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HURRICANE GERT FORECAST/ADVISORY NUMBER  18
NATIONAL WEATHER SERVICE MIAMI FL   AL0999
2100Z WED SEP 15 1999
  
HURRICANE CENTER LOCATED NEAR 17.6N  50.7W AT 15/2100Z
POSITION ACCURATE WITHIN  15 NM
 
PRESENT MOVEMENT TOWARD THE WEST OR 275 DEGREES AT 11 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  930 MB
EYE DIAMETER  25 NM
MAX SUSTAINED WINDS 130 KT WITH GUSTS TO 160 KT
64 KT....... 40NE  40SE  40SW  40NW
50 KT....... 80NE  80SE  80SW  80NW
34 KT.......150NE 125SE 125SW 150NW
12 FT SEAS..200NE 200SE 200SW 200NW
ALL QUADRANT RADII IN NAUTICAL MILES
 
REPEAT...CENTER LOCATED NEAR 17.6N  50.7W AT 15/2100Z
AT 15/1800Z CENTER WAS LOCATED NEAR 17.6N  50.1W
 
FORECAST VALID 16/0600Z 17.8N  52.4W
MAX WIND 130 KT...GUSTS 160 KT
64 KT... 40NE  40SE  40SW  40NW
50 KT... 80NE  80SE  80SW  80NW
34 KT...150NE 125SE 125SW 150NW
 
FORECAST VALID 16/1800Z 18.5N  54.5W
MAX WIND 125 KT...GUSTS 150 KT
64 KT... 40NE  40SE  40SW  40NW
50 KT... 80NE  80SE  80SW  80NW
34 KT...150NE 125SE 125SW 150NW
 
FORECAST VALID 17/0600Z 19.2N  56.0W
MAX WIND 125 KT...GUSTS 150 KT
64 KT... 40NE  40SE  40SW  40NW
50 KT... 80NE  80SE  80SW  80NW
34 KT...150NE 125SE 125SW 150NW
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 17.6N  50.7W
 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE
 
OUTLOOK VALID 17/1800Z 20.5N  58.0W
MAX WIND 125 KT...GUSTS 150 KT
50 KT... 80NE  80SE  80SW  80NW
 
OUTLOOK VALID 18/1800Z 23.5N  61.0W
MAX WIND 125 KT...GUSTS 150 KT
50 KT... 80NE  80SE  80SW  80NW
 
NEXT ADVISORY AT 16/0300Z
 
AVILA
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT4 AND WMO HEADER WTNT74 KNHC.
 
 
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