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Hurricane Information
Why Talk About Hurricanes?
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Read the Disclaimer!
What Are Hurricanes, and What Causes Them?
Awareness Information
Plan for a Hurricane
If you are at risk from hurricanes:
How to Protect Your Property
Media and Community Education Ideas
What to Do During a Hurricane WATCH
What to Do During a Hurricane WARNING
What to Do if Evacuation Is Necessary
What to Do After a Hurricane
Hurricane Information
Terms
Saffir/Simpson
Hurricane Scale
There are no other storms like hurricanes on Earth. Views of hurricanes
from satellites located thousands of miles above the Earth show how these
powerful, tightly coiled weather systems are unique. Each year, on average,
10 tropical storms (of which six become hurricanes) develop over the Atlantic
Ocean, Caribbean Sea, or Gulf of Mexico. Many of these storms remain over
the ocean. However, an average of five hurricanes strike the United States
coastline every three years. Of these five, two will be major hurricanes,
which are storms of category 3 or higher on the Saffir-Simpson scale, which
corresponds to hurricanes with winds at or above 111 miles per hour.
Timely warnings have greatly diminished hurricane fatalities in the
United States. In spite of this, property damage continues to mount. There is
little we can do about the hurricanes themselves. However, the National
Oceanic and Atmospheric Administration's (NOAA's) Tropical
Prediction Center and National Weather
Service (NWS) field offices team up with other federal, state, and local
agencies; rescue and relief organizations; the private sector; and the news
media in a huge warning and preparedness effort.
 | Hurricanes and tropical storms are cyclones with tropical origins
(tropical cyclones). When the winds of a tropical storm (winds 39 to 73
miles per hour) reach a constant speed of 74 miles per hour or more, it is
called a hurricane. Hurricane winds blow in a large spiral around a
relatively calm center known as the "eye." The "eye" is
generally 20 to 30 miles wide, and the storm may have a diameter of 400
miles across. As a hurricane approaches, the skies will begin to darken and
winds will grow in strength. A hurricane can bring torrential rains, high
winds, and storm surge as it nears land. A single hurricane can last more
than two weeks over open waters and can run a path across the entire length
of the eastern seaboard.
 | More dangerous than the high winds of a hurricane is the storm surge -
a dome of ocean water that can be 20 feet high at its peak and 50 to 100
miles wide. The surge can devastate coastal communities as it sweeps
ashore. In recent years, the fatalities associated with storm surge have
been greatly reduced as a result of better warning and preparedness within
coastal communities.
 | Most deaths due to tropical cyclones are flood-related. Inland
flooding is a common occurrence with hurricanes and tropical storms.
Torrential rains from decaying hurricanes and tropical storms can produce
extensive urban and river flooding. Winds from these storms located offshore
can drive ocean water up the mouth of rivers, compounding the severity of
inland flooding. Inland streams and rivers can flood and trigger landslides.
Mudslides can occur in mountainous regions. In addition, hurricanes can
spawn tornadoes, which add to the destructiveness of the storm.
 | Learn about hurricane risk in your community by contacting your
local emergency management office, National Weather Service office, or American
Red Cross chapter. |
| | |
 | A National Weather Service WATCH is a message indicating that
conditions favor the occurrence of a certain type of hazardous weather. For
example, a severe thunderstorm watch means that a severe thunderstorm is
expected in the next six hours or so within an area approximately 120 to 150
miles wide and 300 to 400 miles long (36,000 to 60,000 square miles). The
NWS Storm Prediction Center issues such watches. Local NWS forecast offices
issue other watches (flash flood, winter weather, etc.) 12 to 36 hours in
advance of a possible hazardous-weather or flooding event. Each local
forecast office usually covers a state or a portion of a state.
 | An NWS WARNING indicates that a hazardous event is occurring or is
imminent in about 30 minutes to an hour. Local NWS forecast offices issue
warnings on a county-by-county basis.
 | A hurricane WATCH is issued when there is a threat of hurricane
conditions within 24 to 36 hours.
 | A hurricane WARNING is issued when hurricane conditions are
expected in 24 hours or less. |
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Many people do not realize the threat of hurricanes as each one is
different. Over the past several years, U.S. hurricane warning systems
have provided adequate time for people on barrier islands and the immediate
coastline to move inland when hurricanes threaten. However, due to rapid
population growth, it is becoming more difficult to evacuate people from the
barrier islands and other coastal areas because roads have not kept pace with
the expansion. The problem is further compounded by the fact that 80 to
90 percent of the population now living in hurricane-prone areas have never
experienced the core of a "major" hurricane. Many of these
people have been through weaker storms. The result is a false impression of a
hurricane's damage potential. This often leads to complacency and delayed
actions, which could result in the loss of many lives.
Develop a Family Disaster Plan. Please see the "Family
Disaster Plan" section for general family planning information.
Hurricane-specific planning should include the following:
 | Learn about your community's risk from hurricanes. Contact your
local emergency management office, local National Weather Service office, or
local chapter of the American Red Cross for more information on hurricanes
and how to prepare for them.
 | If your community is at risk from hurricanes, contact the local
emergency management office or planning and zoning office to find out if you
live in an area that could flood during a hurricane or heavy rains. If
you live in a risk area, learn what types of supplies should be stored to
protect your home from flood waters. Knowing the elevation of your property
in relation to nearby streams and dams will let you know if forecasted flood
levels will affect your home. |
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 | Talk to your insurance agent. Homeowners' policies do not cover
flooding from hurricanes. Ask about the National
Flood Insurance Program (NFIP).
 | Ask about your community's hurricane preparedness plan. The local
emergency management office or local chapter of the American Red Cross
should be able to provide you with details of this plan, including
information on the safest evacuation routes, nearby shelters, advice on when
schools would be closed and what conditions are necessary for recommended
evacuation of certain areas.
 | Develop an evacuation plan. Everyone in your family
should know where to go if they have to leave. Trying to make plans at the
last minute can be upsetting and create confusion.
 | Determine where to move your boat in an emergency. Marinas and
other storage facilities may fill up quickly. Some locations may have less
risk of damage than others. You may be required to secure your boat well in
advance of approaching hurricanes.
 | Discuss hurricanes with your family. Everyone should know what to
do in case all family members are not together. Discussing hurricanes ahead
of time will help reduce fear and anxiety, and lets everyone know how to
respond. Review flood safety and preparedness measures with your family. |
| | | |
Assemble a Disaster Supplies Kit
Please see the section "Disaster
Supplies Kit" for general supplies kit information. Hurricane-specific
supplies should include the following:
 | A week's supply of food and water (to be kept at home in addition to
the recommended three-day supply for your evacuation kit).
 | Disaster Supplies Kit basics.
 | Evacuation Supplies Kit. |
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 | Make a list of items to bring inside in the event of a storm. A
list will help you remember anything that can be broken or picked up by
strong winds. Hurricane winds, often in excess of 100 miles per hour, can
turn unanchored items into deadly missiles, causing damage or injury when
they hit.
 | Keep trees and shrubbery trimmed. Make trees more wind resistant by
removing diseased or damaged limbs, then strategically remove branches so
that wind can blow through. Hurricane winds frequently break weak limbs and
hurl them at great speed, causing great damage when they hit property.
Debris collection services may not be operating just before a storm, so it
is best to do this well in advance of approaching storms.
 | Remove any debris or loose items in your yard. Hurricane winds can
pick up anything unsecured, creating damage to property when the debris
hits.
 | Clear loose and clogged rain gutters and downspouts. Hurricanes
often bring long periods of heavy rain. Providing clear drainage will help
prevent misdirected flooding.
 | Install permanent hurricane shutters. Hurricane shutters provide
the best protection for your windows and doors. Taping windows could take
critical time from more effective preparedness measures. All tape does is
help prevent glass from broken windows from scattering all over inside. Tape
does not prevent windows from breaking. Cover the outside of windows with
shutters or plywood.
 | If you do not have permanent hurricane shutters, install anchors for
plywood (marine plywood is best) and predrill holes in precut half-inch
outdoor plywood boards so that you can cover the windows of your home
quickly. Mark which board fits which window. Note: Tape does not prevent
windows from breaking, so taping windows is not recommended. Most homes
destroyed during recent hurricanes had no window protection. When wind
enters a home through broken windows, the pressure builds against the walls
and can lift roofs, followed by collapsing walls.
 | Install protection to the outside areas of sliding glass doors.
Glass doors are as vulnerable as windows to breakage by wind-driven objects.
 | Well ahead of time, buy any other items needed to board up windows and
protect your home. When a hurricane threatens, supplies are quickly sold
out at many stores. Stock may not be replenished until after the storm.
 | Strengthen garage doors. Many houses are destroyed by hurricane
winds that enter through damaged garage doors, lifting roofs, and destroying
the remainder of the house.
 | Have an engineer check your home and advise about ways to make it more
resistant to hurricane winds. There are a variety of ways to protect
your home. Professionals can advise you of engineering requirements,
building permits or requirements of local planning and zoning departments to
provide the most effective protection.
 | Elevate coastal homes. Raising houses to a certain height will make
them more resistant to hurricane-driven waters. There may be many local
codes affecting how and where homes can be elevated. Meet with your
emergency manager or planning and zoning official for a description of the
process to have your home elevated. There may also be community funds
available for such measures.
 | If you live in a flood plain or are prone to flooding, also follow
flood preparedness precautions. Hurricanes can bring great amounts of
rain and frequently cause floods. Some hurricanes have dropped more than 10
inches of rain in just a few hours. |
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 | Publish a special section in your local newspaper with emergency
information on hurricanes. Localize the information by printing the phone
number of local emergency services offices, the American Red Cross chapter,
and the nearest hospitals.
 | Provide hurricane tracking charts to local schools.
 | Work with local emergency services and American
Red Cross officials to prepare special reports to people with mobility
impairments on what to do if an evacuation is ordered.
 | At the beginning of each hurricane season, encourage the emergency
response organizations to review community hurricane disaster plans.
 | Publicize and promote a hurricane awareness week.
 | Stage a simulated evacuation to show your community what can happen.
 | Periodically inform your community of local public warning systems.
 | Publish emergency evacuation routes. |
| | | | | | |
 | Continue listening regularly to a NOAA Weather Radio or local radio or
television stations for updated information. Hurricanes can change
direction, intensity, and speed very suddenly. What was a minor threat
several hours ago can quickly escalate to a major threat.
 | Listen to the advice of local officials, and evacuate if they tell you
to do so. Avoid flooded roads and watch for washed-out bridges. Leaving
an area that may be affected will help keep your family safe. Local
officials may call for evacuation in specific areas at greatest risk in your
community. Following the advice of local authorities is your safest
protection. Local officials may close down certain roads, especially near
the coast, when the outer effects of increasing wind and rain from a
hurricane reach the coast.
 | Prepare your property for high winds. Hurricane winds can blow
large, heavy objects and send them crashing into homes. Anything not secured
may become a deadly or damaging projectile.
 | Bring lawn furniture inside, as well as outdoor decorations or
ornaments, trash cans, hanging plants, or anything else that can be
picked up by the wind.
 | Make trees more wind resistant by removing diseased and damaged limbs,
then strategically remove branches so that wind can blow through.
 | Secure building by closing and boarding up each window of your home.
Remove outside antennas.
 | Moor boat securely or move it to a designated safe place. Use rope or
chain to secure boat to trailer. Use tie-downs to anchor trailer to the
ground or house. |
| | |
 | Fill your car's gas tank. If advised to evacuate, you may have to
travel long distances or be caught in traffic, idling for long periods of
time. Gas stations along the route may be closed.
 | Stock up on prescription medications. Stores and pharmacies may be
closed after the storm.
 | Recheck manufactured home tie-downs. Manufactured homes may not be
as affected by strong winds if they are tied down according to the
manufacturer's instructions. Properly tied down homes are more likely to
stay fixed to their foundations.
 | Check your Disaster
Supplies Kit. Some supplies may need to be replaced or restocked.
 | Turn refrigerator and freezer to coldest setting. Open only when
absolutely necessary and close quickly. Keeping the coldest air in will
help perishables last much longer in the event of a power failure.
 | Store valuables and personal papers in a safety deposit box in a
waterproof container on the highest level of your home. Hurricanes leave
much water damage inside homes. Historically, it is shown that protecting
valuables in this manner will provide the best security.
 | Turn off utilities if told to do so by authorities. Authorities may
ask you to turn off water or electric utilities to prevent damage to your
home or within the community. Most of the time they will tell you to leave
the gas on because a professional is required to turn your gas back on, and
it may be several weeks before you receive service.
 | Turn off propane tanks. Propane tanks may be damaged or dislodged
by strong winds or water. Turning them off reduces the fire potential if
they are damaged by the storm.
 | Unplug small appliances. Small appliances may be affected by
electrical power surges that may occur as the storm approaches. Unplugging
them reduces potential damage.
 | Review evacuation plan. Make sure your planned route is the same as
the currently recommended route. Sometimes roads may be closed or blocked,
requiring a different route.
 | Stay away from flood waters. If you come upon a flooded road, turn
around and go another way. When you are caught on a flooded road and waters
are rising rapidly around you, if you can do so safely, get out of your
vehicle and climb to higher ground. Most hurricane-related deaths are caused
by floods, and most flood fatalities are caused by people attempting to
drive through water. The depth of water is not always obvious. The roadbed
may be washed out under the water, and you could be stranded or trapped.
Rapidly rising water may stall the engine, engulf the vehicle and its
occupants, and sweep them away. Two feet of water will carry away most
automobiles. |
| | | | | | | | | | | | |
 | Listen to a NOAA Weather Radio,
or portable, battery- powered radio or television for updated information
and official instructions. Hurricanes can change direction, intensity,
and speed very suddenly. Continue listening for local information.
 | If officials announce a hurricane warning, they may ask you to leave
your home as soon as possible to be safe. Take your Disaster Supplies Kit
and go to a shelter or your family contact's home. Call your check-in
contact so someone will know where you are going. Local officials advise
leaving only if they truly believe your location is in danger. It is
important to follow their instructions as soon as possible. Roads may become
blocked and the storm can worsen, preventing safe escape. Having your
disaster supplies will make you more comfortable while you are away from
home.
 | If you are not advised to evacuate, stay indoors, on the first floor
away from windows, skylights and glass doors, even if they are covered.
Stay on the floor least likely to be affected by strong winds and flood
waters. A small interior room without windows on the first floor is usually
the safest place. Have as many walls between you and the outside winds as
possible. Sometimes strong winds and projectiles may tear hurricane shutters
off, so stay away from windows even if they are covered. Lie on the floor
under a table or other sturdy object. Being under a sturdy object will offer
greater protection from falling objects.
 | Close all interior doors. Secure and brace external doors. Closed
doors will help prevent damaging hurricane winds from entering additional
rooms.
 | Have a supply of flashlights and extra batteries handy. Avoid using
open flames (candles and kerosene lamps) as a source of light. Flashlights
provide the safest emergency lighting source. Between 1984 and 1998,
candle-related deaths from home fires following hurricanes were three times
greater than the number of deaths related to the direct impact of the
hurricane. Kerosene lamps require a great deal of ventilation and are
not designed for indoor use.
 | Store drinking water in clean bathtubs, sinks, plastic bottles, and
cooking utensils. Public water supplies and wells may become
contaminated, or electric pumps may be inoperative if power is lost.
Survivors of community-wide disasters have said the individual's greatest
need following the disaster is water.
 | If power is lost, turn off major appliances to reduce the power
"surge" when electricity is restored. When electricity is
restored, the surge from many major appliances starting at the same time may
cause damage or destroy the appliances. Turning off or unplugging major
appliances will allow you to decide when it is best to turn them back on.
 | If in a mobile home, check tie-downs and evacuate immediately.
Historically, manufactured homes suffer the greatest amount of damage during
hurricanes. Prior to 1994, most manufactured homes were not designed to
withstand even moderate winds.
 | Be aware that the calm "eye" is deceptive; the storm is not
over. The worst part of the storm will happen once the eye passes
over and the winds blow from the opposite direction. Trees, shrubs,
buildings, and other objects damaged by the first winds can be broken or
destroyed by the second winds. The opposing winds begin suddenly, and have
surprised and injured many people who ventured out during the eye.
 | Watch out for flooding. Hurricanes and tropical storms often drop
large amounts of rainfall and cause severe flooding, even when they are
weakening or are no longer a named storm. "Weak" tropical storms
are just as capable of producing heavy rainfall and flooding as major
hurricanes.
 | Be alert for tornadoes. Tornadoes can happen during and after a
hurricane passes over. Remain indoors on a lower level, in the center of
your home, in a closet or bathroom without windows. Going below ground, such
as to a basement or storm cellar, increases your risk from flood. |
| | | | | | | | | |
 | Leave as soon as possible (if possible, in daylight). Avoid flooded
roads and watch for washed-out bridges. Roads and bridges frequently become
crowded and traffic moves slow. Evacuation will probably take longer than
expected. Give yourself plenty of time.
 | Secure your home by unplugging appliances and turning off electricity
and the main water valve. This will reduce potential damage to your
appliances (from power surges) and to your home.
 | Tell someone outside of the storm area where you are going.
Relatives and friends will be concerned about your safety. Letting someone
know your travel plans will help relieve their fear and anxiety.
 | If time permits, and you live in an identified surge zone or area prone
to flooding, move furniture to a higher floor. Moving valuable
furnishings helps reduce potential damage.
 | Bring preassembled emergency supplies and warm protective clothing.
People frequently arrive at shelters or hotels with nothing. Having these
items will make you more comfortable in other locations.
 | While shelters provide a safe place to stay and food, specialty items
for infants and individuals on restricted diets may not be available. It
may take several days until permission is given by local authorities to
re-enter an evacuated area. Bring these items with you to a shelter:
 | First aid kit, manual, and prescription medications.
 | Baby food and diapers.
 | Cards, games, books.
 | Toiletries.
 | Battery-powered radio and extra batteries.
 | Flashlight (one per person) and extra batteries.
 | Blankets or sleeping bags.
 | Identification.
 | Valuable papers (copies of insurance papers, passports, and other
essential documents). |
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 | Lock up your home and leave. There may be individuals evacuating
after you, or returning before you. Police may be busy with
hurricane-related emergencies and not able to patrol neighborhoods as usual.
Lock your property as you normally would when leaving home. |
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 | Continue listening to local radio or television stations or a NOAA
Weather Radio for information and instructions. Access may be limited to
some parts of the community, or roads may be blocked.
 | If you evacuated, return home when local officials tell you it is safe.
Local officials on the scene are your best source of information on
accessible areas and passable roads.
 | Stay alert for extended rainfall and subsequent flooding, even after
the hurricane or tropical storm has weakened. Hurricanes may stall or
change direction when they make landfall, or they may bring a lot of rain
upriver, causing additional flood hazards for hours or days after the storm.
 | Stay away from flood waters. Drive only if absolutely necessary and
avoid flooded roads and washed-out bridges. Continue to follow all flood
safety messages. Flood waters may last for days following a hurricane. If
you come upon a flooded road, turn around and go another way. When you
are caught on a flooded road and waters are rising rapidly around you, if
you can safely get out of the car, do so immediately and climb to higher
ground. Never try to walk, swim, or drive through such swift water. Most
flood fatalities are caused by people attempting to drive through water or
people playing in high water. If it is moving swiftly, even water six inches
deep can sweep you off your feet, and two feet can carry away most
automobiles.
 | If you come upon a barricade, follow detour signs or turn around and go
another way. Barricades are put up by local officials to protect people
from unsafe roads. Driving around them can be a serious risk.
 | Stay on firm ground. Moving water only six inches deep can sweep
you off your feet. Standing water may be electrically charged from
underground or downed power lines.
 | Help injured or trapped persons. Give first aid where appropriate.
Do not move seriously injured persons unless they are in immediate danger of
further injury. Call for help.
 | Help a neighbor who may require special assistance - infants, elderly
people and people with disabilities. Elderly people and people with
disabilities may require additional assistance. People who care for them or
who have large families may need additional assistance in emergency
situations.
 | Avoid disaster areas. Your presence might hamper rescue and other
emergency operations, and put you at further risk from the residual effects
of floods, such as contaminated waters, crumbled roads, landslides,
mudflows, and other hazards.
 | Avoid loose or dangling power lines; immediately report them to the
power company, police, or fire department. Reporting potential hazards
will get the utilities turned off as quickly as possible, preventing further
hazard and injury.
 | Electrical equipment should be checked and dried before being returned
to service. Call an electrician for advice before using electricity,
which may have received water damage.
 | Stay out of the building if water remains around the building.
Flood waters often undermine foundations, causing buildings to sink, floors
to crack, or walls to collapse.
 | When entering buildings, use extreme caution. Hurricane- driven
flood waters may have damaged buildings where you least expect it. Carefully
watch every step you take.
 | Wear sturdy shoes. The most common injury following a disaster
is cut feet.
 | Use battery-powered lanterns or flashlights when examining
buildings. Battery-powered lighting is the safest and easiest,
preventing fire hazard for the user, occupants, and building.
 | Examine walls, floors, doors, staircases, and windows to make sure
that the building is not in danger of collapsing.
 | Inspect foundations for cracks or other damage. Cracks and
damage to a foundation can render a building uninhabitable.
 | Look for fire hazards. There may be broken or leaking gas
lines, flooded electrical circuits, or submerged furnaces or electrical
appliances. Flammable or explosive materials may come from upstream.
Fire is the most frequent hazard following floods.
 | Check for gas leaks. If you smell gas or hear a blowing or
hissing noise, open a window and quickly leave the building. Turn off
the gas, using the outside main valve if you can, and call the gas
company from a neighbor's home. If you turn off the gas for any reason,
it must be turned back on by a professional.
 | Look for electrical system damage. If you see sparks or broken
or frayed wires, or if you smell burning insulation, turn off the
electricity at the main fuse box or circuit breaker. If you have to step
in water to get to the fuse box or circuit breaker, call an electrician
first for advice. Electrical equipment should be checked and dried
before being returned to service.
 | Check for sewage and water line damage. If you suspect sewage
lines are damaged, avoid using the toilets and call a plumber. If water
pipes are damaged, contact the water company, and avoid using water from
the tap. You can obtain safe water from undamaged water heaters or by
melting ice cubes.
 | Watch out for animals, especially poisonous snakes, that may have
come into buildings with the flood waters. Use a stick to poke through
debris. Flood waters flush many animals and snakes out of their
homes.
 | Watch for loose plaster, drywall, and ceilings that could fall.
 | Take pictures of the damage, both of the building and its contents,
for insurance claims.
 | Open windows and doors to ventilate and dry your home.
 | Check refrigerated food for spoilage. If power was lost, some
foods may be spoiled.
 | Avoid drinking or preparing food with tap water until you are
certain it is not contaminated. Hurricane-driven flood waters may
have contaminated public water supplies or wells. Local officials should
advise you on the safety of the drinking water. Undamaged water heaters
or melted ice cubes can provide good sources of fresh drinking water.
 | Pump out flooded basements gradually (about one-third of the water
per day) to avoid structural damage. If the water is pumped out
completely in a short period of time, pressure from water on the outside
could cause basement walls to collapse.
 | Service damaged septic tanks, cesspools, pits, and leaching systems
as soon as possible. Damaged sewage systems are health hazards. |
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Use the telephone only for emergency calls. Telephone lines are
frequently overwhelmed in disaster situations. They need to be clear for
emergency calls to get through.
Hurricane Information
Terms
Advisory : Advisory
message are issued by the National Hurricane Center, giving information on all
tropical depressions, tropical storms, and hurricanes at midnight, 6am, 12
noon, and 6 pm. These advisories are supplemented at 3 hour intervals when
landfall is likely within 24 hours.
Tropical Storm Watch : A
tropical storm is similar, but smaller than a hurricane. Winds associated with
these storms are less than 74 mph, but can still cause widespread damage and
flooding. Tropical storm watches are made for specific coastal areas where
tropical storm conditions pose possible threats within 36 hours.
Hurricane Watch : These
watches are made for specific coastal areas. These are NOT warnings. These
watches mean that a hurricane is close enough for everyone to listen to
advisories and be prepared to take precautionary measures. Watches are usually
issued 24-36 hours prior to landfall.
Hurricane Warning : This
warning means that a hurricane is close enough to a specific coastal area that
precautionary measures must be taken immediately. These warnings are usually
issued 24 hours prior to landfall. However, if the hurricane's path is
unusual, it may only be a few hours before landfall before the warning is
issued.

Saffir/Simpson
Hurricane Scale
All hurricanes
are dangerous, but some more so than others. The way storm surge, wind, and
other factors combine determines the hurricane's destructive power. To make
comparisons easier and to make the predicted hazards of approaching hurricanes
clearer to emergency forces National Oceanic and Atmospheric Administration's
hurricane forecasters use a disaster - potential scale which assigns storms to
five categories. Category 1 is a minimum hurricane ; category 5 is the worst
case. The criteria for each category in the table shown below :
|
Category |
Wind Speed
& Pressure |
Effects / Example |
|
1 |
74 - 95 mph
> 980 MB |
Damage
primarily to unanchored mobile homes, shrubbery, and trees. Also, some
coastal road flooding and minor pier damage.
Example
: Hurricane Erin (1995) |
|
2 |
96 - 110 mph
965 - 679 MB |
Some roofing
material, door, and window damage to buildings. Considerable damage to
vegetation, mobile homes, and piers. Coastal and low lying escape routes
flood 2 - 4 hours before arrival of center. Small craft in unprotected
anchorages break moorings.
Examples
: Hurricane Bertha (1996), Georges (1998) |
|
3 |
111 - 130 mph
945 - 964 MB |
Some structural damage
to small residences and utility buildings with minor amount of curtain wall
failures. Mobile homes are destroyed. Flooding near the coast destroys
smaller structures with larger structures damaged by floating debris.
Terrain continuously lower than 5 feet ASL may be flooded inland 8
miles. |
|
4 |
131 - 155 mph
920 - 944 MB |
More
extensive curtain wall failures with some complete roof structure failure
on small residences. Major erosion of beach areas. Major damage to lower
floors of structures near the shore. Terrain continuously lower than 10
feet ASL may be flooded requiring evacuation of residential areas inland
as far as 6 miles.
Example
: Hurricane Andrew (1992),
Hurricane Charley (2004) |
|
5 |
155
+ mph
<
920 MB |
Complete
roof failure on many residences and industrial buildings. Some complete
building failures with small utility buildings blown over or away. Major
damage to lower floors of all structures located less than 15 feet ASL
and with-in 500 yards of shoreline. Massive evacuation of residential
areas on low ground with in 5 to 10 miles of the shoreline may be
required.
Example:
Hurricane Camille (1969), Hurricane Mitch (1998) |
Not included in the chart, but also important
are :
Tropical
Depressions (30-40 mph) warm core systems, and
Tropical Storms
(40-74 mph).
Produced by the National Disaster Education Coalition: American
Red Cross, FEMA, IAEM,
IBHS, NFPA,
NWS, USDA/CSREES,
and USGS. HTML formating By the
Disaster Center
From: Talking About Disaster: Guide for Standard Messages. Produced
by the National Disaster Education Coalition, Washington, D.C., 1999.
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