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A.L.E.R.T.
Saffir-Simpson Hurricane Damage-Potential Scale

Saffir-Simpson Hurricane Damage-Potential Scale

This scale is used to estimate the possible damage a hurricane could do.

Scale Number

(Category)

Central Pressure

mb       in.

Winds

mi/hr    knots

Storm Surge

ft         m

Damage

1 >=980 >=28.94 74-95 64-82 4-5 ~1.5
some damage to trees, shrubbery, and unanchored mobile homes

2 965-979 28.50
-
28.91
96-110 83-95 6-8 ~2.0-2.5
major damage to mobile homes; damage buildings' roofs, and blow trees down

3 945-964 27.91
-
28.47
111-130 96-113 9-12 ~2.5-4.0
destroy mobile homes; blow down large trees; damage small buildings

4 920-944 27.17
-
27.88
131-155 114-135 13-18 ~4.0-5.5
blow down all signs; damage roofs, windows, and doors; completely destroy mobile homes; lower floors of structures near shore are damaged by flooding

5 <"920" <"27.17" >"155" >"135" >"18" >"5.5"
extensive damage to homes and industrial buildings; blow away small buildings; structures within 500 meters of shore on the lower floors which are less than 4.5 m (15 ft) above sea level are damaged