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HURRICANE GERT ADVISORY NUMBER  27
NATIONAL WEATHER SERVICE MIAMI FL
11 PM AST FRI SEP 17 1999

....POWERFUL HURRICANE GERT MOVING NORTHWESTWARD...A POTENTIAL
THREAT TO BERMUDA...

INTERESTS IN BERMUDA SHOULD MONITOR THE PROGRESS OF GERT OVER THE
WEEKEND. 

AT 11 PM AST...0300Z...THE CENTER OF HURRICANE GERT WAS LOCATED NEAR
LATITUDE 21.3 NORTH...LONGITUDE  57.1 WEST OR ABOUT 900 MILES...1450
KM...SOUTH-SOUTHEAST OF BERMUDA.
 
GERT IS MOVING TOWARD THE NORTHWEST NEAR  8 MPH...13 KM/HR...AND
THIS GENERAL MOTION IS EXPECTED TO CONTINUE FOR THE NEXT 24 HOURS. 
ON THIS TRACK...GERT WILL BE MOVING WELL NORTH OF THE LEEWARD
ISLANDS ON SATURDAY.
 
MAXIMUM SUSTAINED WINDS ARE NEAR 125 MPH...205 KM/HR...WITH HIGHER
GUSTS.  GERT IS A CATEGORY THREE HURRICANE ON THE SAFFIR/SIMPSON
HURRICANE SCALE.  NOT MUCH CHANGE IN STRENGTH IS LIKELY DURING THE
NEXT 12 TO 24 HOURS.
 
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 120 MILES...195 KM...
FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP
TO 230 MILES...370 KM MAINLY TO THE NORTHEAST OF THE CENTER.
 
ESTIMATED MINIMUM CENTRAL PRESSURE IS  950 MB...28.05 INCHES.
 
REPEATING THE 11 PM AST POSITION...21.3 N... 57.1 W.  MOVEMENT
TOWARD...NORTHWEST NEAR  8 MPH.  MAXIMUM SUSTAINED WINDS...125 MPH. 
MINIMUM CENTRAL PRESSURE... 950 MB.
 
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
5 AM AST...SATURDAY.
 
PASCH
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT4 AND WMO HEADER WTNT74 KNHC.
 
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