Hurricane Isaac
Public Advisory 7A
591
WTNT34 KNHC 222333
TCPAT4
BULLETIN
TROPICAL STORM ISAAC INTERMEDIATE ADVISORY NUMBER 7A
NWS NATIONAL HURRICANE CENTER MIAMI FL AL092012
800 PM AST WED AUG 22 2012
...ISAAC ENTERS THE EASTERN CARIBBEAN...
SUMMARY OF 800 PM AST...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...15.7N 62.2W
ABOUT 65 MI...110 KM SW OF GUADELOUPE
ABOUT 320 MI...510 KM SE OF SAN JUAN PUERTO RICO
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...W OR 265 DEGREES AT 21 MPH...33 KM/H
MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
NONE.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
A HURRICANE WARNING IS IN EFFECT FOR...
* SOUTH COAST OF DOMINICAN REPUBLIC FROM ISLA SAONA WESTWARD TO THE
HAITI-DOMINICAN REPUBLIC SOUTHERN BORDER
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* MARTINIQUE
* DOMINICA
* GUADELOUPE AND THE SURROUNDING ISLANDS...AND ST. MARTIN
* ST. KITTS...NEVIS...ANTIGUA...BARBUDA...MONTSERRAT...AND ANGUILLA
* SABA...ST. EUSTATIUS...AND ST. MAARTEN
* BRITISH VIRGIN ISLANDS
* PUERTO RICO...VIEQUES...CULEBRA...AND THE U.S. VIRGIN ISLANDS
A HURRICANE WATCH IS IN EFFECT FOR...
* PUERTO RICO...VIEQUES...CULEBRA...AND THE U.S. AND BRITISH VIRGIN
ISLANDS
* HAITI
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* NORTH COAST OF DOMINICAN REPUBLIC FROM THE HAITI-DOMINICAN
REPUBLIC NORTHERN BORDER EASTWARD TO NORTH OF ISLA SAONA
A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
SOMEWHERE WITHIN THE WARNING AREA. 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.
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS.
INTERESTS IN CUBA AND JAMAICA SHOULD MONITOR THE PROGRESS OF ISAAC.
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 800 PM AST...0000 UTC...THE CENTER OF TROPICAL STORM ISAAC WAS
LOCATED NEAR LATITUDE 15.7 NORTH...LONGITUDE 62.2 WEST. ISAAC IS
MOVING TOWARD THE WEST NEAR 21 MPH...33 KM/H...AND THIS GENERAL
MOTION IS EXPECTED TO CONTINUE FOR THE NEXT COUPLE OF DAYS. ON THE
FORECAST TRACK...THE CENTER OF ISAAC SHOULD MOVE AWAY FROM THE
LEEWARD ISLANDS DURING THE NEXT FEW HOURS...PASS NEAR OR SOUTH
OF THE VIRGIN ISLANDS AND PUERTO RICO ON THURSDAY...AND APPROACH
THE DOMINICAN REPUBLIC THURSDAY NIGHT AND FRIDAY.
MAXIMUM SUSTAINED WINDS ARE NEAR 45 MPH...75 KM/H...WITH HIGHER
GUSTS. SOME STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS...
AND ISAAC COULD BECOME A HURRICANE THURSDAY NIGHT OR FRIDAY.
TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 140 MILES...220 KM
MAINLY TO THE NORTH AND EAST OF THE CENTER.
THE ESTIMATED MINIMUM CENTRAL PRESSURE BASED ON HURRICANE HUNTER
AIRCRAFT AND SURFACE OBSERVATIONS IS 1004 MB...29.65 INCHES.
HAZARDS AFFECTING LAND
----------------------
WIND...TROPICAL STORM CONDITIONS CONTINUE TO SPREAD ACROSS PORTIONS
OF THE LEEWARD ISLANDS. TROPICAL STORM CONDITIONS ARE EXPECTED
OVER PUERTO RICO AND THE U.S. AND BRITISH VIRGIN ISLANDS ON
THURSDAY. HURRICANE CONDITIONS ARE POSSIBLE OVER PUERTO RICO AND
THE U.S. VIRGIN ISLANDS ON THURSDAY. HURRICANE CONDITIONS ARE
EXPECTED OVER PORTIONS OF THE DOMINICAN REPUBLIC BY THURSDAY NIGHT.
RAINFALL...TOTAL RAIN ACCUMULATIONS OF 4 TO 8 INCHES ARE POSSIBLE
OVER THE NORTHERN WINDWARD ISLANDS AND THE LEEWARD ISLANDS. TOTAL
RAIN ACCUMULATIONS OF 1 TO 3 INCHES WITH MAXIMUM AMOUNTS OF 6
INCHES ARE POSSIBLE OVER PUERTO RICO AND THE VIRGIN ISLANDS. TOTAL
RAINFALL ACCUMULATIONS OF 8 TO 12 INCHES...WITH MAXIMUM AMOUNTS OF
20 INCHES...ARE POSSIBLE OVER HISPANIOLA. THESE RAINS COULD CAUSE
LIFE-THREATENING FLASH FLOODS AND MUD SLIDES.
STORM SURGE...A STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS
3 TO 5 FEET ABOVE NORMAL TIDE LEVELS ALONG THE SOUTHERN COAST OF THE
DOMINICAN REPUBLIC. A STORM SURGE WILL RAISE WATER LEVELS BY AS
MUCH AS 1 TO 3 FEET ABOVE NORMAL TIDE LEVELS IN THE NORTHERN
LEEWARD ISLANDS...PUERTO RICO...AND THE U.S. AND BRITISH VIRGIN
ISLANDS. NEAR THE COAST...THE SURGE WILL BE ACCOMPANIED BY
DANGEROUS WAVES.
SURF...DANGEROUS SURF AND RIP CURRENT CONDITIONS WILL AFFECT THE
WINDWARD ISLANDS...LEEWARD ISLANDS...VIRGIN ISLANDS...AND PUERTO
RICO DURING THE NEXT COUPLE OF DAYS. PLEASE CONSULT PRODUCTS FROM
YOUR LOCAL WEATHER OFFICE FOR MORE INFORMATION.
NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY...1100 PM AST.
$$
FORECASTER PASCH/BLAKE
