Storm Surge and the Saffir-Simpson
Winds: 74-95 mph
Surge: 4 to 5
An abnormal rise of sea along a shore as the result,
primarily, of the winds from a storm.
Surge: 6 to 8
No real damage to building structures. Damage
primarily to unanchored mobile homes, shrubbery and trees. Also, some
coastal road flooding and minor pier damage.
Surge: 9 to 12
Some roofing material, door, and window damage of
buildings. Considerable damage to shrubbery and trees with some trees blown
down. Considerable damage to mobile homes and piers. Small craft in
unprotected anchorages break moorings.
Some structural damage to small residences and utility
buildings with a minor amount of curtainwall failures. Damage to shrubbery
and trees with foliage blown off trees and large trees blown down. Mobile
homes are destroyed. Flooding near the coast destroys smaller structures
with larger structures damaged by battering of floating debris.
Winds: More than
than 18 feet
More extensive curtainwall failures with some complete
roof structure failures on small residences. Shrubs, trees and most signs
are blown down. Complete destruction of mobile homes. Extensive damage to
doors and windows. Major damage to lower floors of structures near the
Massive evacuation of residential areas on low ground
within 5-10 miles (8-6 km) of the shoreline may be required. These surge
values are averages for these storm categories. Actual surge depths and
damage may be much greater.