ZCZC MIATCMAT4 ALL
TTAA00 KNHC DDHHMM
TROPICAL STORM IVAN FORECAST/ADVISORY NUMBER   4
NATIONAL WEATHER SERVICE MIAMI FL   AL0998
0900Z MON SEP 21 1998
 
TROPICAL STORM CENTER LOCATED NEAR 17.4N  35.3W AT 21/0900Z
POSITION ACCURATE WITHIN  60 NM
 
PRESENT MOVEMENT TOWARD THE WEST NORTHWEST OR 295 DEGREES AT 12 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE 1005 MB
MAX SUSTAINED WINDS  35 KT WITH GUSTS TO  45 KT
34 KT....... 40NE  40SE  40SW  40NW
12 FT SEAS.. 40NE  40SE  40SW  40NW
ALL QUADRANT RADII IN NAUTICAL MILES
 
REPEAT...CENTER LOCATED NEAR 17.4N  35.3W AT 21/0900Z
AT 21/0600Z CENTER WAS LOCATED NEAR 17.1N  34.7W
 
FORECAST VALID 21/1800Z 18.0N  36.0W
MAX WIND  35 KT...GUSTS  45 KT
34 KT... 40NE  40SE  40SW  40NW
 
FORECAST VALID 22/0600Z 19.1N  38.0W
MAX WIND  30 KT...GUSTS  40 KT
 
FORECAST VALID 22/1800Z 20.5N  39.5W
MAX WIND  30 KT...GUSTS  40 KT
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 17.4N  35.3W
 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE
 
OUTLOOK VALID 23/0600Z 22.0N  41.5W
MAX WIND  30 KT...GUSTS  40 KT
 
OUTLOOK VALID 24/0600Z 25.0N  45.0W
MAX WIND  35 KT...GUSTS  45 KT
 
NEXT ADVISORY AT 21/1500Z
 
JARVINEN
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT4 AND WMO HEADER WTNT74 KNHC.
 
 
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