Hurricane Intensity Scale

Hurricanes are rated in intensity on the Saffir-Simpson Hurricane Scale. This scale rates hurricanes by their wind speed, barometric pressure, storm surge height, and damage potential.

Category Wind Speed Barometric Pressure Storm Surge Damage Potential
1
(Weak)
74 - 95 mph
65 - 82 kts
28.94" or more
980.02 mb or more
4.0' - 5.0'
1.2 m - 1.5 m
Minimal damage to vegetation
2
(Moderate)
96 - 110 mph
83 - 95 kts
28.50" - 28.93"
965.12 mb - 979.68 mb
6.0' - 8.0'
1.8 m - 2.4 m
Moderate damage to houses
3
(Strong)
111 - 130 mph
96 - 113 kts
27.91" - 28.49"
945.14 mb - 964.78 mb
9.0' - 12.0'
2.7 m - 3.7 m
Extensive damage to small buildings
4
(Very strong)
131 - 155 mph
114 - 135 kts
27.17" - 27.90"
920.08 mb - 944.80 mb
13.0' - 18.0'
3.9 m - 5.5 m
Extreme structural damage
5
(Devastating)
Greater than 155 mph
Greater than 135 kts
Less than 27.17"
Less than 920.08 mb
Greater than 18.0'
Greater than 5.5m
Catastrophic building failures possible