000
FZNT02 KNHC 182142
HSFAT2

HIGH SEAS FORECAST
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
2230 UTC TUE AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC TUE AUG 18.
24 HOUR FORECAST VALID 1800 UTC WED AUG 19.
48 HOUR FORECAST VALID 1800 UTC THU AUG 20.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE BILL NEAR 16.6N 52.2W 962 MB AT 2100 UTC AUG 18
MOVING WNW OR 290 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 95 KT
GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM OF CENTER 
EXCEPT 100 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 300 NM 
NE QUADRANT...225 NM SE QUADRANT...150 NM SW QUADRANT...AND 250 
NM NW QUADRANT WITH SEAS TO 38 FT.
.24 HOUR FORECAST HURRICANE BILL NEAR 18.9N 56.9W. MAXIMUM
SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS
WITHIN 160 NM OF CENTER EXCEPT 100 NM SW QUADRANT. SEAS 12 FT OR 
GREATER WITHIN 320 NM N SEMICIRCLE AND 180 NM S SEMICIRCLE WITH 
SEAS TO 42 FT.
.48 HOUR FORECAST HURRICANE BILL NEAR 22.6N 61.8W. MAXIMUM
SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS
WITHIN 160 NM NW AND SE QUADRANTS...180 NM NE QUADRANT AND 105 
NM SW QUADRANT. SEAS 12 FT OR GREATER 400 NM NE 
QUADRANT...300 NM NW QUADRANT AND 180 NM S SEMICIRCLE WITH SEAS 
TO 45 FT.
.72 HOUR FORECAST HURRICANE BILL NEAR 27.3N 65.8W. MAXIMUM
SUSTAINED WINDS 110 KT GUSTS 135 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE BILL NEAR 33.5N 68.0W. MAXIMUM
SUSTAINED WINDS 100 KT GUSTS 120 KT.
.120 HOUR FORECAST HURRICANE BILL NEAR 40.5N 65.5W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT.

.SYNOPSIS AND FORECAST.

.ATLC...EXCEPT AS NOTED IN WARNINGS WITHIN 480 NM N 
SEMICIRCLE...360 NM SE AND 150 NM SW QUADRANTS WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT. ELSEWHERE FROM 09N TO 23N BETWEEN 45W AND 
62W WINDS TO 20 KT. SEAS 8 TO 10 FT IN PRIMARILY E SWELL.
.24 HOUR FORECAST...EXCEPT AS NOTED IN WARNING WITHIN 480 N 
SEMICIRCLE...360 NM SE AND 150 NM SW QUADRANTS WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT. ELSEWHERE FROM 15N TO 24N E OF 57W E TO SE 
WINDS TO 20 KT. SEAS TO 9 FT. ELSEWHERE FROM 10N TO 18N W OF 55W 
WINDS LESS THAN 20 KT. SEAS 8 TO 10 FT IN NE SWELL.
.48 HOUR FORECAST...EXCEPT AS NOTED IN WARNING WITHIN 480 N 
SEMICIRCLE...360 NM SE AND 180 NM SW QUADRANTS WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT. ELSEWHERE FROM 17N TO 30N BETWEEN 52W AND 
70W AND E OF 52W FROM 14N TO 25N E TO SE WINDS TO 20 KT...EXCEPT 
NE W OF 62W. SEAS TO 9 FT IN PRIMARILY E SWELL.

.ATLC S OF 25N W OF 70W E TO SE WINDS 20 TO 25 KT. SEAS 8 TO 10 
FT.
.12 HOUR FORECAST S OF 22N W OF 70W E WINDS TO 20 KT. SEAS TO 8 
FT. W OF 78W FROM 24N TO 25N SE WINDS TO 20 KT. SEAS LESS THAN 8 
FT.
.24 HOUR FORECAST WINDS LESS THAN 20 KT. SEAS LESS THAN 8 FT.

.CARIBBEAN FROM 11N TO 15N BETWEEN 70W AND 78W NE TO E WINDS 20 
TO 25 KT. SEAS TO 9 FT. FROM 11N TO 18N E OF 80W NE TO E WINDS 
TO 20 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST FROM 11N TO 15N BETWEEN 72W AND 80W NE TO E 
WINDS 20 TO 25 KT. SEAS 8 TO 12 FT. ELSEWHERE FROM 11N TO 17N W 
OF 70W NE TO E WINDS TO 20 KT. SEAS TO 8 FT.
.48 HOUR FORECAST FROM 11N TO 14N BETWEEN 73W AND 80W NE TO E 
WINDS TO 20 KT. SEAS TO 9 FT. 

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

$$
.FORECASTER SCHAUER CLARK. TROPICAL PREDICTION CENTER.