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Printed from: http://www.hillsboroughcounty.org./emergency/hurricaneinfo/saffirsimpson.cfm on 11/22/2009

Saffir-Simpson Chart
 

Based upon their intensity, hurricanes are categorized on the Saffir-Simpson Hurricane Scale
of one to five. One is a "minimal" storm and five is the strongest.
Hurricanes Hugo and Andrew were category 4 hurricanes.

Category

Winds (MPH)

Surge (Feet)

Damage

Tropical Storm

40 - 73

0 - 3

Slight

1

74 - 95

4 - 5

Minimal

2

96 - 110

6 - 8

Moderate

3

111 - 130

9 - 12

Major

4

131 - 155

13 - 18

Destructive

5

156+

18+

Devastating

KEY PHRASES:

Hurricane effects: A hurricane is not a point; its effects cover a large area. Don't focus on just the eye or the storm track. Take the following into consideration:

  • Winds and rain extend a long distance from the center
  • There will be storm surge and higher than normal tides
  • There will be coastal flooding and beach erosion.

Wind and flood effects: If you live in a building (mobile or manufactured home), subject to wind damage or live in an area subject to flooding, you should have a plan and be ready to move to a safer location. If you live in a flood prone area or an exposed coastal area, you should evacuate to a shelter or higher ground.

Tropical Depression: Winds at a sustained speed of 38mph.

Tropical Storm: Sustained winds from 39mph to 73mph.

Gale force winds: sustained speed of 54mph