Hurricane Isaac

Forecast Advisory 13

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939
WTNT24 KNHC 302032
TCMAT4
HURRICANE ISAAC FORECAST/ADVISORY NUMBER 13
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL092006
2100 UTC SAT SEP 30 2006

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

HURRICANE CENTER LOCATED NEAR 31.6N 59.5W AT 30/2100Z
POSITION ACCURATE WITHIN 15 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 310 DEGREES AT 9 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 989 MB
EYE DIAMETER 20 NM
MAX SUSTAINED WINDS 70 KT WITH GUSTS TO 85 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 31.6N 59.5W AT 30/2100Z
AT 30/1800Z CENTER WAS LOCATED NEAR 31.3N 59.2W

FORECAST VALID 01/0600Z 32.6N 60.3W
MAX WIND 75 KT...GUSTS 90 KT.
64 KT... 35NE 30SE 0SW 30NW.
50 KT... 60NE 45SE 30SW 50NW.
34 KT...110NE 100SE 45SW 90NW.

FORECAST VALID 01/1800Z 35.0N 60.8W
MAX WIND 75 KT...GUSTS 90 KT.
64 KT... 40NE 40SE 25SW 30NW.
50 KT... 65NE 50SE 35SW 45NW.
34 KT...130NE 120SE 60SW 90NW.

FORECAST VALID 02/0600Z 39.0N 60.0W...BECOMING EXTRATROPICAL
MAX WIND 70 KT...GUSTS 85 KT.
64 KT... 40NE 40SE 0SW 25NW.
50 KT... 65NE 75SE 45SW 45NW.
34 KT...130NE 150SE 60SW 90NW.

FORECAST VALID 02/1800Z 44.0N 56.8W...EXTRATROPICAL
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 65NE 75SE 50SW 50NW.
34 KT...150NE 270SE 60SW 120NW.

FORECAST VALID 03/1800Z 52.0N 46.0W...EXTRATROPICAL
MAX WIND 45 KT...GUSTS 55 KT.
34 KT...320NE 240SE 150SW 200NW.

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 04/1800Z...ABSORBED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 31.6N 59.5W

NEXT ADVISORY AT 01/0300Z

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FORECASTER BLAKE/STEWART