Hurricane Bill

Forecast Advisory 20

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978
WTNT23 KNHC 200833
TCMAT3
HURRICANE BILL FORECAST/ADVISORY NUMBER 20
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL032009
0900 UTC THU AUG 20 2009

INTERESTS IN BERMUDA SHOULD MONITOR THE PROGRESS OF BILL. A
HURRICANE OR TROPICAL STORM WILL LIKELY BE REQUIRED FOR BERMUDA
LATER THIS MORNING.

HURRICANE CENTER LOCATED NEAR 21.6N 60.3W AT 20/0900Z
POSITION ACCURATE WITHIN 10 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 305 DEGREES AT 16 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 949 MB
EYE DIAMETER 25 NM
MAX SUSTAINED WINDS 110 KT WITH GUSTS TO 135 KT.
64 KT....... 75NE 45SE 30SW 45NW.
50 KT.......105NE 90SE 60SW 90NW.
34 KT.......200NE 175SE 100SW 175NW.
12 FT SEAS..400NE 330SE 240SW 300NW.
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 21.6N 60.3W AT 20/0900Z
AT 20/0600Z CENTER WAS LOCATED NEAR 21.1N 59.6W

FORECAST VALID 20/1800Z 23.0N 62.3W
MAX WIND 115 KT...GUSTS 140 KT.
64 KT... 75NE 45SE 30SW 45NW.
50 KT...105NE 90SE 60SW 90NW.
34 KT...200NE 175SE 100SW 175NW.

FORECAST VALID 21/0600Z 25.2N 64.7W
MAX WIND 120 KT...GUSTS 145 KT.
64 KT... 75NE 45SE 30SW 45NW.
50 KT...120NE 100SE 70SW 100NW.
34 KT...225NE 200SE 120SW 180NW.

FORECAST VALID 21/1800Z 27.8N 66.5W
MAX WIND 120 KT...GUSTS 145 KT.
64 KT... 75NE 45SE 30SW 45NW.
50 KT...120NE 100SE 70SW 100NW.
34 KT...225NE 200SE 120SW 180NW.

FORECAST VALID 22/0600Z 30.8N 68.1W
MAX WIND 120 KT...GUSTS 145 KT.
50 KT...120NE 100SE 70SW 100NW.
34 KT...225NE 200SE 120SW 180NW.

FORECAST VALID 23/0600Z 38.5N 68.0W
MAX WIND 105 KT...GUSTS 130 KT.
50 KT...120NE 120SE 70SW 100NW.
34 KT...225NE 225SE 120SW 180NW.

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 24/0600Z 46.6N 59.0W
MAX WIND 70 KT...GUSTS 85 KT.

OUTLOOK VALID 25/0600Z 53.5N 36.0W...EXTRATROPICAL
MAX WIND 55 KT...GUSTS 65 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.6N 60.3W

NEXT ADVISORY AT 20/1500Z

$$
FORECASTER BEVEN