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

...LENNY BATTERING 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 3 PM AST...1900Z...THE EYE OF HURRICANE LENNY WAS LOCATED NEAR
LATITUDE 18.0 NORTH...LONGITUDE  63.2 WEST OR VERY NEAR ST. MAARTEN.
 
LENNY IS DRIFTING EAST-NORTHEASTWARD. HOWEVER...A SLOW NORTHEASTWARD
MOTION SHOULD BEGIN LATER TODAY.  THIS MOTION SHOULD CONTINUE TO
BRING THE CORE OF THE HURRICANE OVER THE ISLANDS OF SABA...ST.
MAARTEN...AND ANGUILLA TODAY.
 
MAXIMUM SUSTAINED WINDS HAVE DECREASED TO NEAR 130 MPH...210 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 IS EXPERIENCING HURRICANE FORCE
WINDS AT THIS TIME.   
 
MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE PLANE WAS 966 MB
...28.52 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 3 PM AST POSITION...18.0 N... 63.2 W.  MOVEMENT
DRIFTING EASTWARD.  MAXIMUM SUSTAINED WINDS...130 MPH.  MINIMUM
CENTRAL PRESSURE... 966 MB.
 
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
5 PM AST.
 
AVILA
 
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