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BULLETIN
HURRICANE GERT ADVISORY NUMBER  17
NATIONAL WEATHER SERVICE MIAMI FL
11 AM AST WED SEP 15 1999

...AND YET ANOTHER CATEGORY FOUR HURRICANE...
 
AT 11 AM AST...1500Z...THE CENTER OF HURRICANE GERT WAS LOCATED NEAR
LATITUDE 17.6 NORTH...LONGITUDE  49.5 WEST OR ABOUT 800 MILES...
1295 KM...EAST OF THE NORTHERN LEEWARD ISLANDS.
 
GERT IS MOVING TOWARD THE WEST NEAR 13 MPH ...20 KM/HR...AND THIS
MOTION IS EXPECTED TO CONTINUE DURING THE NEXT 24 HOURS.
 
MAXIMUM SUSTAINED WINDS HAVE INCREASED TO 135 MPH...215 KM/HR...WITH
HIGHER GUSTS. THIS MAKES GERT THE FOURTH CATEGORY FOUR HURRICANE ON
THE SAFFIR/SIMPSON SCALE OF THE 1999 HURRICANE SEASON.  

SOME FLUCTUATIONS IN INTENSITY ARE LIKELY DURING THE NEXT DAY OR
TWO.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO  35 MILES... 55 KM...
FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 140 MILES...220 KM.
 
ESTIMATED MINIMUM CENTRAL PRESSURE IS  948 MB...27.99 INCHES.
 
REPEATING THE 11 AM AST POSITION...17.6 N... 49.5 W.  MOVEMENT
TOWARD...WEST NEAR 13 MPH.  MAXIMUM SUSTAINED WINDS...135 MPH. 
MINIMUM CENTRAL PRESSURE... 948 MB.
 
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
5 PM AST.
 
AVILA
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT4 AND WMO HEADER WTNT74 KNHC.
 
 
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