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HURRICANE GERT FORECAST/ADVISORY NUMBER  21
NATIONAL WEATHER SERVICE MIAMI FL   AL0999
1500Z THU SEP 16 1999
  
HURRICANE CENTER LOCATED NEAR 18.3N  52.9W AT 16/1500Z
POSITION ACCURATE WITHIN  15 NM
 
PRESENT MOVEMENT TOWARD THE WEST OR 275 DEGREES AT  8 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  941 MB
EYE DIAMETER  18 NM
MAX SUSTAINED WINDS 125 KT WITH GUSTS TO 150 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 18.3N  52.9W AT 16/1500Z
AT 16/1200Z CENTER WAS LOCATED NEAR 18.2N  52.5W
 
FORECAST VALID 17/0000Z 18.5N  54.0W
MAX WIND 120 KT...GUSTS 145 KT
64 KT... 40NE  40SE  40SW  40NW
50 KT... 80NE  80SE  80SW  80NW
34 KT...150NE 125SE 125SW 150NW
 
FORECAST VALID 17/1200Z 19.5N  55.5W
MAX WIND 120 KT...GUSTS 145 KT
64 KT... 40NE  40SE  40SW  40NW
50 KT... 80NE  80SE  80SW  80NW
34 KT...150NE 125SE 125SW 150NW
 
FORECAST VALID 18/0000Z 20.5N  57.0W
MAX WIND 115 KT...GUSTS 140 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 18.3N  52.9W
 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE
 
OUTLOOK VALID 18/1200Z 22.5N  58.5W
MAX WIND 115 KT...GUSTS 140 KT
50 KT... 80NE  80SE  80SW  80NW
 
OUTLOOK VALID 19/1200Z 27.0N  61.0W
MAX WIND 115 KT...GUSTS 140 KT
50 KT... 80NE  80SE  80SW  80NW
 
NEXT ADVISORY AT 16/2100Z
 
AVILA
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT4 AND WMO HEADER WTNT74 KNHC.
 
 
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