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TROPICAL STORM FLOYD ADVISORY NUMBER  11
NATIONAL WEATHER SERVICE MIAMI FL
5 AM AST FRI SEP 10 1999

...FLOYD LIKELY TO BECOME A HURRICANE LATER THIS MORNING...
 
...A TROPICAL STORM WATCH IS IN EFFECT FOR THE FOLLOWING CARIBBEAN
ISLANDS...ANTIGUA...BARBUDA...ANGUILLA...AND DUTCH SAINT MAARTEN...
FRENCH SAINT MARTIN AND SAINT BARTHELEMY.
 
ALL INTERESTS IN THE NORTHEASTERN CARIBBEAN SHOULD MONITOR THE
PROGRESS OF FLOYD.
 
AT 5 AM AST...0900Z...THE CENTER OF TROPICAL STORM FLOYD
WAS LOCATED NEAR LATITUDE 18.9 NORTH...LONGITUDE  58.7 WEST
OR ABOUT 215 MILES...350 KM...EAST-NORTHEAST OF BARBUDA IN THE
NORTHERN LEEWARD ISLANDS.
 
FLOYD IS MOVING TOWARD THE WEST-NORTHWEST NEAR 12 MPH...19 KM/HR...
AND THIS GENERAL MOTION IS EXPECTED TO CONTINUE TODAY.  ON THIS
TRACK...THE CENTER OF FLOYD WOULD PASS NORTH OF THE LEEWARD
ISLANDS.  HOWEVER...ANY DEVIATION TO THE LEFT WOULD BRING TROPICAL
STORM CONDITIONS TO THE NORTHERNMOST ISLANDS OF THE NORTHEASTERN
CARIBBEAN.
 
MAXIMUM SUSTAINED WINDS ARE NEAR  70 MPH...110 KM/HR...WITH HIGHER
GUSTS.  SOME INCREASE IN STRENGTH IS FORECAST DURING THE NEXT 12 TO
24 HOURS.
 
TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 175 MILES
...280 KM FROM THE CENTER.
 
AN AIR FORCE HURRICANE HUNTER PLANE RECENTLY REPORTED THAT THE
MINIMUM CENTRAL PRESSURE HAS FALLEN TO 985 MB...29.09 INCHES.
 
REPEATING THE 5 AM AST POSITION...18.9 N... 58.7 W.  MOVEMENT
TOWARD...WEST NORTHWEST NEAR 12 MPH.  MAXIMUM SUSTAINED WINDS... 70
MPH.  MINIMUM CENTRAL PRESSURE... 985 MB.
 
AN INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE
CENTER AT 8 AM AST FOLLOWED BY THE NEXT COMPLETE ADVISORY AT 11 AM
AST.
 
PASCH
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT3 AND WMO HEADER WTNT73 KNHC.
 
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