FLORENCE PUBLIC ADVISORY ISSUED BY NHC
226
WTNT31 KNHC 112040
TCPAT1
BULLETIN
Hurricane Florence Advisory Number 50
NWS National Hurricane Center Miami FL AL062018
500 PM AST Tue Sep 11 2018
...DANGEROUS FLORENCE EXPECTED TO BRING LIFE-THREATENING STORM
SURGE AND RAINFALL TO PORTIONS OF THE CAROLINAS AND MID-ATLANTIC...
SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...27.5N 67.1W
ABOUT 360 MI...580 KM SSW OF BERMUDA
ABOUT 785 MI...1260 KM ESE OF CAPE FEAR NORTH CAROLINA
MAXIMUM SUSTAINED WINDS...140 MPH...220 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...945 MB...27.91 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
A Storm Surge Warning has been issued from South Santee
River, South Carolina, to Duck, North Carolina, and the Albemarle
and Pamlico Sounds, including the Neuse and Pamlico Rivers.
A Hurricane Warning has been issued from South Santee
River, South Carolina, to Duck, North Carolina, and the Albemarle
and Pamlico Sounds.
A Tropical Storm Watch has been issued from north of the North
Carolina/Virginia border to Cape Charles Light, Virginia, and for
the Chesapeake Bay south of New Point Comfort.
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
* North of Duck North Carolina to the North Carolina/Virginia border
A Tropical Storm Watch is in effect for...
* North of the North Carolina/Virginia border to Cape Charles Light
Virginia
* Chesapeake Bay south of New Point Comfort
Interests elsewhere in the southeastern and mid-Atlantic states
should monitor the progress of Florence. Additional watches and
warnings may be required tonight or Wednesday.
A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline,
during the next 36 hours in the indicated locations. For a
depiction of areas at risk, please see the National Weather
Service Storm Surge Watch/Warning Graphic, available at
hurricanes.gov. This is a life-threatening situation. Persons
located within these areas should take all necessary actions to
protect life and property from rising water and the potential for
other dangerous conditions. Promptly follow evacuation and other
instructions from local officials.
A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline, in the indicated locations during the next 48 hours.
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area. A warning is typically issued
36 hours before the anticipated first occurrence of tropical-storm-
force winds, conditions that make outside preparations difficult or
dangerous. Preparations to protect life and property should be
rushed to completion.
A Hurricane Watch means that hurricane conditions are possible
within the watch area. A watch is typically issued 48 hours
before the anticipated first occurrence of tropical-storm-force
winds, conditions that make outside preparations difficult or
dangerous.
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.
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 500 PM AST (2100 UTC), the center of the eye of Hurricane
Florence was located by satellite near latitude 27.5 North,
longitude 67.1 West. Florence is moving toward the west-northwest
near 17 mph (28 km/h). A motion toward the west-northwest and
northwest is expected through early Thursday. Florence is expected
to slow down considerably by late Thursday into Friday. On the
forecast track, the center of Florence will move over the
southwestern Atlantic Ocean between Bermuda and the Bahamas through
Wednesday, and approach the coast of North Carolina or South
Carolina in the hurricane warning area on Thursday and Friday.
Maximum sustained winds have increased to near 140 mph (220 km/h)
with higher gusts. Florence is a category 4 hurricane on the
Saffir-Simpson Hurricane Wind Scale. Further strengthening is
forecast tonight and Wednesday. While some weakening is expected on
Thursday, Florence is forecast to be an extremely dangerous major
hurricane through landfall.
Hurricane-force winds extend outward up to 60 miles (95 km) from the
center and tropical-storm-force winds extend outward up to 175 miles
(280 km).
The estimated minimum central pressure is 945 mb (27.91 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 if peak surge
occurs at the time of high tide...
Cape Fear to Cape Lookout, including the Neuse and Pamlico
Rivers...9-13 ft
North Myrtle Beach to Cape Fear...6-9 ft
Cape Lookout to Ocracoke Inlet...6-9 ft
South Santee River to North Myrtle Beach...4-6 ft
Ocracoke Inlet to North Carolina/Virginia Border...4-6 ft
Edisto Beach to South Santee River...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 depends on the relative
timing of the surge and the tidal cycle, and 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 total rainfall
accumulations of 15 to 25 inches with isolated maximum amounts of
35 inches near the storm's track over portions of the Carolinas and
Mid-Atlantic States from late this week into early next week. This
rainfall would produce catastrophic flash flooding and significant
river flooding.
WIND: Hurricane conditions are expected to reach the coast within
the hurricane warning area on Friday. Winds are expected to first
reach tropical storm strength on Thursday, making outside
preparations difficult or dangerous. Preparations to protect life
and property should be rushed to completion.
SURF: Swells generated by Florence are affecting Bermuda and
portions of the U.S. East Coast. These swells are likely to cause
life-threatening surf and rip current conditions. Please consult
products from your local weather office.
NEXT ADVISORY
-------------
Next intermediate advisory at 800 PM AST.
Next complete advisory at 1100 PM AST.
$$
Forecaster Stewart
https://www.nhc.noaa.gov/
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