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TROPICAL STORM JOYCE ADVISORY NUMBER  18
NATIONAL WEATHER SERVICE MIAMI FL
11 PM AST FRI SEP 29 2000

...JOYCE WEAKENS SLIGHTLY...BUT EXPECTED TO STRENGTHEN AGAIN 
ON SATURDAY...
 
AT 11 PM AST...0300Z...THE CENTER OF TROPICAL STORM JOYCE
WAS LOCATED NEAR LATITUDE 10.5 NORTH...LONGITUDE  53.0 WEST
OR ABOUT 480 MILES...770 KM...EAST-SOUTHEAST OF BARBADOS.
 
JOYCE IS MOVING TOWARD THE WEST NEAR 15 MPH...24 KM/HR...
AND THIS GENERAL MOTION IS EXPECTED TO CONTINUE FOR THE NEXT
12 TO 24 HOURS WITH A GRADUAL TURN TOWARD THE WEST-NORTHWEST. 
ON THIS TRACK...TROPICAL STORM WATCHES OR WARNINGS MAY BE REQUIRED
FOR PORTIONS OF THE SOUTHERN LESSER ANTILLES ON SATURDAY.
 
MAXIMUM SUSTAINED WINDS ARE NEAR  50 MPH... 85 KM/HR...WITH HIGHER
GUSTS.  LITTLE CHANGE IN STRENGTH IS FORECAST DURING THE NEXT
12 HOURS...WITH SOME SLOW STRENGTHENING AFTERWARDS.
 
TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO  70 MILES
...110 KM FROM THE CENTER.
 
ESTIMATED MINIMUM CENTRAL PRESSURE IS 1000 MB...29.53 INCHES.
  
REPEATING THE 11 PM AST POSITION...10.5 N... 53.0 W.  MOVEMENT
TOWARD...WEST NEAR 15 MPH.  MAXIMUM SUSTAINED
WINDS... 50 MPH.  MINIMUM CENTRAL PRESSURE...1000 MB.
 
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER 
AT 5 AM AST...SATURDAY.
 
FORECASTER STEWART
  
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