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Old 12th September 2018, 07:32
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BULLETIN
Hurricane Florence Intermediate Advisory Number 51A
NWS National Hurricane Center Miami FL AL062018
200 AM AST Wed Sep 12 2018

...DANGEROUS FLORENCE EXPECTED TO BRING LIFE-THREATENING STORM SURGE
AND RAINFALL TO PORTIONS OF THE CAROLINAS AND MID-ATLANTIC STATES...


SUMMARY OF 200 AM AST...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...28.5N 69.5W
ABOUT 385 MI...620 KM SW OF BERMUDA
ABOUT 625 MI...1005 KM SE 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...946 MB...27.93 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
* 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.

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 200 AM AST (0600 UTC), the eye of Hurricane Florence was located
near latitude 28.5 North, longitude 69.5 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 today, and approach the coast of North Carolina or South
Carolina in the hurricane warning area on Thursday and Friday.

Maximum sustained winds are near 140 mph (220 km/h) with higher
gusts. Florence is a category 4 hurricane on the Saffir-Simpson
Hurricane Wind Scale. Strengthening is forecast through today.
While some weakening is expected on Thursday, Florence is forecast
to be an extremely dangerous major hurricane as it approaches the
U.S. coast.

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 minimum central pressure reported by an Air Force Hurricane
Hunter aircraft is 946 mb (27.93 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, Pamlico, Pungo, and
Bay 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 complete advisory at 500 AM AST.





https://www.nhc.noaa.gov/storm_graph...png/025552.png
__________________
David