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HURRICANE DENNIS FORECAST/ADVISORY NUMBER  20
NATIONAL WEATHER SERVICE MIAMI FL   AL0599
2100Z SAT AUG 28 1999
...CORRECTED ADVISORY NUMBER TO 20 
A TROPICAL STORM WARNING REMAINS IN EFFECT FOR THE EAST COAST OF
FLORIDA FROM SEBASTIAN INLET TO FLAGLER BEACH. A HURRICANE WATCH
REMAINS IN EFFECT FROM SEBASTIAN INLET NORTHWARD TO FERNANDINA
BEACH.
 
IT MAY BE NECESSARY TO SHIFT THE WATCHES AND WARNINGS NORTHWARD AS
DENNIS MOVES ON A TRACK PARALLEL TO THE UNITED STATES SOUTHEAST
COAST.  COASTAL INTERESTS IN GEORGIA...SOUTH AND NORTH CAROLINA
SHOULD CLOSELY MONITOR THE PROGRESS OF DENNIS.
 
AT 5 PM EST...2100 UTC...A HURRICANE WARNING FOR THE ABACOS AND
GRAND BAHAMA ISLANDS HAS BEEN DISCONTINUED.  RESIDENTS SHOULD REMAIN
VIGILANT UNTIL WINDS AND SEAS SUBSIDE.
 
HURRICANE CENTER LOCATED NEAR 28.0N  77.6W AT 28/2100Z
POSITION ACCURATE WITHIN  15 NM
 
PRESENT MOVEMENT TOWARD THE NORTHWEST OR 325 DEGREES AT  5 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  969 MB
EYE DIAMETER  35 NM
MAX SUSTAINED WINDS  90 KT WITH GUSTS TO 110 KT
64 KT....... 50NE  25SE  20SW  25NW
50 KT.......100NE  60SE  30SW  90NW
34 KT.......140NE 125SE  75SW 120NW
12 FT SEAS..175NE 150SE 100SW 220NW
ALL QUADRANT RADII IN NAUTICAL MILES
 
REPEAT...CENTER LOCATED NEAR 28.0N  77.6W AT 28/2100Z
AT 28/1800Z CENTER WAS LOCATED NEAR 27.7N  77.4W
 
FORECAST VALID 29/0600Z 28.6N  78.0W
MAX WIND  95 KT...GUSTS 110 KT
64 KT... 35NE  25SE  20SW  20NW
50 KT...100NE  60SE  30SW  90NW
34 KT...140NE 125SE  75SW 120NW
 
FORECAST VALID 29/1800Z 29.8N  78.5W
MAX WIND 100 KT...GUSTS 120 KT
64 KT... 30NE  25SE  20SW  30NW
50 KT...100NE  75SE  30SW  90NW
34 KT...140NE 125SE  75SW 125NW
 
FORECAST VALID 30/0600Z 31.0N  78.7W
MAX WIND 100 KT...GUSTS 120 KT
64 KT... 30NE  25SE  20SW  30NW
50 KT...100NE  75SE  50SW  90NW
34 KT...140NE 125SE  75SW 125NW
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 28.0N  77.6W
 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE
 
OUTLOOK VALID 30/1800Z 32.0N  78.5W
MAX WIND 100 KT...GUSTS 120 KT
50 KT...100NE  75SE  50SW  90NW
 
OUTLOOK VALID 31/1800Z 33.5N  78.0W
MAX WIND 100 KT...GUSTS 120 KT
50 KT...100NE  75SE  50SW  90NW
 
NEXT ADVISORY AT 29/0300Z
 
AVILA
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT5 AND WMO HEADER WTNT75 KNHC.
 
 
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