000
FZNT02 KNHC 201624
HSFAT2

HIGH SEAS FORECAST
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
1630 UTC THU AUG 20 2009

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS
AMENDED FOR ATLC FORECAST

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE 
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE 
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

PAN PAN

ATLANTIC BETWEEN 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA
AND GULF OF MEXICO

SYNOPSIS VALID 1200 UTC THU AUG 20.
24 HOUR FORECAST VALID 1200 UTC FRI AUG 21.
48 HOUR FORECAST VALID 1200 UTC SAT AUG 22.

.WARNINGS.

...HURRICANE WARNING...
HURRICANE BILL NEAR 22.6N 61.7W 951 MB AT 1500 UTC AUG 20 MOVING 
NW OR 305 DEG AT 16 KT. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 
KT. TROPICAL STORM FORCE WINDS WITHIN 200 NM NW AND SE 
QUADRANTS...225 NM NE QUADRANT AND 100 NM SW QUADRANT.SEAS 12 
FT OR GREATER WITHIN 440 NM NE QUADRANT...320 NM SE 
QUADRANT...350 NM SW QUADRANT...AND 375 NM NW QUADRANT WITH SEAS 
TO 53 FT.
.24 HOUR FORECAST HURRICANE BILL NEAR 26.6N 66.0W. MAXIMUM
SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS
WITHIN 225 NM NE QUADRANT...200 NM SE QUADRANT...120 NM SW 
QUADRANT...AND 180 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
480 NM NE QUADRANT...380 NM SE QUADRANT...420 NM SW QUADRANT... 
AND 375 NM NW QUADRANT WITH SEAS TO 60 FT.
.48 HOUR FORECAST HURRICANE BILL NEAR 32.5N 69.0W. MAXIMUM 
SUSTAINED WINDS 110 KT GUSTS 135 KT. LITTLE CHANGE IN RADIUS OF 
TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER. 
.72 HOUR FORECAST HURRICANE BILL NEAR 40.5N 66.5W. MAXIMUM
SUSTAINED WINDS 100 KT GUSTS 120 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE BILL BECOMING EXTRATROPICAL NEAR
48.0N 53.0W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT.
.120 HOUR FORECAST EXTRATROPICAL LOW BILL NEAR 55.0N 28.0W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.

.SYNOPSIS AND FORECAST.

.ATLC...EXCEPT AS NOTED IN WARNINGS ON HURRICANE BILL WITHIN 500 
NM E SEMICIRCLE AND 360 NM W SEMICIRCLE...WINDS 20 TO 33 KT. 
SEAS 8 TO 20 FT. 
.24 HOUR FORECAST...EXCEPT AS NOTED IN WARNINGS WITHIN 480 NM E 
SEMICIRCLE...AND 225 NM SW AND 360 NM NW QUADRANTS...WINDS 20 TO 
33 KT. SEAS 8 TO 22 FT. ELSEWHERE N OF 18N BETWEEN 54W AND 
75W...WINDS LESS THAN 20 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST...EXCEPT AS NOTED IN WARNINGS WITHIN 420 NM SE 
QUADRANT AND 240 NM SW QUADRANT...WINDS 20 TO 33 KT. SEAS 12 TO 
20 FT. ELSEWHERE N OF 23.5N BETWEEN 57W AND 79W...WINDS LESS 
THAN 20 KT. SEAS 8 TO 12 FT.

.ATLC ELSEWHERE FROM 12N TO 24N E OF 51W...NE TO E WINDS 20 KT. 
SEAS TO 9 FT.
.24 HOUR FORECAST FROM 13N TO 24N E OF 56W...NE TO E WINDS 20 TO 
25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST FROM 15N TO 25N E OF 60W...NE TO E WINDS 20 
KT. SEAS 8 FT.

.CARIBBEAN FROM 11N TO 15N BETWEEN 72W AND 78W...NE TO E WINDS 
20 KT. SEAS 8 FT.
.24 HOUR FORECAST FROM 11N TO 13N BETWEEN 73W AND 76W...NE TO E 
WINDS TO 20 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 11N TO 13N BETWEEN 68W AND 74W...NE TO E 
WINDS TO 20 KT. SEAS LESS THAN 8 FT.

.REMAINDER OF AREA WINDS LESS THAN 20 KT. SEAS LESS THAN 8 FT.

$$
.FORECASTER STRIPLING. TROPICAL PREDICTION CENTER.