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BULLETIN
TROPICAL STORM ISAAC INTERMEDIATE ADVISORY NUMBER  24A
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092012
200 AM EDT MON AUG 27 2012

...ISAAC MOVING WEST-NORTHWESTWARD OVER THE EASTERN GULF OF MEXICO
WITH NO CHANGE IN STRENGTH...


SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...24.8N 83.5W
ABOUT 110 MI...175 KM W OF KEY WEST FLORIDA
ABOUT 455 MI...730 KM SE OF THE MOUTH OF THE MISSISSIPPI RIVER
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...990 MB...29.23 INCHES


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

NONE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A HURRICANE WARNING IS IN EFFECT FOR...
* EAST OF MORGAN CITY LOUISIANA TO DESTIN FLORIDA...INCLUDING
METROPOLITAN NEW ORLEANS...LAKE PONTCHARTRAIN...AND LAKE MAUREPAS

A HURRICANE WATCH IS IN EFFECT FOR...
* EAST OF DESTIN TO INDIAN PASS FLORIDA

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* THE FLORIDA PENINSULA FROM JUPITER INLET SOUTHWARD ON THE
EAST COAST AND FROM TARPON SPRINGS SOUTHWARD ON THE WEST COAST.
* FLORIDA KEYS...INCLUDING THE DRY TORTUGAS AND FLORIDA BAY
* LAKE OKEECHOBEE
* EAST OF DESTIN FLORIDA TO THE SUWANNEE RIVER

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 WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.

WATCHES OR WARNINGS MAY BE EXTENDED WESTWARD ALONG THE COAST OF
LOUISIANA EARLY MONDAY.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED STATES...
INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE MONITOR
PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST
OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDE THE
UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL
METEOROLOGICAL SERVICE.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 200 AM EDT...0600 UTC...THE CENTER OF TROPICAL STORM ISAAC WAS
LOCATED NEAR LATITUDE 24.8 NORTH...LONGITUDE 83.5 WEST. ISAAC IS
MOVING TOWARD THE WEST-NORTHWEST NEAR 14 MPH...22 KM/H. A GRADUAL
TURN TOWARD THE NORTHWEST WITH A DECREASE IN FORWARD SPEED IS
EXPECTED OVER THE NEXT 48 HOURS. ON THE FORECAST TRACK...THE CENTER
OF ISAAC IS EXPECTED TO CONTINUE MOVING AWAY FROM THE FLORIDA KEYS
OVERNIGHT...MOVE OVER THE EASTERN GULF OF MEXICO ON MONDAY...AND
APPROACH THE NORTHERN GULF COAST ON TUESDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 65 MPH...100 KM/H...WITH HIGHER
GUSTS. SOME STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS...
AND ISAAC IS EXPECTED TO BECOME A HURRICANE IN A DAY OR SO.

TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 205 MILES...335
KM...MAINLY TO THE NORTHEAST OF THE CENTER. WEST PALM BEACH FLORIDA
RECENTLY REPORTED A WIND GUST OF 61 MPH...98 KM/H.

THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE RESERVE
HURRICANE HUNTER AIRCRAFT WAS 990 MB...29.23 INCHES.


HAZARDS AFFECTING LAND
----------------------
RAINFALL...TOTAL RAINFALL ACCUMULATIONS OF 4 TO 8 INCHES...WITH
MAXIMUM AMOUNTS OF 10 INCHES...ARE POSSIBLE ACROSS THE FLORIDA KEYS
AND THE SOUTHERN HALF OF THE FLORIDA PENINSULA. TOTAL RAINFALL
AMOUNTS OF 5 TO 10 INCHES...WITH MAXIMUM AMOUNTS OF 15 INCHES...ARE
POSSIBLE ALONG THE EASTERN AND CENTRAL GULF COAST. BOYNTON BEACH
FLORIDA SO FAR HAS REPORTED 10 INCHES OF RAIN IN ASSOCIATION WITH
ISAAC.

WIND...TROPICAL STORM CONDITIONS ARE OCCURRING OVER PORTIONS OF
SOUTHERN FLORIDA AND THE FLORIDA KEYS...AND SHOULD SPREAD NORTHWARD
ALONG THE FLORIDA WEST COAST IN THE TROPICAL STORM WARNING AREA.

TROPICAL STORM CONDITIONS ARE EXPECTED TO REACH THE NORTHERN GULF
COAST IN THE WARNING AREA BY LATE MONDAY...WITH HURRICANE
CONDITIONS EXPECTED ON TUESDAY.

STORM SURGE...THE COMBINATION OF A STORM SURGE AND THE TIDE WILL
CAUSE NORMALLY DRY AREAS NEAR THE COAST TO BE FLOODED BY RISING
WATERS. THE WATER COULD REACH THE FOLLOWING DEPTHS ABOVE GROUND IF
THE PEAK SURGE OCCURS AT THE TIME OF HIGH TIDE...

* NORTHERN GULF COAST WITHIN THE HURRICANE WARNING AREA...6 TO 12 FT
* REMAINDER OF THE FLORIDA PANHANDLE AND APALACHEE BAY...4 TO 7 FT
* FLORIDA WEST COAST SOUTH OF APALACHEE BAY...2 TO 4 FT
* SOUTHEAST FLORIDA COAST AND THE FLORIDA KEYS...1 TO 3 FT

THE DEEPEST WATER WILL OCCUR ALONG THE IMMEDIATE COAST IN AREAS OF
ONSHORE FLOW. 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 WEATHER SERVICE OFFICE. NEAR THE
COAST...THE SURGE WILL BE ACCOMPANIED BY LARGE AND DANGEROUS WAVES.

TORNADOES...ISOLATED TORNADOES ARE POSSIBLE OVER CENTRAL AND
SOUTHERN FLORIDA THROUGH MONDAY.

SURF...DANGEROUS SURF AND RIP CURRENT CONDITIONS WILL CONTINUE TO
AFFECT THE NORTHWESTERN BAHAMAS...THE FLORIDA PENINSULA AND THE
FLORIDA KEYS DURING THE NEXT DAY OR SO. PLEASE CONSULT PRODUCTS
FROM YOUR LOCAL WEATHER OFFICE FOR MORE INFORMATION.


NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY...500 AM EDT.

$$
FORECASTER BRENNAN



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