000
FZNT02 KNHC 211638 AAA
HSFAT2

HIGH SEAS FORECAST
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
1630 UTC FRI AUG 21 2009

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS
AMENDED FOR ATLC FORECAST

UPDATE TO ADD GULF OF MEXICO SECTION

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 FRI AUG 21.
24 HOUR FORECAST VALID 1200 UTC SAT AUG 22.
48 HOUR FORECAST VALID 1200 UTC SUN AUG 23.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE BILL NEAR 27.6N 66.3W 958 MB AT 1500 UTC AUG 21 
MOVING NW OR 325 DEG AT 16 KT. MAXIMUM SUSTAINED WINDS 100 KT 
GUSTS 120 KT. TROPICAL STORM FORCE WINDS WITHIN 200 NM NW AND SE 
QUADRANTS...250 NM NE QUADRANT AND 120 NM SW QUADRANT.SEAS 12 
FT OR GREATER WITHIN 475 NM NE QUADRANT...360 NM SE QUADRANT... 
350 NM SW QUADRANT...AND 300 NM NW QUADRANT WITH SEAS TO 49 FT.
.24 HOUR FORECAST HURRICANE BILL NEAR 33.0N 68.5W. MAXIMUM
SUSTAINED WINDS 100 KT GUSTS 120 KT. LITTLE CHANGE IN RADIUS OF 
TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER...WITH SEAS 
TO 49 FT. 
.48 HOUR FORECAST HURRICANE BILL NEAR 41.0N 66.0W. MAXIMUM
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS 
WITHIN 250 NM NE QUADRANT...250 SE QUADRANT...150 NM SW QUADRANT 
AND 180 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 320 NM NW 
QUADRANT...500 NM SE QUADRANT...420 NM SW QUADRANT AND 225 NM NW 
QUADRANT WITH SEAS TO 46 FT.
.72 HOUR FORECAST TROPICAL STORM BILL NEAR 48.5N 52.0W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST EXTRATROPICAL LOW BILL NEAR 53.5N 27.5W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST EXTRATROPICAL LOW BILL NEAR 57.5N 10.0W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.

.SYNOPSIS AND FORECAST.

.ATLC EXCEPT AS NOTED IN WARNINGS ON HURRICANE BILL...WITHIN 540 
NM NE AND 480 NM SE QUADRANTS AND 420 NM W SEMICIRCLE...WIND 20 
TO 33 KT. SEAS 8 TO 12 FT. ELSEWHERE N OF 18.5N BETWEEN 54W AND  
75W...WINDS TO 20 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS...OVER FORECAST 
WATERS WITHIN 480 NM SE QUADRANTS AND 250 NM SW QUADRANT...WINDS 
20 TO 33 KT. SEAS TO 11 TO 18 FT. ELSEWHERE N OF 23N BETWEEN 57W 
TO 80W...WIND LESS THAN 20 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST N OF 27.5N BETWEEN 60W AND 70W...WINDS LESS 
THAN 20 KT. SEAS 8 TO 11 FT. ELSEWHERE N OF 28N W OF 76W...SW 
WINDS 20 KT. SEAS 8 FT.

.ATLC ELSEWHERE FROM 12N TO 25N E OF 57W...NE TO E WIND 20 TO 25 
KT. SEAS 8 TO 9 FT.
.24 HOUR FORECAST S OF 22N W OF 55W...NE TO E WIND 20 TO 25 KT. 
SEAS 8 TO 10 FT.
.48 HOUR FORECAST FROM 12N TO 24N BETWEEN 48W AND 55W...E WIND 
20 TO 25 KT. SEAS 9 FT.

.CARIBBEAN FROM 10.5N TO 13N BETWEEN 71W AND 77W... NE TO E WIND 
20 KT.  SEAS LESS THAN 8 FT.
.24 HOUR FORECAST  FROM 11N TO 15N E OF 77W  NE TO E WIND 20 KT 
...EXCEPT TO 25 KT NEAR COAST OF COLOMBIA.  SEAS TO 9 FT.
.48 HOUR FORECAST  LITTLE CHANGE.


.GULF OF MEXICO S OF 23N W OF 92W...SE WINDS 20 KT. SEAS LESS 
THAN 8 FT. 
.24 HOUR FORECAST WINDS LESS THAN 20 KT. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER STRIPLING. TROPICAL PREDICTION CENTER.