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HURRICANE ISAAC FORECAST/ADVISORY NUMBER  21
NATIONAL WEATHER SERVICE MIAMI FL   AL1300
1500Z TUE SEP 26 2000
 
HURRICANE CENTER LOCATED NEAR 18.8N  44.4W AT 26/1500Z
POSITION ACCURATE WITHIN  20 NM
 
PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 290 DEGREES AT 10 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  975 MB
MAX SUSTAINED WINDS  80 KT WITH GUSTS TO  95 KT.
64 KT....... 25NE  25SE  25SW  25NW.
50 KT....... 60NE  45SE  45SW  60NW.
34 KT.......140NE 120SE 100SW 140NW.
12 FT SEAS..250NE 150SE 150SW 250NW.
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 18.8N  44.4W AT 26/1500Z
AT 26/1200Z CENTER WAS LOCATED NEAR 18.6N  43.9W
 
FORECAST VALID 27/0000Z 19.3N  45.9W
MAX WIND  75 KT...GUSTS  85 KT.
64 KT... 25NE  25SE  25SW  25NW.
50 KT... 60NE  45SE  45SW  60NW.
34 KT...140NE 120SE 100SW 140NW.
 
FORECAST VALID 27/1200Z 20.5N  48.0W
MAX WIND  75 KT...GUSTS  85 KT.
64 KT... 25NE  25SE  25SW  25NW.
50 KT... 60NE  45SE  45SW  60NW.
34 KT...140NE 120SE 100SW 140NW.
 
FORECAST VALID 28/0000Z 22.0N  50.0W
MAX WIND  80 KT...GUSTS  95 KT.
64 KT... 25NE  25SE  25SW  25NW.
50 KT... 60NE  45SE  45SW  60NW.
34 KT...140NE 120SE 100SW 140NW.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 18.8N  44.4W
 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE
 
OUTLOOK VALID 28/1200Z 23.5N  52.0W
MAX WIND  85 KT...GUSTS 105 KT.
50 KT... 60NE  45SE  45SW  60NW.
 
OUTLOOK VALID 29/1200Z 27.5N  56.5W
MAX WIND  85 KT...GUSTS 105 KT.
50 KT... 60NE  45SE  45SW  60NW.
 
NEXT ADVISORY AT 26/2100Z
 
FORECASTER PASCH
 
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