DANGEROUS FLORENCE HEADED FOR THE U.S. EAST COAST


Hurricane Florence Intermediate Advisory Number 50A
NWS National Hurricane Center Miami FL       AL062018
800 PM AST Tue Sep 11 2018

...DANGEROUS FLORENCE HEADED FOR THE U.S. EAST COAST...
...EXPECTED TO BRING LIFE-THREATENING STORM SURGE AND RAINFALL TO
PORTIONS OF THE CAROLINAS AND MID-ATLANTIC STATES...


SUMMARY OF 800 PM AST...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...28.0N 67.9W
ABOUT 350 MI...565 KM SSW OF BERMUDA
ABOUT 725 MI...1165 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:

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.  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 800 PM AST (0000 UTC), the eye of Hurricane Florence was located
by satellite near latitude 28.0 North, longitude 67.9 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 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 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).


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