000
FZNT02 KNHC 181555
HSFAT2

HIGH SEAS FORECAST
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
1630 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC TUE AUG 18.
24 HOUR FORECAST VALID 1200 UTC WED AUG 19.
48 HOUR FORECAST VALID 1200 UTC THU AUG 20.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE BILL NEAR 15.9N 51.2W 963 MB AT 1500 UTC AUG 18 
MOVING WNW OR 285 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 90 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 36 FT.
.24 HOUR FORECAST HURRICANE BILL NEAR 18.0N 55.3W. MAXIMUM
SUSTAINED WINDS 105 KT GUSTS 130 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 38 FT.
.48 HOUR FORECAST HURRICANE BILL NEAR 21.5N 60.3W. MAXIMUM
SUSTAINED WINDS 110 KT GUSTS 135 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 WITHIN 400 NM NE 
QUADRANT...300 NM NW QUADRANT AND 180 NM S SEMICIRCLE WITH SEAS 
TO 42 FT.
.72 HOUR FORECAST HURRICANE BILL NEAR 25.9N 64.7W. MAXIMUM
SUSTAINED WINDS 110 KT GUSTS 135 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE BILL NEAR 31.5N 67.5W. MAXIMUM
SUSTAINED WINDS 105 KT GUSTS 130 KT.
.120 HOUR FORECAST HURRICANE BILL NEAR 38.0N 66.5W. MAXIMUM
SUSTAINED WINDS 95 KT GUSTS 115 KT.

.SYNOPSIS AND FORECAST.

.ATLC...EXCEPT AS NOTED IN WARNINGS WITHIN 480 NM N AND 300 NM S 
SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. ELSEWHERE FROM 
10N TO 23N BETWEEN 40W AND 61W WINDS TO 20 KT. SEAS 8 TO 10 FT 
IN NE TO E SWELL. 
.24 HOUR FORECAST...EXCEPT AS NOTED IN WARNING WITHIN 480 N AND 
240 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
ELSEWHERE FROM 10N TO 25N BETWEEN 48W AND 62W WINDS TO 20 KT. 
SEAS 8 TO 10 FT IN E AND SE SWELL.
.48 HOUR FORECAST...EXCEPT AS NOTED IN WARNING WITHIN 420 N AND 
300 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
ELSEWHERE FROM 12N TO 25N E OF 53W E TO SE WINDS 20 KT. 8 TO 10 
FT IN NE AND E SWELL.

. ATLC S OF 25N BETWEEN 65W AND 82W E WINDS 20 TO 25 KT. SEAS TO 
9 FT.
.12 HOUR FORECAST S OF 24N BETWEEN 68W AND 74W E WINDS TO 20 KT. 
SEAS TO 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 TO 
20 KT. SEAS TO 8 FT.
.24 HOUR FORECAST FROM 11N TO 16N BETWEEN 72W AND 80 NE TO E 
WINDS 20 TO 25 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST FROM 11N TO 15N BETWEEN 72W AND 82W NE TO E 
WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. 

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

$$
.FORECASTER GR. TROPICAL PREDICTION CENTER.