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HURRICANE LENNY INTERMEDIATE ADVISORY NUMBER 21A
NATIONAL WEATHER SERVICE MIAMI FL
1 PM AST THU NOV 18 1999

...LENNY DRIFTING EASTWARD...EYEWALL NEARING ST. MAARTEN...
 
A HURRICANE WARNING REMAINS IN EFFECT FOR THE U.S. AND BRITISH
VIRGIN ISLANDS AND FOR DUTCH ST. MAARTEN...FRENCH ST. MARTIN...ST.
BARTHELEMEY...ANGUILLA...SABA...ST. EUSTATIUS ...ST.KITTS...
NEVIS...MONTSERRAT ...ANTIGUA...AND BARBUDA.

A TROPICAL STORM WARNING REMAINS IN EFFECT FOR CULEBRA AND
VIEQUES.

AT 1 PM AST...1700Z...THE EYE OF HURRICANE LENNY WAS LOCATED NEAR
LATITUDE 17.9 NORTH...LONGITUDE  63.2 WEST JUST TO THE SOUTHWEST OF
OF ST. MAARTEN.
 
LENNY IS DRIFTING EASTWARD.  HOWEVER...A SLOW EAST-NORTHEAST TO
NORTHEAST TRACK SHOULD BEGIN LATER TODAY.  THIS MOTION SHOULD BRING
THE CORE OF THE HURRICANE OVER THE ISLANDS OF SABA...ST. MAARTEN
...AND ANGUILLA TODAY.
 
MAXIMUM SUSTAINED WINDS ARE NEAR 135 MPH...215 KM/HR...WITH HIGHER
GUSTS ESPECIALLY OVER UNPROTECTED SOUTH AND WEST FACING HARBORS.
STRONGER SUSTAINED WINDS COULD BE EXPERIENCED IN MOUNTAINOUS AREAS.
SOME FLUCTUATIONS IN STRENGTH ARE LIKELY DURING THE NEXT 24 HOURS. 
 
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO  60 MILES... 95 KM...
FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 185 MILES...295 KM.  ST. MAARTEN RECENTLY REPORTED WIND GUSTS TO
108 MPH...173 KPH AND ST. BARTHELEMY REPORTED GUSTS TO 124 MPH
...200 KPH. 
 
ESTIMATED MINIMUM CENTRAL PRESSURE IS  955 MB...28.20 INCHES.
 
RAINFALL TOTALS OF 10 TO 15 INCHES...WITH LOCALLY HIGHER AMOUNTS IN
MOUNTAINOUS REGIONS ARE ASSOCIATED WITH THE HURRICANE.  THESE RAINS
CAN PRODUCE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES.  
 
STORM SURGE FLOODING OF 5 TO 8 FT ABOVE NORMAL...ACCOMPANIED BY
LARGE AND DANGEROUS BATTERING WAVES...IS EXPECTED NEAR THE CENTER
IN THE WARNED AREA.
 
REPEATING THE 1 PM AST POSITION...17.9 N... 63.2 W.  MOVEMENT
DRIFTING EASTWARD.  MAXIMUM SUSTAINED WINDS...135 MPH.  MINIMUM
CENTRAL PRESSURE... 955 MB.
 
THE NEXT INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL
HURRICANE CENTER AT 3 PM AST FOLLOWED BY THE NEXT COMPLETE
ADVISORY AT 5 PM AST.
 
AVILA
 
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