ZCZC MIATCMAT4 ALL TTAA00 KNHC DDHHMM TROPICAL STORM IVAN FORECAST/ADVISORY NUMBER 11 NATIONAL WEATHER SERVICE MIAMI FL AL0998 0300Z WED SEP 23 1998 TROPICAL STORM CENTER LOCATED NEAR 25.8N 37.8W AT 23/0300Z POSITION ACCURATE WITHIN 45 NM PRESENT MOVEMENT TOWARD THE NORTH NORTHWEST OR 340 DEGREES AT 12 KT ESTIMATED MINIMUM CENTRAL PRESSURE 997 MB MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT 34 KT.......100NE 100SE 50SW 75NW 12 FT SEAS..150NE 125SE 75SW 125NW ALL QUADRANT RADII IN NAUTICAL MILES REPEAT...CENTER LOCATED NEAR 25.8N 37.8W AT 23/0300Z AT 23/0000Z CENTER WAS LOCATED NEAR 25.2N 37.6W FORECAST VALID 23/1200Z 27.4N 38.6W MAX WIND 45 KT...GUSTS 55 KT 34 KT...100NE 100SE 50SW 75NW FORECAST VALID 24/0000Z 29.1N 39.4W MAX WIND 45 KT...GUSTS 55 KT 34 KT...100NE 100SE 50SW 75NW FORECAST VALID 24/1200Z 30.6N 40.0W MAX WIND 45 KT...GUSTS 55 KT 34 KT...100NE 100SE 50SW 75NW REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 25.8N 37.8W EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE OUTLOOK VALID 25/0000Z 32.3N 40.5W MAX WIND 45 KT...GUSTS 55 KT OUTLOOK VALID 26/0000Z 36.0N 40.0W MAX WIND 45 KT...GUSTS 55 KT NEXT ADVISORY AT 23/0900Z GUINEY STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE FOUND UNDER AFOS HEADER MIASPFAT4 AND WMO HEADER WTNT74 KNHC. NNNN