WTNT34 KNHC 081157
HURRICANE MATTHEW INTERMEDIATE ADVISORY NUMBER 41A
NWS NATIONAL HURRICANE CENTER MIAMI FL AL142016
800 AM EDT SAT OCT 08 2016
...STRONG WINDS AND DANGEROUS STORM SURGE AFFECTING THE COAST OF
...HEAVY RAINS AND GUSTY WINDS SPREADING INLAND...
SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION
ABOUT 20 MI...35 KM SSE OF CHARLESTON SOUTH CAROLINA
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...NE OR 45 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...962 MB...28.41 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Warning is in effect for...
* North of Altamaha Sound to Surf City
A Hurricane Watch is in effect for...
* North of Surf City to Cape Lookout
A Tropical Storm Warning is in effect for...
* North of Surf City to Duck
* Pamlico and Albemarle Sounds
For storm information specific to your area, including possible
inland watches and warnings, please monitor products issued by your
local National Weather Service forecast office.
DISCUSSION AND 48-HOUR OUTLOOK
At 800 AM EDT (1200 UTC), the center of Hurricane Matthew was
located by NOAA Doppler weather radars, and an Air Force Reserve
Hurricane Hunter aircraft, near latitude 32.5 North, longitude
79.8 West. Matthew is moving toward the northeast near 12 mph
(19 km/h), and this general motion is expected to continue today.
On the forecast track, the center of Matthew will continue to
move near or over the coast of South Carolina today, and be
near the coast of southern North Carolina by tonight.
Reports from the reconnaissance aircraft indicate that maximum
sustained winds have decreased to near 85 mph (140 km/h) with higher
gusts. Although weakening is forecast during the next 48 hours,
Matthew is expected to remain a hurricane while the center is near
the coasts of South Carolina and North Carolina.
Hurricane-force winds extend outward up to 45 miles (75 km) from
the center, and tropical-storm-force winds extend outward up to 185
miles (295 km). A private weather station at Folly Beach reported
a wind gust of 76 mph (122 km/h). Strong wind gusts are also
occurring well inland in South Carolina. Orangeburg recently
reported a wind gust of 55 mph (89 km/h).
The minimum central pressure recently reported by an Air Force
reconnaissance aircraft was 962 mb (28.41 inches).
HAZARDS AFFECTING LAND
WIND: Hurricane and tropical storm conditions are expected to
continue over the warning area in Georgia and South Carolina
this morning, and spread northward elsewhere within the warning area
Residents in high-rise buildings should be aware that the winds at
the top of a 30-story building will be, on average, about one
Saffir-Simpson category higher than the winds near the surface.
Hurricane conditions are possible within the Hurricane Watch and
Tropical Storm Warning area in North Carolina by tonight or Sunday
morning, with tropical storm conditions expected later this morning.
STORM SURGE: The combination of a dangerous storm surge, the tide,
and large and destructive waves will cause normally dry areas near
the coast to be flooded by rising waters moving inland from the
shoreline. The water could reach the following heights above ground
if the peak surge occurs at the time of high tide...
Altamaha Sound, GA, to Edisto Beach, SC...6 to 9 ft
Edisto Beach, SC to Cape Fear, NC...5 to 7 ft
Cape Fear to Duck, NC, including portions of the Pamlico and
Albemarle Sounds...2 to 4 ft
The deepest water will occur along the immediate coast in areas of
onshore winds. Surge-related flooding depends on the relative
timing of the surge and the tidal cycle, and can vary greatly over
short distances. Large waves generated by Matthew will cause water
rises to occur well in advance of and well away from the track of
the center. For information specific to your area, please see
products issued by your local National Weather Service forecast
There is a danger of life-threatening inundation during the next 36
hours along the coast from Altamaha Sound, Georgia, to Cape
Fear, North Carolina. There is the possibility of life-threatening
inundation during the next 48 hours from north of Cape Fear to Duck,
North Carolina, including portions of Pamlico and Albemarle Sounds.
For a depiction of areas at risk, please see the Prototype National
Weather Service Storm Surge Watch/Warning Graphic. For information
specific to your area, please see products issued by your local
National Weather Service forecast office.
The Prototype Storm Surge Watch/Warning Graphic is a depiction of
areas that would qualify for inclusion under a storm surge watch or
warning currently under development by the National Weather Service
and planned for operational use in 2017. The Prototype Graphic is
available at hurricanes.gov.
RAINFALL: Matthew is expected to produce total rain accumulations of
8 to 12 inches near and east of Interstate 95 in South Carolina and
North Carolina, with possible isolated maximum amounts of 15 inches.
Matthew is expected to produce 2 to 6 inches of rain over central
South Carolina, western North Carolina, and southeastern Virginia.
Additional rain accumulations of 1 to 2 inches are expected over
eastern Georgia. In all of these areas rainfall may result in
life-threatening flooding and flash flooding.
TORNADOES: An isolated tornado or two will be possible today along
the coast of North Carolina and northern South Carolina.
SURF: Swells generated by Matthew will continue to affect portions
of the east coast of Florida during the next few days, and will
spread northward along the southeast U.S. coast through the weekend.
These swells will likely cause life-threatening surf and rip current
conditions. Please consult products from your local weather office.
Next complete advisory at 1100 AM EDT.