FROM THE NATIONAL HURRICANE CENTER, 8 pm ET update, 9/13/18:

BULLETIN
Hurricane Florence Intermediate Advisory Number 58A
NWS National Hurricane Center Miami FL AL062018
800 PM EDT Thu Sep 13 2018

…SUSTAINED HURRICANE-FORCE WINDS OCCURRING ALONG THE NORTH
CAROLINA COAST…
…LIFE-THREATENING STORM SURGE AND RAINFALL EXPECTED…

SUMMARY OF 800 PM EDT…0000 UTC…INFORMATION
———————————————-
LOCATION…33.9N 76.4W
ABOUT 85 MI…135 KM ESE OF WILMINGTON NORTH CAROLINA
ABOUT 145 MI…230 KM E OF MYRTLE BEACH SOUTH CAROLINA
MAXIMUM SUSTAINED WINDS…100 MPH…155 KM/H
PRESENT MOVEMENT…NW OR 305 DEGREES AT 5 MPH…7 KM/H
MINIMUM CENTRAL PRESSURE…955 MB…28.20 INCHES

WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for…
* South Santee River South Carolina to Duck North Carolina
* Albemarle and Pamlico Sounds, including the Neuse and Pamlico
Rivers

A Storm Surge Watch is in effect for…
* Edisto Beach South Carolina to South Santee River South Carolina
* North of Duck North Carolina to the North Carolina/Virginia border

A Hurricane Warning is in effect for…
* South Santee River South Carolina to Duck North Carolina
* Albemarle and Pamlico Sounds

A Hurricane Watch is in effect for…
* Edisto Beach South Carolina to South Santee River South Carolina

A Tropical Storm Warning is in effect for…
* North of Duck North Carolina to Cape Charles Light Virginia
* Chesapeake Bay south of New Point Comfort
* Edisto Beach South Carolina to South Santee River South Carolina

Interests elsewhere in the southeastern and mid-Atlantic states
should monitor the progress of Florence.

A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline. For
a depiction of areas at risk, please see the National Weather
Service Storm Surge Watch/Warning Graphic, available at
hurricanes.gov.

A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline.

A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area, in this case within the next 12
to 24 hours.

A Hurricane Watch means that hurricane conditions are possible
within the watch area.

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.

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 OUTLOOK
———————-
At 800 PM EDT (0000 UTC), data from NOAA Doppler weather radars and
an Air Force Reserve Hurricane Hunter aircraft indicate that the
center of the eye of Florence was located near latitude 33.9 North,
longitude 76.4 West. Florence is moving slowly toward the northwest
near 5 mph (7 km/h), but a slow west-northwestward motion is
expected to resume tonight or Friday. A slow westward to
west-southwestward motion is expected Friday night and Saturday. On
the forecast track, the center of Florence will approach the coasts
of North and South Carolina later tonight, then move near or over
the coast of southern North Carolina and northeastern South Carolina
in the hurricane warning area on Friday. A slow motion across
portions of eastern and central South Carolina is forecast Friday
night through Saturday night.

Wind data from the Hurricane Hunter aircraft indicate that maximum
sustained winds remain near 100 mph (155 km/h) with higher gusts.
Little change in strength is expected before the eye of Florence
reaches the coast, with slow weakening expected after the center
moves inland or meanders near the coast. More significant weakening
is forecast on Saturday as Florence moves farther inland over
central South Carolina.

Hurricane-force winds extend outward up to 80 miles (130 km) from
the center and tropical-storm-force winds extend outward up to 195
miles (315 km). A NOAA observing site at Cape Lookout, North
Carolina recently reported a sustained wind of 82 mph (131 km/h)
and a gust to 97 mph (156 km/h). A Weatherflow station at Fort
Macon, North Carolina, recently reported a sustained wind of 67 mph
(108 km/h) and a gust to 99 mph (159 km/h).

Data from the plane indicate that the minimum central pressure
remains 955 mb (28.20 inches).

HAZARDS AFFECTING LAND
———————-
STORM SURGE: The combination of a dangerous storm surge and the
tide will cause normally dry areas near the coast to be flooded by
rising waters moving inland from the shoreline. The water has the
potential to reach the following heights above ground…

Cape Fear NC to Cape Lookout NC…7-11 ft, with locally higher
amounts in the Neuse, Pamlico, Pungo, and Bay Rivers
Cape Lookout NC to Ocracoke Inlet NC…6-9 ft
South Santee River SC to Cape Fear NC…4-6 ft
Ocracoke Inlet NC to Salvo NC…4-6 ft
Salvo NC to North Carolina/Virginia Border…2-4 ft
Edisto Beach SC to South Santee River SC…2-4 ft

The deepest water will occur along the immediate coast in areas of
onshore winds, where the surge will be accompanied by large and
destructive waves. Surge-related flooding can vary greatly over
short distances. For information specific to your area, please see
products issued by your local National Weather Service forecast
office.

RAINFALL: Florence is expected to produce heavy and excessive
rainfall in the following areas…

Southeastern coastal North Carolina into far northeastern South
Carolina…20 to 30 inches, isolated 40 inches. This rainfall will
produce catastrophic flash flooding and prolonged significant river
flooding.

Remainder of South Carolina and North Carolina into southwest
Virginia…6 to 12 inches, isolated 15 inches. This rainfall will
produce life-threatening flash flooding.

WIND: Hurricane conditions have reached portions of the coast of
North Carolina and are expected to spread elsewhere within the
hurricane warning area overnight or early Friday. Tropical
storm conditions are expected to spread inland and south across
the remainder of the warning areas through Saturday.

TORNADOES: A few tornadoes are possible in eastern and
southeastern North Carolina through Friday.

SURF: Swells generated by Florence are affecting Bermuda, portions
of the U.S. East Coast, and the northwestern and central Bahamas.
These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
office.

NEXT ADVISORY
————-
Next complete advisory at 1100 PM EDT.

$$
Forecaster Berg

LEAVE A REPLY

Please enter your comment!
Please enter your name here