Tropical Storm ISAAC

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BULLETIN
TROPICAL STORM ISAAC ADVISORY NUMBER  23...CORRECTED
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092012
500 PM EDT SUN AUG 26 2012

CORRECTED TROPICAL STORM WARNING AREA FOR FLORIDA PANHANDLE
 
...CENTER OF ISAAC PASSING JUST SOUTH OF KEY WEST...
 
 
SUMMARY OF 500 PM EDT...2100 UTC...INFORMATION
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LOCATION...24.2N 82.3W
ABOUT 40 MI...65 KM SW OF KEY WEST FLORIDA
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...992 MB...29.29 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
THE GOVERNMENT OF THE BAHAMAS HAS DISCONTINUED THE TROPICAL STORM
WARNING FOR THE NORTHWESTERN BAHAMAS.
 
THE GOVERNMENT OF CUBA HAS DISCONTINUED ALL WATCHES AND WARNINGS.
 
THE TROPICAL STORM WATCH FROM NORTH OF SEBASTIAN INLET TO FLAGLER
BEACH IS DISCONTINUED.
 
THE HURRICANE WARNING IS CHANGED TO A TROPICAL STORM WARNING FOR THE
FLORIDA KEYS INCLUDING THE DRY TORTUGAS AND FLORIDA BAY.
 
THE HURRICANE WARNING FOR THE WEST COAST OF FLORIDA FROM BONITA
BEACH SOUTHWARD TO OCEAN REEF IS CHANGED TO A TROPICAL STORM
WARNING.

THE TROPICAL STROM WARNING ALONG THE FLORIDA PANHANDLE HAS BEEN
EXTENDED WESTWARD TO EAST OF DESTIN. 
 
THE HURRICANE WATCH IS CHANGED TO A HURRICANE WARNING FOR THE
NORTHERN GULF OF MEXICO COAST FROM EAST OF MORGAN CITY LOUSIANA TO
DESTIN FLORIDA...INCLUDING METROPOLITAN NEW ORLEANS...LAKE
PONTCHARTRAIN...AND LAKE MAUREPAS.
 
THE TROPICAL STORM WARNING FROM SUWANNEE RIVER TO TARPON SPRINGS IS
DISCONTINUED.
 
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 SEBASTIAN 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...IN THIS CASE WITHIN THE NEXT 24
HOURS. 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.
  
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 48-HOUR OUTLOOK
------------------------------
AT 500 PM EDT...2100 UTC...THE CENTER OF TROPICAL STORM ISAAC WAS
LOCATED NEAR LATITUDE 24.2 NORTH...LONGITUDE 82.3 WEST. ISAAC IS
MOVING TOWARD THE WEST-NORTHWEST NEAR 16 MPH...26 KM/H...AND 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 IS EXPECTED TO MOVE AWAY FROM THE FLORIDA KEYS TONIGHT...
MOVE OVER THE EASTERN GULF OF MEXICO ON MONDAY...AND APPROACH THE
NORTHERN GULF COAST ON TUESDAY.
 
MAXIMUM SUSTAINED WINDS ARE NEAR 60 MPH...95 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
TWO.
 
TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 205 MILES...335 KM
FROM THE CENTER.  SMITH SHOAL LIGHT...NEAR KEY WEST...REPORTED A
WIND GUST TO 70 MPH...113 KM/H...AND VIRGINIA KEY REPORTED A WIND
GUST TO 66 MPH...106 KM/H.
 
ESTIMATED MINIMUM CENTRAL PRESSURE IS 992 MB...29.29 INCHES.
 
 
HAZARDS AFFECTING LAND
----------------------
RAINFALL...TOTAL RAINFALL ACCUMULATIONS OF 4 TO 7 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.

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
* CENTRAL AND WESTERN CUBA...1 TO 3 FT
* NORTHWESTERN BAHAMAS...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 THOUGH TONIGHT.

SURF...DANGEROUS SURF AND RIP CURRENT CONDITIONS WILL CONTINUE TO
AFFECT THE CENTRAL AND NORTHWESTERN BAHAMAS...CENTRAL CUBA...THE
FLORIDA PENINSULA AND THE FLORIDA KEYS DURING THE NEXT COUPLE OF
DAYS.  PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE FOR
MORE INFORMATION.
 
 
NEXT ADVISORY
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NEXT INTERMEDIATE ADVISORY...800 PM EDT.
NEXT COMPLETE ADVISORY...1100 PM EDT.
 
$$
FORECASTER PASCH/ROBERTS
 
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