Hurricane Isaac

Forecast Advisory 12

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892
WTNT24 KNHC 301442
TCMAT4
HURRICANE ISAAC FORECAST/ADVISORY NUMBER 12
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL092006
1500 UTC SAT SEP 30 2006

INTERESTS IN NOVA SCOTIA AND NEWFOUNDLAND CANADA SHOULD MONITOR THE
PROGRESS OF ISAAC.

HURRICANE CENTER LOCATED NEAR 30.9N 58.7W AT 30/1500Z
POSITION ACCURATE WITHIN 20 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 305 DEGREES AT 6 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 992 MB
EYE DIAMETER 25 NM
MAX SUSTAINED WINDS 65 KT WITH GUSTS TO 80 KT.
64 KT....... 35NE 30SE 0SW 30NW.
50 KT....... 60NE 45SE 30SW 50NW.
34 KT.......110NE 100SE 45SW 90NW.
12 FT SEAS..150NE 125SE 75SW 125NW.
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 30.9N 58.7W AT 30/1500Z
AT 30/1200Z CENTER WAS LOCATED NEAR 30.6N 58.3W

FORECAST VALID 01/0000Z 31.6N 59.6W
MAX WIND 70 KT...GUSTS 85 KT.
64 KT... 45NE 40SE 0SW 40NW.
50 KT... 60NE 45SE 30SW 50NW.
34 KT...110NE 100SE 45SW 90NW.

FORECAST VALID 01/1200Z 33.4N 60.5W
MAX WIND 75 KT...GUSTS 90 KT.
64 KT... 45NE 40SE 30SW 40NW.
50 KT... 60NE 45SE 40SW 50NW.
34 KT...120NE 100SE 60SW 90NW.

FORECAST VALID 02/0000Z 36.8N 60.5W
MAX WIND 70 KT...GUSTS 85 KT.
64 KT... 45NE 40SE 30SW 40NW.
50 KT... 60NE 45SE 40SW 50NW.
34 KT...120NE 100SE 60SW 90NW.

FORECAST VALID 02/1200Z 41.5N 59.0W...BECOMING EXTRATROPICAL
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 70NE 70SE 50SW 50NW.
34 KT...120NE 210SE 75SW 90NW.

FORECAST VALID 03/1200Z 50.0N 50.0W...EXTRATROPICAL
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 0NE 70SE 0SW 0NW.
34 KT...150NE 240SE 120SW 120NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 250 NM
ON DAY 4 AND 325 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY

OUTLOOK VALID 04/1200Z...ABSORBED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 30.9N 58.7W

NEXT ADVISORY AT 30/2100Z

$$
FORECASTER BLAKE/STEWART