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BULLETIN
Tropical Storm Gordon Special Advisory Number   4
NWS National Hurricane Center Miami FL       AL072018
830 AM EDT Mon Sep 03 2018

...TROPICAL STORM GORDON FORMS OVER THE UPPER FLORIDA KEYS...
...TROPICAL STORM WARNINGS ISSUED FOR PORTIONS OF SOUTH FLORIDA
AND THE FLORIDA KEYS WITH HEAVY RAINS LIKELY...


SUMMARY OF 830 AM EDT...1230 UTC...INFORMATION
----------------------------------------------
LOCATION...25.1N 80.7W
ABOUT 20 MI...30 KM W OF KEY LARGO FLORIDA
ABOUT 85 MI...135 KM SE OF MARCO ISLAND FLORIDA
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

A Tropical Storm Warning has been issued for portions of South
Florida from Golden Beach to Bonita Beach, and for the Florida
Keys from Craig Key to Ocean Reef, including Florida Bay.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Watch is in effect for...
* Mississippi-Alabama border westward to the Mouth of the
Mississippi River

A Tropical Storm Warning is in effect for...
* Golden Beach to Bonita Beach
* Craig Key to Ocean Reef, including Florida Bay
* Alabama-Florida border westward to east of Morgan City, Louisiana,
including Lake Pontchartrain and Lake Maurepas

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

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 830 AM EDT (1230 UTC), the center of Tropical Storm Gordon was
located by NOAA Doppler weather radar and surface observations
near latitude 25.1 North, longitude 80.7 West. Gordon is moving
toward the west-northwest near 17 mph (28 km/h) and a west-
northwestward to northwestward motion is expected over the next
72 hours.  On the forecast track, the center of Gordon will pass
over the southern tip of the Florida peninsula this morning, move
over the southeastern Gulf of Mexico this afternoon and evening, and
reach the warning area along the central Gulf Coast by late Tuesday
or Tuesday night.

Surface observations and radar data indicate that maximum sustained
winds have increased to near 45 mph (75 km/h) with higher gusts.
Additional strengthening is forecast during the next 48 hours.

Tropical-storm-force winds extend outward up to 45 miles (75 km)
from the center.

The estimated minimum central pressure is 1009 mb (29.80 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 could
reach the following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...

Destin Florida to the Mississippi-Alabama border...1 to 2 ft.
Mississippi-Alabama border to the Mouth of Mississippi River...2 to
4 ft
Mouth of the Mississippi River to the Louisiana-Texas border...1 to
2 ft

The deepest water will occur along the immediate coast near and to
the east of the landfall location, where the surge will be
accompanied by large 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:  Gordon is expected to produce total rain accumulations of
2 to 4 inches over the central and northwestern Bahamas, the Florida
Keys, and South Florida through early Tuesday. Isolated maximum
amounts of 8 inches are possible over the southern Florida
peninsula.

Gordon is expected to produce total rain accumulations of 4 to 6
inches over southern Alabama, southern Mississippi and Louisiana,
with isolated maximum amounts of 8 inches through early Thursday.

These rainfall amounts may cause flash flooding.

WIND:  Tropical storm conditions are occurring in the warning areas
across South Florida and the Florida Keys, and those conditions
should continue through the afternoon. Tropical storm conditions are
expected within portions of the central Gulf Coast warning area by
late Tuesday.


NEXT ADVISORY
-------------
Next complete advisory at 1100 AM EDT.

$$
Forecaster Stewart

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