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BULLETIN
HURRICANE FLOYD ADVISORY NUMBER  21
NATIONAL WEATHER SERVICE MIAMI FL
5 PM AST SUN SEP 12 1999
 
AT 5 PM AST...2100Z...THE GOVERNMENT OF THE BAHAMAS HAS ISSUED A
HURRICANE WARNING FOR THE CENTRAL BAHAMAS...INCLUDING CAT
ISLAND...EXUMAS ISLANDS...LONG ISLAND...RUM CAY...AND SAN SALVADOR
ISLAND.
 
AT 5 PM AST...2100Z...THE GOVERNMENT OF THE BAHAMAS HAS ISSUED A
HURRICANE WATCH FOR THE NORTHWEST BAHAMAS...INCLUDING THE ABACO
ISLANDS...ANDROS ISLAND...BERRY ISLANDS...BIMINI...ELEUTHERA...GRAND
BAHAMA AND NEW PROVIDENCE ISLAND.
 
A TROPICAL STORM WARNING IS IN EFFECT FOR THE TURKS AND CAICOS
ISLANDS AND THE SOUTHEASTERN BAHAMAS.
 
A HURRICANE WATCH MAY BE REQUIRED FOR A PORTION OF THE FLORIDA EAST
COAST LATER TONIGHT OR EARLY ON MONDAY.
 
INTERESTS IN THE SOUTHEAST U.S. SHOULD MONITOR THE PROGRESS OF THIS
HURRICANE.
 
AT 5 PM AST...2100Z...THE CENTER OF HURRICANE FLOYD WAS LOCATED NEAR
LATITUDE 23.4 NORTH...LONGITUDE  68.2 WEST OR ABOUT 400 MILES...645
KM...EAST OF SAN SALVADOR IN THE CENTRAL BAHAMAS.
 
FLOYD IS MOVING JUST NORTH OF DUE WEST NEAR 14 MPH...22 KM/HR...AND
THIS GENERAL MOTION IS EXPECTED TO CONTINUE TONIGHT.
 
MAXIMUM SUSTAINED WINDS HAVE INCREASED TO 125 MPH...205 KM/HR...WITH
HIGHER GUSTS.  THIS MAKES FLOYD A STRONG CATEGORY THREE HURRICANE ON
THE SAFFIR-SIMPSON SCALE.  SOME ADDITIONAL INCREASE IN STRENGTH IS
EXPECTED DURING THE NEXT 24 HOURS.
 
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 115 MILES...185 KM...
FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 290 MILES...465 KM.
 
THE MOST RECENT MEASURED MINIMUM CENTRAL PRESSURE WAS 940 MB...27.76
INCHES.
 
STORM SURGE FLOODING OF 10 TO 15 FEET ABOVE NORMAL TIDE
LEVELS...WITH LARGE BATTERING WAVES...IS POSSIBLE IN THE HURRICANE
WARNING AREA.  

REPEATING THE 5 PM AST POSITION...23.4 N... 68.2 W.  MOVEMENT
TOWARD...WEST NEAR 14 MPH.  MAXIMUM SUSTAINED WINDS...125 MPH. 
MINIMUM CENTRAL PRESSURE... 940 MB.
 
AN INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE
CENTER AT 8 PM AST FOLLOWED BY THE NEXT COMPLETE ADVISORY AT 11 PM
AST.
 
FRANKLIN
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT3 AND WMO HEADER WTNT73 KNHC.
 
 
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