WTNT34 KNHC 072357
HURRICANE MATTHEW INTERMEDIATE ADVISORY NUMBER 39A
NWS NATIONAL HURRICANE CENTER MIAMI FL AL142016
800 PM EDT FRI OCT 07 2016
...EYE OF HURRICANE MATTHEW MOVING NORTHWARD JUST OFF OF THE COASTS
OF GEORGIA AND NORTHEASTERN FLORIDA...
SUMMARY OF 800 PM EDT...0000 UTC...INFORMATION
ABOUT 55 MI...90 KM ENE OF JACKSONVILLE BEACH FLORIDA
ABOUT 105 MI...170 KM SSE OF SAVANNAH GEORGIA
MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H
PRESENT MOVEMENT...N OR 5 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...948 MB...28.00 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
All coastal warnings have been discontinued south of the
Flagler/Volusia county line.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Warning is in effect for...
* North of Flagler/Volusia county line 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 PM EDT (0000 UTC), the eye of Hurricane Matthew was located
near latitude 30.7 North, longitude 80.6 West. Matthew is moving
toward the north near 12 mph (19 km/h), and this motion is expected
to continue tonight. A turn toward toward the north-northeast and
then to the northeast is expected on Saturday. On the forecast
track, the center of Matthew will continue to move near or over the
coast of northeast Florida and Georgia through tonight, and near or
over the coast of South Carolina on Saturday.
Maximum sustained winds are near 110 mph (175 km/h) with higher
gusts. Although weakening is forecast during the next 48 hours,
Matthew is expected to remain a hurricane until it begins to move
away from the southeastern United States on Sunday.
Hurricane-force winds extend outward up to 60 miles (95 km) from
the center and tropical-storm-force winds extend outward up to 185
miles (295 km). A private weather station at Folly Beach, South
Carolina, recently reported a wind gust of 68 mph (107 km/h). In
addition, during the last two hours there have been multiple
reports of wind gusts of 60-65 mph (97-105 km/h) in the Jacksonville
The minimum central pressure recently reported by an Air Force
Hurricane Hunter Reserve aircraft was 948 mb (28.00 inches).
HAZARDS AFFECTING LAND
WIND: Hurricane and tropical storm conditions are expected to
continue over the warning area in Florida tonight, and spread
northward elsewhere within the warning area through Saturday.
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 Saturday night or
Sunday morning, with tropical storm conditions expected by Saturday
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...
Flagler Beach, Florida, to Edisto Beach, South Carolina, including
portions of the St. Johns River...6 to 9 ft
Flagler/Volusia county line to Flagler Beach, Florida...4 to 6 ft
Edisto Beach, South Carolina to Cape Fear, North Carolina...
5 to 7 ft
Cape Fear to Duck, North Carolina, 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 Florida northeast coast, the Georgia coast, the
South Carolina coast, and the North Carolina coast from the
Volusia/Brevard county line, Florida, 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. 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 over the Atlantic coast of the United States from
northeast Florida to eastern North Carolina, with possible isolated
maximum amounts of 15 inches. This rainfall may result in life-
threatening flooding and flash flooding.
TORNADOES: Isolated tornadoes are possible across parts of the
South Carolina and Georgia coastal plains late this afternoon and
SURF: Swells generated by Matthew will continue to affect portions
of the Bahamas and 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 PM EDT.
Tropical Cyclone Updates at 900 PM and 1000 PM EDT.