Hurricane Helene

Forecast Advisory 37

---

791
WTNT23 KNHC 211446
TCMAT3
HURRICANE HELENE FORECAST/ADVISORY NUMBER 37
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL082006
1500 UTC THU SEP 21 2006

HURRICANE CENTER LOCATED NEAR 29.6N 56.9W AT 21/1500Z
POSITION ACCURATE WITHIN 25 NM

PRESENT MOVEMENT TOWARD THE NORTH OR 5 DEGREES AT 11 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 970 MB
MAX SUSTAINED WINDS 70 KT WITH GUSTS TO 85 KT.
64 KT....... 30NE 30SE 25SW 25NW.
50 KT....... 70NE 70SE 60SW 60NW.
34 KT.......175NE 175SE 175SW 175NW.
12 FT SEAS..400NE 300SE 300SW 350NW.
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 29.6N 56.9W AT 21/1500Z
AT 21/1200Z CENTER WAS LOCATED NEAR 29.0N 57.0W

FORECAST VALID 22/0000Z 31.4N 56.3W
MAX WIND 70 KT...GUSTS 85 KT.
64 KT... 30NE 30SE 25SW 25NW.
50 KT... 70NE 70SE 60SW 60NW.
34 KT...175NE 175SE 175SW 175NW.

FORECAST VALID 22/1200Z 34.1N 54.5W
MAX WIND 70 KT...GUSTS 85 KT.
64 KT... 30NE 30SE 25SW 25NW.
50 KT... 70NE 70SE 60SW 60NW.
34 KT...175NE 175SE 175SW 175NW.

FORECAST VALID 23/0000Z 36.8N 51.2W
MAX WIND 70 KT...GUSTS 85 KT.
64 KT... 30NE 30SE 20SW 20NW.
50 KT... 80NE 80SE 60SW 60NW.
34 KT...200NE 200SE 175SW 175NW.

FORECAST VALID 23/1200Z 39.6N 46.6W...BECOMING EXTRATROPICAL
MAX WIND 65 KT...GUSTS 80 KT.
50 KT...100NE 100SE 100SW 100NW.
34 KT...225NE 225SE 200SW 200NW.

FORECAST VALID 24/1200Z 45.2N 36.4W...EXTRATROPICAL
MAX WIND 60 KT...GUSTS 75 KT.
50 KT...120NE 150SE 150SW 120NW.
34 KT...240NE 300SE 300SW 240NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 225 NM
ON DAY 4 AND 300 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY

OUTLOOK VALID 25/1200Z 49.5N 28.5W...EXTRATROPICAL
MAX WIND 60 KT...GUSTS 75 KT.

OUTLOOK VALID 26/1200Z 54.0N 20.0W...EXTRATROPICAL
MAX WIND 55 KT...GUSTS 65 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 29.6N 56.9W

NEXT ADVISORY AT 21/2100Z

$$
FORECASTER BROWN/AVILA