unit
of measure
conversions
equivalences
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italiano
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english
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atlantic
hurricanes and scale Saffir-Simpson
The
USA utilizes the Saffir-Simpson hurricane intensity
scale for the Atlantic and Northeast Pacific basins to give
an estimate of the potential flooding and damage to property
given a hurricane's estimated intensity.
|
Saffir-Simpson
category
|
max.
wind speed
|
min.
pressure
|
storm
surge
|
1
|
74-95
mph
|
33-42
m/s
|
64-82
kts
|
greter
than 980 mb
|
3-5
ft
|
1-1.7
m
|
2
|
96-110
mph
|
43-49
m/s
|
83-95
kts
|
979-965
mb
|
6-8
ft
|
1.8-2.6
m
|
3
|
111-130
mph
|
50-58
m/s
|
96-113
kts
|
964-945
mb
|
9-12
ft
|
2.7-3.8
m
|
4
|
131-155
mph
|
59-69
m/s
|
944-920
kts
|
944-920
mb
|
13-18
ft
|
3.9-5.6
m
|
5
|
156+
|
70+
|
136+
|
less
than 920 mb
|
19+
|
5.7+
|
hurricane's
damages
category
|
level
|
description
|
example
|
1
|
minimal
|
Damage
primarily to shrubbery, trees, foliage, and unanchored homes.
No real damage to other structures. Some damage to poorly
constructed signs. Low-lying coastal roads inundated, minor
pier damage, some small craft in exposed anchorage torn
from moorings.
|
hurricane
Earl (1998)
|
2
|
moderate
|
Considerable
damage to shrubbery and tree foliage; some trees blown down.
Major damage to exposed mobile homes. Extensive damage to
poorly constructed signs. Some damage to roofing materials
of buildings; some window and door damage. No major damage
to buildings. Coast roads and low-lying escape routes inland
cut by rising water 2 to 4 hours before arrival of hurricane
center. Considerable damage to piers. Marinas flooded. Small
craft in unprotected anchorages torn from moorings. Evacuation
of some shoreline residences and low-lying areas required.
|
hurricane
Georges (1998)
|
3
|
extensive
|
Foliage
torn from trees; large trees blown down. Practically all
poorly constructed signs blown down. Some damage to roofing
materials of buildings; some wind and door damage. Some
structural damage to small buildings. Mobile homes destroyed.
Serious flooding at coast and many smaller structures near
coast destroyed; larger structures near coast damaged by
battering waves and floating debris. Low-lying escape routes
inland cut by rising water 3 to 5 hours before hurricane
center arrives. Flat terrain 5 feet of less above sea level
flooded inland 8 miles or more. Evacuation of low- lying
residences within several blocks of shoreline possibly required.
|
hurricane
Fran (1996)
|
4
|
extreme
|
Shrubs
and trees blown down; all signs down. Extensive damage to
roofing materials, windows and doors. Complete failures
of roofs on many small residences. Complete destruction
of mobile homes. Flat terrain 10 feet of less above sea
level flooded inland as far as 6 miles. Major damage to
lower floors of structures near shore due to flooding and
battering by waves and floating debris. Low-lying escape
routes inland cut by rising water 3 to 5 hours before hurricane
center arrives. Major erosion of beaches. Massive evacuation
of all residences within 500 yards of shore possibly required,
and of single- story residences within 2 miles of shore.
|
hurricane
Andrew (1992)
|
5
|
catastrophic
|
Shrubs
and trees blown down; considerable damage to roofs of buildings;
all signs down. Very severe and extensive damage to windows
and doors. Complete failure of roofs on many residences
and industrial buildings. Extensive shattering of glass
in windows and doors. Some complete building failures. Small
buildings overturned or blown away. Complete destruction
of mobile homes. Major damage to lower floors of all structures
less than 15 feet above sea level within 500 yards of shore.
Low-lying escape routes inland cut by rising water 3 to
5 hours before hurricane center arrives. Massive evacuation
of residential areas on low ground within 5 to 10 miles
of shore possibly required.
|
hurricane
Camille (1969)
|
other
scale of classification for tornado hurricane cyclone
|
|
 
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23.03.08
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