FZNT01 KWBC 312156
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC THU AUG 31 2023

CCODE/2:31:04:11:00/AOE+AOW/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 

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. 

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE 
NATIONAL WEATHER SERVICE. EMAIL US AT 
VOSOPS@NOAA.GOV(LOWERCASE).

FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH 
ATLANTIC ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.PHP 
(ALL LOWERCASE).

SECURITE

NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1800 UTC AUG 31. 
24 HOUR FORECAST VALID 1800 UTC SEP 01.
48 HOUR FORECAST VALID 1800 UTC SEP 02.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE FRANKLIN NEAR 36.0N 60.1W 970 MB AT 2100 UTC AUG 31
MOVING ENE OR 065 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 80 KT
GUSTS 100 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE
QUADRANT...140 NM SE QUADRANT...140 NM SW QUADRANT...AND 80 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 360 NM NE...210 NM
SE...220 NM SW...AND 310 NM NW QUADRANTS WITH SEAS TO 39 FT.
ELSEWHERE FROM 31N TO 38N BETWEEN 54W AND 65W WINDS 20 TO 33 KT.
SEAS TO 12 FT.
.24 HOUR FORECAST HURRICANE FRANKLIN NEAR 38.9N 53.8W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS
WITHIN 150 NM NE QUADRANT...160 NM SE QUADRANT...150 NM SW
QUADRANT...AND 180 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
240 NM OF CENTER...EXCEPT 300 NM NE QUADRANT WITH SEAS TO 36 FT.
ELSEWHERE FROM 34N TO 45N BETWEEN 51W AND 65W WINDS 20 TO 33 KT.
SEAS TO 12 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 43.2N
45.3W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM
FORCE WINDS WITHIN 200 NM NE QUADRANT...200 NM SE QUADRANT...170
NM SW QUADRANT...AND 200 NM NW QUADRANT. SEAS 12 FT OR GREATER
WITHIN 300 NM OF CENTER...EXCEPT 420 NM SW QUADRANT WITH SEAS TO
32 FT. ELSEWHERE FROM 36N TO 49N
BETWEEN 36W AND 55W WINDS 20 TO 33 KT. SEAS TO 12 FT.
.72 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 46.6N
37.6W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 49.5N
31.0W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR
52.5N 27.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

...TROPICAL STORM WARNING...
.POST-TROPICAL CYCLONE IDALIA NEAR 33.5N 73.5W 994 MB AT 2100 UTC
AUG 31 MOVING E OR 090 DEG AT 18 KT. MAXIMUM SUSTAINED WINDS 55
KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 200 NM NM
NE...180 NM SE...160 NM SW...AND 180 NM NW QUADRANTS. 
SEAS 12 FT OR GREATER WITHIN 240 NM NE QUADRANT...220 NM SE
QUADRANT...160 NM SW QUADRANT...AND 120 NM NW QUADRANT WITH SEAS
TO 24 FT. ELSEWHERE FROM 31N TO 40N W OF 68W WINDS 20 TO 33 KT.
SEAS TO 12 FT. 
.24 HOUR FORECAST POST-TROPICAL CYCLONE IDALIA NEAR 31.8N 68.3W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 180 NM NE...120 NM SW...AND 150 NM NW QUADRANTS.
SEAS 12 FT OR GREATER WITHIN 240 NM NE...240 NM SE...300 NM
SW...AND 330 NM NW QUADRANTS WITH SEAS TO 22 FT. ELSEWHERE FROM
31N TO 41N BETWEEN 62W AND 76W WINDS 20 TO 33 KT. SEAS TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM IDALIA NEAR 30.9N 65.9W. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS
WITHIN 130 NM NE QUADRANT AND 100 NM NW QUADRANT. SEAS 12 FT OR
GREATER WITHIN 300 NM N SEMICIRCLE WITH SEAS TO 17 FT. ELSEWHERE
FROM 31N TO 37N BETWEEN 61W AND 74W WINDS 20 TO 33 KT. SEAS TO 12
FT.  
.72 HOUR FORECAST TROPICAL STORM IDALIA NEAR 32.1N 63.4W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM IDALIA NEAR 35.1N 60.5W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST POST-TROPICAL CYCLONE IDALIA NEAR 38.0N 59.9W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.

...TROPICAL STORM WARNING...
.TROPICAL STORM JOSE NEAR 30.8N 52.2W 1009 MB AT 2100 UTC AUG 31
MOVING N OR 360 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 35 KT GUSTS
45 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM E SEMICIRCLE. SEAS
TO 12 FT. ELSEWHERE WITHIN 120 NM NE QUADRANT WINDS 20 TO 33 KT.
SEAS TO 11 FT. 
.24 HOUR FORECAST TROPICAL STORM JOSE NEAR 37.2N 51.0W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS
WITHIN 40 NM E SEMICIRCLE. SEAS 12 FT OR
GREATER WITHIN 90 NM E SEMICIRCLE WITH SEAS TO 14 FT. ELSEWHERE
FROM 34N TO 40N BETWEEN 46W AND 52W WINDS 20 TO 33 KT. SEAS TO 12
FT. 
.36 HOUR FORECAST...DISSIPATED.

...STORM WARNING...
.LOW 54N52W 976 MB MOVING NE 25 KT. WITHIN 300 NM NW
SEMICIRCLE...540 NM E QUADRANT...AND 660 NM SE QUADRANT WINDS 30
TO 45 KT. SEAS 10 TO 18 FT. ELSEWHERE FROM 46N TO 58N W OF 36W
AND WITHIN 300 NM E OF A LINE FROM 46N55W TO 39N61W WINDS 20 TO
30 KT. SEAS TO 12 FT. 
.12 HOUR FORECAST LOW 56N46W 962 MB. WITHIN 240 NM W AND SW
SEMICIRCLES WINDS 40 TO 55 KT. SEAS 18 TO 30 FT. 
.24 HOUR FORECAST LOW 61N38W 960 MB. WITHIN 420 NM S AND SE...480
NM W...AND 480 NM N QUADRANTS WINDS 35 TO 50 KT. SEAS 20 TO 34
FT. ELSEWHERE N OF 47N E OF 59W WINDS 25 TO 35 KT. SEAS 11 TO 22
FT. 
.48 HOUR FORECAST LOW JUST E OF THE AREA NEAR 65N33W 966 MB.
FROM 58N TO 61N E OF 47W WINDS 40 TO 55 KT. SEAS 18 TO 32 FT.
ELSEWHERE FROM 53N TO 63N E OF 52W WINDS 25 TO 40 KT. SEAS 12 TO
20 FT.

.SYNOPSIS AND FORECAST.

.LOW 61N39W 1002 MB DRIFTING N. N OF 60N E OF GREENLAND WINDS TO
25 KT. SEAS TO 8 FT. 
.24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 61N38W.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 360 NM E OF A
LINE FROM 56N50W TO 44N59W.
.24 HOUR FORECAST DENSE FOG N OF 60N E OF GREENLAND. 
.48 HOUR FORECAST CONDITIONS IMPROVED.

.FORECASTER ACHORN. OCEAN PREDICTION CENTER.

NWS NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 1800 UTC THU AUG 31.
24 HOUR FORECAST VALID 1800 UTC FRI SEP 01.
48 HOUR FORECAST VALID 1800 UTC SAT SEP 02.

.WARNINGS.

...ATLC TROPICAL STORM WARNING...
.TROPICAL STORM JOSE NEAR 30.8N 52.2W 1009 MB AT 2100 UTC AUG 31 
MOVING N OR 360 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 35 KT 
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM E 
SEMICIRCLE AND 0 NM W SEMICIRCLE. WITHIN 120 NM NE AND 90 NM SE 
QUADRANTS WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. 
.24 HOUR FORECAST TROPICAL STORM JOSE WELL N OF AREA NEAR 37.2N 
51.0W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. OVER FORECAST 
WATERS WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST...DISSIPATED.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

...ATLC GALE WARNING...
...TROPICAL STORM WARNING...
.POST-TROPICAL CYCLONE IDALIA N OF AREA NEAR 33.5N 73.5W 994 MB 
AT 2100 UTC AUG 31 MOVING E OR 090 DEG AT 18 KT. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 KT. OVER FORECAST WATERS N OF 29N 
BETWEEN 73.5W AND 78W SW TO W WINDS 25 TO 35 KT. SEAS 10 TO 16 
FT IN MIXED SWELL. ELSEWHERE N OF 27N BETWEEN 70W AND 78W SW TO 
W WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.12 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 33.0N 
70.8W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.24 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA N OF AREA 
NEAR 31.8N 68.3W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. N 
OF 28N BETWEEN 68W AND 74W NW TO N WINDS 25 TO 35 KT. SEAS 12 TO 
18 FT. N OF 29N BETWEEN 65W AND 68W SW WINDS 25 TO 30 KT. SEAS 
10 TO 14 FT. REMAINDER OF THE AREA N OF 27N BETWEEN 63W AND 66W 
SW WINDS 20 TO 25 KT E OF 68W...AND NW TO N WINDS W OF 68W. SEAS 
8 TO 12 FT. ELSEWHERE N OF 27N AND E OF A LINE FROM 31N80W TO 
27N77W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT PRIMARILY IN NE 
SWELL. 
.48 HOUR FORECAST TROPICAL STORM IDALIA NEAR 30.9N 65.9W. 
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE 
WINDS WITHIN 0 NM S SEMICIRCLE...130 NM NE QUADRANT AND 100 NM 
NW QUADRANT. OVER FORECAST WATERS N OF 27N BETWEEN 66W AND 75W N 
WINDS 20 TO 30 KT. SEAS 12 TO 16 FT. N OF 26N BETWEEN 62W AND 
66W S TO SW WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. ELSEWHERE N OF A 
LINE FROM 31N60W TO 24N65W TO 23N73W TO 27N77W TO 31N80W WINDS 
20 KT OR LESS. SEAS 8 TO 11 FT IN NORTHERLY SWELL. 
.72 HOUR FORECAST TROPICAL STORM IDALIA NEAR 32.1N 63.4W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM IDALIA NEAR 35.1N 60.5W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST EXTRATROPICAL LOW IDALIA POST-TROP/EXTRATROP 
NEAR 38.0N 59.9W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

.SYNOPSIS AND FORECAST.

.ATLC HURRICANE FRANKLIN WELL N OF AREA. ELSEWHERE N OF 29N 
BETWEEN 50W AND 65W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT 
PRIMARILY IN NW SWELL. 
.24 HOUR FORECAST N OF 27N BETWEEN 50W AND 55W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT PRIMARILY IN NW SWELL.
.48 HOUR FORECAST N OF 28N BETWEEN 52W AND 60W W TO NW WINDS 20 
TO 25 KT. SEAS 8 TO 12 FT PRIMARY IN NW SWELL. ELSEWHERE N OF 
28N BETWEEN 50W AND 60W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN 
NW SWELL.  

CARIBBEAN FROM 11N TO 15N BETWEEN 70W AND 77W...INCLUDING THE 
GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT. 
.12 HOUR FORECAST FROM 11N TO 16N BETWEEN 69W AND 78W... 
INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. 
SEAS 8 FT W OF 72W.
.24 HOUR FORECAST FROM 11N TO 15N BETWEEN TOW AND 75W... 
INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. 
SEAS LESS THAN 8 FT.
.36 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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


.FORECASTER GR. NATIONAL HURRICANE CENTER.

$$