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HURRICANE FLOYD INTERMEDIATE ADVISORY NUMBER 13A
NATIONAL WEATHER SERVICE MIAMI FL
8 PM AST FRI SEP 10 1999
 
...FLOYD GRADUALLY STRENGTHENING...

...A TROPICAL STORM WATCH REMAINS IN EFFECT FOR THE FOLLOWING
CARIBBEAN ISLANDS...ANTIGUA...BARBUDA...ANGUILLA...AND DUTCH SAINT
MAARTEN...FRENCH SAINT MARTIN AND SAINT BARTHELEMY BUT WILL LIKELY
BE DISCONTINUED TONIGHT.
 
INTERESTS IN THE BAHAMAS AND THE SOUTHEAST U.S. SHOULD MONITOR THE
PROGRESS OF THIS HURRICANE OVER THE WEEKEND.
 
AT 8 PM AST...0000Z...THE CENTER OF HURRICANE FLOYD WAS LOCATED NEAR
LATITUDE 20.8 NORTH...LONGITUDE  60.4 WEST OR ABOUT 395 MILES...640
KM...EAST-NORTHEAST OF SAN JUAN PUERTO RICO.
 
FLOYD IS MOVING TOWARD THE NORTHWEST NEAR 12 MPH...19 KM/HR.  A
GRADUAL TURN TO THE WEST-NORTHWEST IS EXPECTED BY LATE TOMORROW.  
ALTHOUGH THE CENTER OF FLOYD IS PASSING WELL TO THE NORTH OF THE
LEEWARD ISLANDS...RAINBANDS ON THE SOUTHEAST SIDE OF FLOYD MAY STILL
BRING SOME SQUALLY WEATHER TO THESE ISLANDS TONIGHT.
 
MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 85 MPH...135 KM/HR
...WITH HIGHER GUSTS.  FLOYD IS BECOMING BETTER ORGANIZED...AND SOME
STRENGTHENING IS EXPECTED DURING THE NEXT 24 HOURS.
 
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO  70 MILES...110 KM...
FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 175 MILES...280 KM.
 
THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE PLANE
WAS 971 MB...28.67 INCHES.
 
REPEATING THE 8 PM AST POSITION...20.8 N... 60.4 W.  MOVEMENT
TOWARD...NORTHWEST NEAR 12 MPH.  MAXIMUM SUSTAINED WINDS... 85 MPH. 
MINIMUM CENTRAL PRESSURE... 971 MB.
 
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
11 PM AST.
 
AVILA

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