FZNT01 KWBC 020418
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
0430 UTC SAT SEP 02 2023 

CCODE/2:31:04:01:00/AOE/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 0000 UTC SEP 02. 
24 HOUR FORECAST VALID 0000 UTC SEP 03. 
48 HOUR FORECAST VALID 0000 UTC SEP 04. 

.WARNINGS. 

...HURRICANE FORCE WIND WARNING...
.POST-TROPICAL CYCLONE FRANKLIN NEAR 40N52W 982 MB MOVING NE 20 
KT. WITHIN 120 NM OF CENTER WINDS 50 TO 70 KT. SEAS 20 TO 32 FT. 
ELSEWHERE WITHIN 300 NM OF LOW EXCEPT WITHIN 240 NM S QUADRANT 
WINDS 35 TO 50 KT. SEAS 16 TO 27 FT. ALSO WITHIN 360 NM E AND 
480 NM W SEMICIRCLES WINDS 25 TO 35 KT. SEAS 10 TO 18 FT. 
.24 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 44N43W 979 
MB. WITHIN 120 NM OF CENTER EXCEPT NE QUADRANT WINDS 50 TO 70 
KT. SEAS 22 TO 36 FT. ELSEWHERE WITHIN 300 NM NE AND 180 NM SW 
SEMICIRCLES WINDS 35 TO 50 KT. SEAS 17 TO 25 FT. ALSO FROM 37N 
TO 50N E OF 48W WINDS 25 TO 35 KT. SEAS 8 TO 18 FT. 
.48 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN E OF AREA NEAR 
48N33W 987 MB. WITHIN 240 NM W QUADRANT WINDS 30 TO 45 KT. SEAS 
18 TO 28 FT. ELSEWHERE WITHIN 360 NM W SEMICIRCLE WINDS 20 TO 30 
KT. SEAS 10 TO 19 FT. 

...STORM WARNING...
.POST-TROPICAL CYCLONE IDALIA NEAR 31.8N 65.3W 1000 MB AT 0300
UTC SEP 02 MOVING E OR 100 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS
45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 180 NM NE
AND SW QUADRANTS...190 NM NW QUADRANT AND 150 NM SE QUADRANT. 
SEAS 12 FT OR GREATER WITHIN 300 NM NE QUADRANT...240 NM SE
QUADRANT...360 NM SW QUADRANT...AND 420 NM NW QUADRANT WITH SEAS
TO 20 FT. ELSEWHERE EXCEPT WHERE NOTED ABOVE WITH POST-TROPICAL 
FRANKLIN WITHIN 540 NM N SEMICIRCLE...AND 300 NM SE AND 420 NM 
SW QUADRANTS WINDS 20 TO 33 KT. SEAS 8 TO 15 FT. 
.24 HOUR FORECAST TROPICAL STORM IDALIA NEAR 31.8N 62.9W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 180 NM N SEMICIRCLE...80 NM SE QUADRANT AND 120 NM
SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 600 NM NE AND 420 NM 
NW QUADRANTS WITH SEAS TO 24 FT. ELSEWHERE FROM 31N TO 38N 
BETWEEN 59W AND 73W...AND FROM 34N TO 40N BETWEEN 59W AND 52W 
WINDS 20 TO 33 KT. SEAS 8 TO 14 FT. 
.48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 34.5N
59.5W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. LITTLE CHANGE
IN RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR
GREATER WITHIN 240 NM E SEMICIRCLE...AND 420 NM SW AND 300 NM NW 
QUADRANTS WITH SEAS TO 20 FT. ELSEWHERE FROM 31N TO 38N BETWEEN 
57W AND 69W...AND FROM 35N TO 39N BETWEEN 57W AND 48W WINDS 20 
TO 33 KT. SEAS 8 TO 14 FT.  
.72 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 38.8N
58.0W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 41.1N
58.8W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 42.6N
58.9W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

...TROPICAL STORM WARNING... 
.48 HOUR FORECAST TROPICAL STORM GERT NEAR 32.0N 52.4W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS
WITHIN 40 NM E SEMICIRCLE AND 0 NM W SEMICIRCLE. SEAS 12 FT OR
GREATER WITHIN 60 NM NE AND 120 NM SE QUADRANTS WITH SEAS TO 14 
FT. ELSEWHERE FROM 31N TO 33N BETWEEN 54W AND 48W WINDS 20 TO 33 
KT. SEAS TO 12 FT. `
.60 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. 

...STORM WARNING... 
.LOW 62N37W 958 MB MOVING NE 10 KT. BETWEEN 120 NM AND 360 NM SW 
QUADRANT WINDS 40 TO 55 KT. SEAS 19 TO 34 FT. ELSEWHERE WITHIN 
780 NM S AND SW...AND 660 NM W QUADRANTS WINDS 25 TO 40 KT. SEAS 
10 TO 22 FT. 
.24 HOUR FORECAST LOW JUST E OF AREA 64N32W 965 MB. WITHIN 150 
NM S OF A LINE FROM 61N35W TO 60N44W TO 61N47W WINDS 45 TO 55 
KT. SEAS 19 TO 37 FT. ELSEWHERE FROM 57N TO 61N E OF 49W AND 
WITHIN 90 NM W AND NW QUADRANTS WINDS 30 TO 45 KT. SEAS 10 TO 20 
FT. ALSO E OF A LINE FROM 63N51W TO 59N51W TO 54N42W WINDS 25 TO 
35 KT. SEAS 8 TO 15 FT. 
.48 HOUR FORECAST LOW E OF THE AREA 64N32W 980 MB. WITHIN 480 NM 
SW AND 240 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 18 FT.

...GALE WARNING...
.REMNANTS OF JOSE NEAR 42.1N 47.4W 999 MB AT 0300 UTC SEP 02
MOVING NE OR 035 DEG AT 20 KT. MAXIMUM SUSTAINED WINDS 40 KT
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM E
SEMICIRCLE AND 0 NM W SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN
60 NM NE QUADRANT...180 NM SE QUADRANT...420 NM SW
QUADRANT...AND 270 NM NW QUADRANT WITH SEAS TO 35 FT. ELSEWHERE 
EXCEPT WHERE NOTED ABOVE WITH POST-TROPICAL CYCLONE FRANKLIN 
FROM 34N TO 42N BETWEEN 44W AND 51W WINDS 20 TO 33 KT. SEAS 8 TO 
13 FT.
.12 HOUR FORECAST...DISSIPATED.

...GALE WARNING... 
.48 HOUR FORECAST FROM 59N TO 65N W OF 55W AREA OF SE WINDS 25 
TO 35 KT. SEAS TO 12 FT. 

.SYNOPSIS AND FORECAST. 

.48 HOUR FORECAST W OF A LINE FROM 48N52W TO 53N52W INCLUDING 
THE GULF OF SAINT LAWRENCE AREA OF SW WINDS TO 25 KT. SEAS LESS 
THAN 8 FT. 

.DENSE FOG. 48 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM W 
OF A LINE FROM 64N64W TO 58N57W. 

.FORECASTER MUSONDA. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 0000 UTC SAT SEP 2.
24 HOUR FORECAST VALID 0000 UTC SUN SEP  3.
48 HOUR FORECAST VALID 0000 UTC MON SEP  4.

.WARNINGS.

...ATLC GALE WARNING...
...ATLC TROPICAL STORM WARNING...
.POST-TROPICAL CYCLONE IDALIA NEAR 31.8N 65.3W 1000 MB AT 0300 
UTC SEP 02 MOVING E OR 100 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 
45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 180 NM NE 
AND SW QUADRANTS...190 NM NW QUADRANT AND 150 NM SE QUADRANT. 
WITHIN 31N63W TO 31N69W TO 30N69W TO 30N67W TO 30N66W TO 30N64W 
TO 31N63W W WINDS 30 TO 40 KT. SEAS 12 TO 19 FT. ELSEWHERE WITHIN
30N62W TO 30N67W TO 31N69W TO 31N73W TO 28N70W TO 28N66W TO 
30N62W NW WINDS 20 TO 30 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA 
WITHIN 31N60W TO 28N70W TO 31N74W TO 31N78W TO 26N77W TO 25N66W 
TO 31N60W...INCLUDING ATLANTIC EXPOSURES...WINDS 20 KT OR LESS. 
SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM IDALIA NEAR 31.8N 62.9W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 180 NM N SEMICIRCLE...80 NM SE QUADRANT AND 120 NM 
SW QUADRANT. SOUTH OF 31N...SEAS 12 FT OR GREATER WITHIN 280 NM 
SW QUADRANT AND 150 NM SE QUADRANT WITH SEAS TO 16 FT. ELSEWHERE 
WITHIN 31N59W TO 31N70W TO 30N68W TO 28N62W TO 28N61W TO 31N59W 
WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 
31N55W TO 29N66W TO 31N70W TO 31N80W TO 23N73W TO 22N64W TO 
31N55W...INCLUDING ATLANTIC EXPOSURES...WINDS 20 KT OR LESS. SEAS
8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 34.5N 
59.5W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. LITTLE CHANGE. 
IN RADIUS OF TROPICAL STORM FORCE WINDS. WITHIN 31N53W TO 31N75W 
TO 26N76W TO 21N69W TO 25N55W TO 31N53W...INCLUDING ATLANTIC 
EXPOSURES... WINDS 20 KT OR LESS. SEAS 8 TO 13 FT IN N TO NE 
SWELL...HIGHEST NEAR 31N64W. 
.72 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 38.8N 
58.0W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 41.1N 
58.8W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 42.6N
58.9W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

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

...ATLC TROPICAL STORM WARNING...
.TROPICAL STORM GERT NEAR 28.2N 54.9W 1006 MB AT 0300 UTC SEP 02
MOVING N OR 360 DEG AT 0 KT. MAXIMUM SUSTAINED WINDS 40 KT GUSTS
50 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM N SEMICIRCLE AND 
30 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 75 NM NE 
QUADRANT AND 30 NM NE QUDRANT WITH SEAS TO 13 FT. ELSEWHERE 
WITHIN 28N53W TO 29N55W TO 28N56W TO 27N56W TO 27N54W TO 28N53W 
WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 
28N51W TO 30N53W TO 30N54W TO 26N55W TO 26N52W TO 28N51W WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM GERT NEAR 29.1N 53.8W. MAXIMUM 
SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS 
WITHIN 0 NM N SEMICIRCLE...40 NM SE QUADRANT AND 30 NM SW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 105 NM NE QUADRANT WITH 
SEAS TO 13 FT. ELSEWHERE WITHIN 30N53W TO 30N54W TO 29N55W TO 
28N55W TO 28N53W TO 28N52W TO 30N53W WINDS 20 TO 33 KT. SEAS 10 
TO 12 FT. REMAINDER OF AREA WITHIN 31N50W TO 31N53W TO 28N53W TO 
28N52W TO 29N50W TO 31N50W WINDS 20 KT OR LESS. SEAS 10 TO 12 FT 
IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM GERT NEAR 32.0N 52.4W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS N 
OF AREA. WITHIN 31N46W TO 31N53W TO 30N53W TO 28N52W TO 28N49W TO
31N46W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.60 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.

.SYNOPSIS AND FORECAST.

.ATLC 48 HOUR FORECAST POST-TROPICAL REMNANT LOW TWELVE E OF
WATERS NEAR 26.2N 33.7W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 
KT. WITHIN 31N35W TO 31N37W TO 30N39W TO 27N37W TO 27N35W TO 
31N35W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.

.CARIBBEAN WITHIN 13N69W TO 14N75W TO 11N74W TO 12N72W TO 11N72W
TO 12N69W TO 13N69W...INCLUDING THE GULF OF VENEZUELA...NE TO E 
WINDS 20 TO 30 KT. SEAS 8 TO 9 FT.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

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

$$
.FORECASTER ARREINHART. NATIONAL HURRICANE CENTER.