to wind speed.

F-0: Up to 72-mph winds
F-1: 73-112-mph winds
F-2: 113-157-mph winds
F-3: 158-206-mph winds
F-4: 207-260-mph winds
F-5: 261 mph and above winds

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