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Hurricane Sally Advisory Number 22
NWS National Hurricane Center Miami FL AL192020
1000 AM CDT Wed Sep 16 2020
...CATASTROPHIC AND LIFE-THREATENING FLOODING OCCURRING OVER
PORTIONS OF THE FLORIDA PANHANDLE AND SOUTHERN ALABAMA...
SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION
ABOUT 15 MI...20 KM WNW OF PENSACOLA FLORIDA
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...NNE OR 30 DEGREES AT 5 MPH...7 KM/H
MINIMUM CENTRAL PRESSURE...975 MB...28.79 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
The Tropical Storm Warning has been discontinued west of the
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Warning is in effect for...
* Dauphin Island Alabama to the Walton/Bay County Line Florida
A Hurricane Warning is in effect for...
* Mississippi/Alabama border to the Okaloosa/Walton County line
A Tropical Storm Warning is in effect for...
* East of the Okaloosa/Walton County line Florida to Indian Pass
A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline 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.
A Hurricane Warning means that hurricane conditions are occurring
somewhere within the warning area.
A Tropical Storm Warning means that tropical storm conditions are
occurring 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 1000 AM CDT (1500 UTC), the center of Hurricane Sally was located
by NWS Doppler radar and surface observations near latitude 30.6
North, longitude 87.4 West. Sally is moving toward the north-
northeast near 5 mph (7 km/h), and a north-northeastward to
northeastward motion at a slightly faster forward speed is expected
later today and tonight. A faster northeastward motion is forecast
Thursday and Thursday night. On the forecast track, the center of
Sally will move across the extreme western Florida panhandle and
southeastern Alabama through early Thursday, move over central
Georgia on Thursday, and move over South Carolina Thursday night.
Maximum sustained winds have decreased to near 80 mph (130 km/h)
with higher gusts. Additional weakening is expected as the center
moves farther inland this afternoon and tonight, and Sally is
forecast to become a tropical depression by Thursday morning.
Hurricane-force winds extend outward up to 35 miles (55 km) from the
center and tropical-storm-force winds extend outward up to 125 miles
(205 km). A wind gust of 82 mph (135 km/h) was recently observed at
the Pensacola Naval Air Station, in Pensacola, Florida. A wind gust
of 68 mph (110 km/h) was recently reported at the Mobile Downtown
Airport, in Mobile, Alabama.
The estimated minimum central pressure based on surface observations
is 975 mb (28.79 inches).
HAZARDS AFFECTING LAND
Key messages for Sally can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC,
and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml
RAINFALL: Through this afternoon, Sally will produce additional
rainfall totals of 8 to 12 inches with localized higher amounts
possible along and just inland of the central Gulf Coast from west
of Tallahassee, Florida to Mobile Bay, Alabama. Storm totals of 10
to 20 inches to isolated amounts of 35 inches are expected. Historic
and catastrophic flooding, including widespread moderate to major
river flooding, is unfolding.
Sally will track across the Southeast through Friday, producing the
following rainfall totals:
Central Alabama to central Georgia: 4 to 8 inches, with isolated
amounts of 12 inches. Significant flash and urban flooding is
likely, as well as widespread minor to moderate flooding on some
Western South Carolina into western and central North Carolina: 4 to
6 inches, with isolated amounts of 9 inches. Widespread flash and
urban flooding is possible, as well as minor to moderate river
Southeast Virginia: 2 to 5 inches, with isolated amounts of 7
inches. Scattered flash and urban flooding is possible, as well as
scattered minor river flooding.
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 could
reach the following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...
AL/FL Border to Okaloosa/Walton County Line, FL including Pensacola
Bay and Choctawhatchee Bay...4-7 ft
Okaloosa/Walton County Line, FL to Walton/Bay County Line, FL...2-4
Dauphin Island, AL to AL/FL Border including Bon Secour Bay...2-4 ft
Walton/Bay County Line, FL to Chassahowitzka, FL including Saint
Andrew Bay...1-3 ft
The deepest water will occur along the immediate coast in areas of
onshore winds, where the surge will be accompanied by large and
damaging 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
WIND: Hurricane conditions will continue this afternoon within
portions of the hurricane warning area in Florida and Alabama.
Tropical storm conditions will continue in portions of the warning
areas through tonight.
TORNADOES: A few tornadoes may occur today and tonight across
portions of the Florida Panhandle, southeast Alabama, and southwest
SURF: Swells from Sally will continue to affect the Gulf Coast
from the Florida Big Bend westward to southeastern Louisiana during
the next day or so. These swells are likely to cause life-
threatening surf and rip current conditions. Please consult
products from your local weather office.
Next intermediate advisory at 100 PM CDT.
Next complete advisory at 400 PM CDT.