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TROPICAL STORM HELENE FORECAST/ADVISORY NUMBER  13
NATIONAL WEATHER SERVICE MIAMI FL   AL1200
1500Z THU SEP 21 2000
 
...CORRECT PEAR RIVER TO PEARL RIVER IN WARNINGS SECTION...

AT 10 AM CDT...1500Z...A TROPICAL STORM WARNING IS IN EFFECT FROM
THE MOUTH OF THE PEARL RIVER...ON THE LOUISIANA-MISSISSIPPI
BORDER...EASTWARD TO THE MOUTH OF THE AUCILLA RIVER FLORIDA.  SMALL
CRAFT SHOULD REMAIN IN PORT FROM THE MOUTH OF THE PEARL RIVER TO THE
MOUTH OF THE MISSISSIPPI RIVER.
 
TROPICAL STORM CENTER LOCATED NEAR 26.6N  87.2W AT 21/1500Z
POSITION ACCURATE WITHIN  30 NM
 
PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 340 DEGREES AT 11 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB
MAX SUSTAINED WINDS  45 KT WITH GUSTS TO  55 KT.
34 KT....... 75NE  75SE   0SW   0NW.
12 FT SEAS.. 75NE  75SE   0SW   0NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT.  RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.
 
REPEAT...CENTER LOCATED NEAR 26.6N  87.2W AT 21/1500Z
AT 21/1200Z CENTER WAS LOCATED NEAR 26.1N  87.0W
 
FORECAST VALID 22/0000Z 28.3N  87.5W
MAX WIND  50 KT...GUSTS  60 KT.
50 KT... 40NE  40SE   0SW   0NW.
34 KT... 90NE  90SE  30SW  30NW.
 
FORECAST VALID 22/1200Z 30.4N  87.0W
MAX WIND  55 KT...GUSTS  65 KT.
50 KT... 40NE  40SE   0SW   0NW.
34 KT... 90NE  90SE  30SW  30NW.
 
FORECAST VALID 23/0000Z 32.0N  85.5W...INLAND
MAX WIND  30 KT...GUSTS  40 KT.

STORM SURGE FLOODING OF 3 TO 5 FT ABOVE NORMAL TIDE LEVELS...WITH
HIGHER LEVELS IN BAYS...ACCOMPANIED BY BATTERING WAVES...IS LIKELY
NEAR AND TO THE EAST OF WHERE THE CENTER MAKES LANDFALL.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 26.6N  87.2W
 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE
 
OUTLOOK VALID 23/1200Z 33.5N  82.5W...DISSIPATING
MAX WIND  20 KT...GUSTS  30 KT.
 
FORECAST VALID 24/1200Z...DISSIPATED
 
NEXT ADVISORY AT 21/2100Z
 
FORECASTER BEVEN
 
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