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HURRICANE ISAAC FORECAST/ADVISORY NUMBER 20
NATIONAL WEATHER SERVICE MIAMI FL AL1300
0900Z TUE SEP 26 2000
HURRICANE CENTER LOCATED NEAR 18.7N 43.0W AT 26/0900Z
POSITION ACCURATE WITHIN 20 NM
PRESENT MOVEMENT TOWARD THE WEST NORTHWEST OR 300 DEGREES AT 9 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 970 MB
MAX SUSTAINED WINDS 90 KT WITH GUSTS TO 110 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 18.7N 43.0W AT 26/0900Z
AT 26/0600Z CENTER WAS LOCATED NEAR 18.5N 42.6W
FORECAST VALID 26/1800Z 19.3N 44.2W
MAX WIND 90 KT...GUSTS 110 KT.
64 KT... 25NE 25SE 25SW 25NW.
50 KT... 60NE 45SE 45SW 60NW.
34 KT...140NE 120SE 100SW 140NW.
FORECAST VALID 27/0600Z 20.3N 46.0W
MAX WIND 90 KT...GUSTS 110 KT.
64 KT... 25NE 25SE 25SW 25NW.
50 KT... 60NE 45SE 45SW 60NW.
34 KT...140NE 120SE 100SW 140NW.
FORECAST VALID 27/1800Z 21.4N 47.9W
MAX WIND 90 KT...GUSTS 110 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 18.7N 43.0W
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE
OUTLOOK VALID 28/0600Z 23.0N 50.5W
MAX WIND 90 KT...GUSTS 110 KT.
50 KT... 60NE 45SE 45SW 60NW.
OUTLOOK VALID 29/0600Z 27.0N 55.5W
MAX WIND 90 KT...GUSTS 110 KT.
50 KT... 60NE 45SE 45SW 60NW.
NEXT ADVISORY AT 26/1500Z
FORECASTER FRANKLIN
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