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HURRICANE LENNY INTERMEDIATE ADVISORY NUMBER  20A
NATIONAL WEATHER SERVICE MIAMI FL
7 AM AST THU NOV 18 1999

...CORRECTED FOR ADVISORY TIME...

...EXTREMELY DANGEROUS LENNY STALLS AGAIN NEAR THE NORTHERN LEEWARD
ISLANDS...

A HURRICANE WARNING REMAINS IN EFFECT FOR CULEBRA...VIEQUES...THE
U.S. AND BRITISH VIRGIN ISLANDS. A HURRICANE WARNING ALSO REMAINS IN
EFFECT FOR DUTCH ST. MAARTEN...FRENCH ST. MARTIN...ST.
BARTHELEMEY...ANGUILLA...SABA...ST. EUSTATIUS...ST. KITTS...NEVIS...
MONTSERRAT...ANTIGUA...AND BARBUDA.
 
TROPICAL STORM WARNINGS REMAIN IN EFFECT EAST OF A PONCE-MANATI
LINE...INCLUDING SAN JUAN.
 
ALL INTERESTS ALONG COASTAL SECTIONS OF PUERTO RICO WEST OF A PONCE-
MANATI LINE SHOULD EXERCISE CAUTION UNTIL WINDS AND SEAS SUBSIDE.
 
AT 7 AM AST...1100Z...THE CENTER OF HURRICANE LENNY WAS LOCATED NEAR
LATITUDE 17.8 NORTH...LONGITUDE  63.6 WEST OR ABOUT 35 MILES...60
KM...WEST-SOUTHWEST OF ST. MAARTEN.
 
LENNY IS AGAIN NEARLY STATIONARY. A SLOW GENERALLY EAST-NORTHEAST
MOTION IS EXPECTED LATER TODAY. THIS MOTION SHOULD BRING THE EYEWALL
OF THE HURRICANE OVER THE ISLANDS OF SABA...ST. MAARTEN...AND
ANGUILLA LATER THIS MORNING.
 
REPORTS FROM AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT INDICATE
THAT LENNY HAS WEAKENED SLIGHTLY. MAXIMUM SUSTAINED WINDS ARE NOW
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. EVEN THOUGH LENNY HAS
WEAKENED...IT IS STILL A CATEGORY 4 HURRICANE ON THE SAFFIR-SIMPSON
SCALE. 
 
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.

THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY THE HURRICANE HUNTER
WAS 951 MB...28.08 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.  SAN JUAN
DOPPLER RADAR SHOWS BANDS OF HEAVY RAINS OVER PORTIONS OF PUERTO
RICO...THE VIRGIN ISLANDS...AND THE NORTHERN LEEWARD ISLANDS.
 
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 7 AM AST POSITION...17.8 N... 63.6 W.  MOVEMENT...
NEARLY STATIONARY.  MAXIMUM SUSTAINED WINDS...135 MPH.  MINIMUM
CENTRAL PRESSURE... 951 MB.
 
AN INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE
CENTER AT 9 AM AST FOLLOWED BY THE NEXT COMPLETE ADVISORY AT 11 AM
AST.
 
BEVEN
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT1 AND WMO HEADER WTNT71 KNHC.
 
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