FZNT01 KWBC 012149
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
2230 UTC FRI SEP 01 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 SEP 01. 
24 HOUR FORECAST VALID 1800 UTC SEP 02. 
48 HOUR FORECAST VALID 1800 UTC SEP 03. 

.WARNINGS. 

...HURRICANE FORCE WIND WARNING... 
.POST-TROPICAL CYCLONE FRANKLIN NEAR 39.5N 53.8W 979 MB AT 2100 
UTC SEP 01 MOVING NE OR 055 DEG AT 15 KT. MAXIMUM SUSTAINED 
WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS WITHIN 100 
NM NE...170 NM SE...130 NM S...AND 220 NM NW QUADRANTS. SEAS 12 
FT OR GREATER WITHIN 300 NM NE AND SW...360 NM NW AND 270 NM SE 
QUADRANTS WITH SEAS TO 30 FT. ELSEWHERE WITHIN 360 NM E AND 480 
NM W SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 15 FT. 
.24 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 43.6N 
45.6W 982 MB. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. 
TROPICAL STORM FORCE WINDS WITHIN 200 NM E SEMICIRCLE...AND 160 
NM SW AND 180 NM NW QUADRANTS. SEAS 12 FT OR GREATER WITHIN 420 
NM E SEMICIRCLE... AND 600 NM SW AND 360 NM NW QUADRANTS WITH 
SEAS TO 36 FT. ELSEWHERE FROM 37N TO 49N E OF 51W WINDS 20 TO 33 
KT. SEAS 8 TO 14 FT. 
.48 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 46.8N 
36.7W 985 MB. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. 
TROPICAL STORM FORCE WINDS WITHIN WITHIN 150 NM S 
SEMICIRCLE...AND 130 NM NE AND 160 NM NW QUADRANTS. SEAS 12 FT 
OR GREATER WITHIN 300 NM N SEMICIRCLE...AND 480 NM SE AND 660 NM 
SW QUADRANTS WITH SEAS TO 32 FT. ELSEWHERE FROM 42N TO 52N E OF 
43W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
.72 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 48.0N 
29.5W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. 
.96 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 47.5N 
26.0W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. 
.120 HOUR FORECAST POST-TROPICAL CYCLONE FRANKLIN NEAR 46.0N 
20.5W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. 

...TROPICAL STORM WARNING... 
.POST-TROPICAL CYCLONE IDALIA NEAR 32.0N 66.5W 1000 MB AT 2100 
UTC SEP 01 MOVING ESE OR 105 DEG AT 13 KT. MAXIMUM SUSTAINED 
WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 210 
NM NE...120 NM SE...180 NM SW...AND 190 NM NW QUADRANTS. SEAS 12 
FT OR GREATER WITHIN 300 NM NE...240 NM SE...360 NM SW...AND 420 
NM NW QUADRANTS WITH SEAS TO 21 FT. ELSEWHERE EXCEPT WHERE NOTED 
ABOVE WITH HURRICANE 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 LOW IDALIA NEAR 31.5N 64.1W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 180 NM NE...40 NM SE...90 NM SW AND 140 NM NW 
QUADRANTS. 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 TROPICAL STORM IDALIA NEAR 33.7N 60.6W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 180 NM NE...100 NM SE...80 NM SW...AND 120 NM NW 
QUADRANTS. 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 CYCLONE IDALIA NEAR 37.8N 58.2W. 
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. 
.96 HOUR FORECAST POST-TROPICAL CYCLONE IDALIA NEAR 40.9N 58.4W. 
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL CYCLONE IDALIA NEAR 42.0N 
58.6W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. 

...TROPICAL STORM WARNING... 
.TROPICAL STORM JOSE NEAR 39.4N 49.1W 996 MB AT 2100 UTC SEP 01 
MOVING NNE OR 020 DEG AT 28 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM E 
SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 90 NM N SEMICIRCLE AND 
120 NM S SEMICIRCLE WITH SEAS TO 16 FT. ELSEWHERE EXCEPT WHERE 
NOTED ABOVE WITH HURRICANE FRANKLIN FROM 34N TO 42N BETWEEN 44W 
AND 51W WINDS 20 TO 33 KT. SEAS 8 TO 13 FT. 
.24 HOUR FORECAST...DISSIPATED. 

...TROPICAL STORM WARNING...
.48 HOUR FORECAST TROPICAL STORM GERT NEAR 30.6N 51.9W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS 
WITHIN 40 NM E 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.
.72 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 62N39W 960 MB MOVING NE 20 KT. BETWEEN 120 NM AND 360 NM S 
SEMICIRCLE...AND WITHIN 90 NM W OF A LINE FROM 66N35W TO 63N39W 
TO 60N39W WINDS 40 TO 55 KT. SEAS 19 TO 34 FT...EXCEPT W OF THE 
AFOREMENTIONED LINE 12 TO 19 FT. ELSEWHERE WITHIN 540 NM 
NE...840 NM SE...660 NM SW AND 540 NM NW QUADRANTS WINDS 25 TO 
40 KT. SEAS 10 TO 22 FT.
.24 HOUR FORECAST LOW JUST E OF AREA 65N33W 965 MB. WITHIN 150 
NM S OF A LINE FROM 61N35W TO 60N44W TO 61N47W WINDS 45 TO 60 
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. FROM 58N TO 
60N E OF 44W WINDS 35 TO 50 KT. SEAS 14 TO 24 FT. ELSEWHERE 
WITHIN 480 NM SW AND 240 NM NW QUADRANTS WINDS 25 TO 35 KT. SEAS 
8 TO 14 FT.

...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 CLARK. 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 1800 UTC FRI SEP 01.
24 HOUR FORECAST VALID 1800 UTC SAT SEP 02.
48 HOUR FORECAST VALID 1800 UTC SUN SEP 03.

.WARNINGS.

...ATLC GALE WARNING...
...ATLC TROPICAL STORM WARNING...
.POST-TROPICAL CYCLONE IDALIA NEAR 32.0N 66.5W 1000 MB AT 2100 
UTC SEP 01 MOVING ESE OR 105 DEG AT 13 KT. MAXIMUM SUSTAINED 
WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 210 
NM NE QUADRANT...120 NM SE QUADRANT...180 NM SW QUADRANT...AND 
190 NM NW QUADRANT. N OF 29N BETWEEN 66W AND 74W NW TO N WINDS 
30 TO 35 KT. SEAS 12 TO 20 FT. N OF 29N BETWEEN 64W AND 66W SW 
TO W WINDS 30 TO 35 KT. SEAS 12 TO 16 FT. ELSEWHERE N OF 28N 
BETWEEN 62W AND 75W SW TO W WINDS 20 TO 30 KT...EXCEPT NW TO N 
WINDS W OF 66W. SEAS 8 TO 12 FT. N OF 28N BETWEEN 75W AND 78W 
WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN N SWELL.
.12 HOUR FORECAST POST-TROPICAL EXTRATROPICAL IDALIA NEAR 31.7N 
65.3W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
.24 HOUR FORECAST TROPICAL STORM IDALIA NEAR 31.5N 64.1W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 180 NM NE QUADRANT...40 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 140 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
300 NM NW AND 180 NM SE SEMICIRCLES WITH SEAS TO 18 FT. 
ELSEWHERE OVER FORECAST WATERS N OF 27N BETWEEN 60W AND 72W 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT N OF 23N BETWEEN 55W AND 78W 
AND E OF THE BAHAMAS.
.48 HOUR FORECAST TROPICAL STORM IDALIA N OF AREA NEAR 33.7N 
60.6W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM 
FORCE WINDS WITHIN 180 NM NE QUADRANT...100 NM SE QUADRANT...80 
NM SW QUADRANT...AND 120 NM NW QUADRANT. SEAS 12 FT OR GREATER 
WITHIN 240 NM NW AND 210 NM SE SEMICIRCLES WITH SEAS TO 20 FT. 
OVER FORECAST WATERS N OF 27N BETWEEN 57W AND 70W WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT N OF 25N BETWEEN 55W AND 70W...AND N OF 22N 
BETWEEN 70W AND 78W AND E OF THE BAHAMAS. 
.72 HOUR FORECAST POST-TROP/EXTRATROPICAL LOW IDALIA NEAR 37.8N 
58.2W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. 
.96 HOUR FORECAST POST-TROP/EXTRATROPICAL LOW IDALIA NEAR 40.9N 
58.4W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST EXTRATROPICAL LOW IDALIA POST-TROP/EXTRATROP 
NEAR 42.0N 58.6W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

...ATLC TROPICAL STORM WARNING...
.TROPICAL STORM GERT NEAR 27.8N 54.4W 1006 MB AT 2100 UTC SEP 01 
MOVING ESE OR 115 DEG AT 4 KT. MAXIMUM SUSTAINED WINDS 35 KT 
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM N SEMICIRCLE 
AND 30 NM S SEMICIRCLE. ELSEWHERE WITHIN 90 NM S AND 60 NM N 
SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST TROPICAL STORM GERT NEAR 28.4N 53.2W. 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 TO 12 FT WITHIN THE AREA OF TROPICAL STORM FORCE 
WINDS. ELSEWHERE WITHIN 90 NM S AND 60 NM N SEMICIRCLES WINDS 20 
TO 33 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM GERT NEAR 30.6N 51.9W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS 
WITHIN 40 NM E SEMICIRCLE AND 0 NM W SEMICIRCLE. SEAS TO 12 FT 
WITHIN 45 NM E SEMICIRCLE. ELSEWHERE WITHIN 90 NM E AND 60 NM W 
SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.60 HOUR FORECAST POST-TROPICAL EXTRATROPICAL GERT NEAR 33.0N 
51.2W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.72 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 HURRICANE FRANKLIN WELL N OF AREA. ELSEWHERE N OF 27 E OF 
55W TO A LINE FROM 31N48W TO 27N51W WINDS 20 KT OR LESS. SEAS 8 
TO 10 FT IN NW SWELL.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

CARIBBEAN FROM 11N TO 17.5N BETWEEN 70W AND 80W...INCLUDING THE 
GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

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

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.