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Hurricane Irma Local Statement Advisory Number 47
National Weather Service Charleston SC AL112017
550 PM EDT Sun Sep 10 2017
This product covers southeast South Carolina and southeast Georgia
**SIGNIFICANT IMPACTS FROM HURRICANE IRMA EXPECTED ACROSS THE AREA
INTO TUESDAY**
NEW INFORMATION
---------------
* CHANGES TO WATCHES AND WARNINGS:
- None.
* CURRENT WATCHES AND WARNINGS:
- A Storm Surge Warning, Tropical Storm Warning, and Hurricane
Watch are in effect for Beaufort, Coastal Bryan, Coastal
Chatham, Coastal Colleton, Coastal Jasper, Coastal Liberty,
Coastal McIntosh, and Inland Chatham
- A Storm Surge Warning and Tropical Storm Warning are in effect
for Charleston and Tidal Berkeley
- A Tropical Storm Warning is in effect for Allendale, Bulloch,
Candler, Dorchester, Effingham, Evans, Hampton, Inland
Berkeley, Inland Colleton, Jenkins, Long, Screven, and Tattnall
- A Tropical Storm Warning and Hurricane Watch are in effect for
Inland Bryan, Inland Jasper, Inland Liberty, and Inland McIntosh
* STORM INFORMATION:
- About 470 miles south-southwest of Charleston SC or about 410
miles south of Savannah GA
- 26.2N 81.8W
- Storm Intensity 110 mph
- Movement North or 350 degrees at 14 mph
SITUATION OVERVIEW
------------------
The center of Hurricane Irma will continue to move across Florida
tonight and into central and western Georgia on Monday into Tuesday.
Irma is a large hurricane and will produce significant impacts across
southeast South Carolina and southeast Georgia. Life- threatening
inundation is expected along the coast around the time of high tide
Monday afternoon. Flash flooding will be possible, with the highest
chances occurring along and south of I-16 as well as the coastal
counties of southeast South Carolina and southeast Georgia tonight
into Monday night. Tropical storm-force winds will impact much of the
region, and there is a low probability for hurricane force wind gusts
occurring along the coast between Altamaha Sound and Edisto Beach. The
risk for tornadoes will increase tonight and continue into Monday
evening.
POTENTIAL IMPACTS
-----------------
* SURGE:
Protect against life-threatening surge having possible significant
impacts across low-lying coastal areas in north coastal Georgia and
southeast South Carolina. Potential impacts in this area include:
- Areas of inundation of saltwater along immediate shorelines and
in low-lying spots farther inland near rivers and creeks, with
storm surge flooding accentuated by waves. Damage to several
buildings, mainly near the coast.
- Sections of near-shore escape routes and secondary roads become
weakened or washed out, especially in normally vulnerable low
spots.
- Moderate to major beach erosion with heavy surf breaching
dunes. Strong and numerous rip currents.
- Minor to moderate damage to marinas, docks, boardwalks, and
piers. Several small craft broken away from moorings,
especially in unprotected anchorages. Some navigation aids
possibly displaced well off station, creating difficult
navigation near inlets and waterways.
* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
extensive impacts across coastal areas and locations along and south
of I-16. Potential impacts include:
- Major rainfall flooding could prompt many rescues.
- Rivers and tributaries could rapidly overflow their banks in
multiple locations. Small streams, creeks, canals, ditches may
become dangerous rivers. Flood control systems and barriers
could become stressed.
- Flood waters could enter many structures within multiple
communities; some structures become uninhabitable or are washed
away. Flood waters could cover multiple escape routes. Streets
and parking lots become rivers of moving water with underpasses
submerged. Driving conditions become dangerous. Many road and
bridge closures with some weakened or washed out.
- Drinking water and sewer services could be negatively impacted.
- Hazardous containers and materials could possibly be present in
flood waters.
* WIND:
Protect against dangerous wind having possible significant impacts
across coastal areas and locations along and south of I-16. Potential
impacts in this area include:
- Some damage to roofing and siding materials, along with damage
to porches, awnings, carports, and sheds. A few buildings
experiencing window, door, and garage door failures. Mobile
homes damaged, especially if unanchored. Unsecured lightweight
objects become dangerous projectiles.
- Several large trees snapped or uprooted, but with greater
numbers in places where trees are shallow rooted.
- Some roads impassable from large debris, and more within urban
or heavily wooded places. A few bridges and access routes
impassable.
- Travel by vehicle or on foot increasingly difficult. Danger of
death or injury from falling objects such as trees or electric
wires outside.
- Scattered power and communications outages, but more prevalent
in areas with above ground lines, which could persist for hours
or days.
- Some poorly secured small craft could break loose from their
moorings.
* TORNADOES:
Protect against a dangerous tornado event having possible significant
impacts across southeast Georgia and southeast South Carolina. Potential
impacts include:
- Isolated to scattered tornadoes can hinder the execution of
emergency plans.
- Scattered locations could experience enhanced damage due to
tornadoes with a few spots of considerable damage, power loss,
and communications failures.
- Scattered locations could realize roofs torn off frame houses,
mobile homes demolished, boxcars overturned, large trees
snapped or uprooted, vehicles tumbled, and small boats tossed
about.
PRECAUTIONARY/PREPAREDNESS ACTIONS
----------------------------------
* EVACUATIONS:
Consider evacuating, especially if being officially recommended to
do so by local authorities. Relocate to a predetermined shelter or
safe destination.
* OTHER PREPAREDNESS INFORMATION:
Outside preparations should be wrapped up as soon as possible before
weather conditions completely deteriorate. Any remaining evacuations
and relocations should be expedited before the onset of tropical
storm force wind.
Failure to adequately shelter may result in serious injury or loss of
life. Always heed the advice of local officials and comply with any
orders that are issued. Remember, during the storm 9 1 1 Emergency
Services may not be able to immediately respond if conditions are
unsafe. This should be a big factor in your decision making.
In emergencies it is best to remain calm. Stay informed and focused
on the situation at hand. Exercise patience with those you encounter.
Be a Good Samaritan and helpful to others.
If you encounter water covering the road, seek an alternate route.
Always obey official road signs for closures and detours.
If you are a visitor and still in the area, listen for the name of
the city or town in which you are staying within local news updates.
Be sure you know the name of the county in which it resides. Pay
attention for instructions from local authorities.
Closely monitor NOAA weather radio or other local news outlets for
official storm information. Be ready to adapt to possible changes to
the forecast.
* ADDITIONAL SOURCES OF INFORMATION:
- For information on appropriate preparations see ready.gov
- For information on creating an emergency plan see getagameplan.org
- For additional disaster preparedness information see redcross.org
NEXT UPDATE
-----------
The next local statement will be issued by the National Weather
Service in Charleston SC around 12 AM EDT, or sooner if conditions
warrant.
Click here to read more at The National Hurricane Center
