FZNT01 KWBC 171606
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1630 UTC SUN SEP 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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). 

FROM OCTOBER 15 TO APRIL 1, DUE TO THE CLIMATOLOGY OF THE NORTH 
ATLANTIC AND THE FREQUENCY AND VOLUME OF WEATHER HAZARDS, ALONG 
WITH CUSTOMER FEEDBACK, HIGH SEAS FORECASTS N OF 31N WILL BE 
LIMITED TO WINDS OF 25 TO 35 KNOTS AND HIGHER, AND SEAS OF 
12 FEET OR GREATER, ALONG WITH FREEZING SPRAY, DENSE FOG, AND 
VOLCANIC ASH. LESSER CONDITIONS WILL BE INCLUDED FOR WARNING 
CONDITIONS AND TO PRESERVE CONTINUITY WHERE APPROPRIATE. SEND 
FEEDBACK VIA HTTPS://OCEAN.WEATHER.GOV/CONTACT/INDEX.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 1200 UTC SEP 17. 
24 HOUR FORECAST VALID 1200 UTC SEP 18. 
48 HOUR FORECAST VALID 1200 UTC SEP 19. 

.WARNINGS.

...TROPICAL STORM WARNING...
.48 HOUR FORECAST HURRICANE NIGEL S OF AREA NEAR 29.8N 54.6W. 
MAXIMUM SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE 
WINDS WITHIN 130 NM NE QUADRANT...120 NM SE QUADRANT...90 NM SW
QUADRANT...AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
210 NM OF CENTER WITH SEAS TO 38 FT. ALSO SEE PART 2 BELOW. 

...STORM WARNING ... 
.LOW E OF AREA 62N30W 968 MB MOVING SE 15 KT. WITHIN 240 NM NW 
QUADRANT WINDS 40 TO 55 KT. SEAS 23 TO 33 FT. ALSO N OF 55N E OF 
41W AND E OF A LINE FROM 60N46W TO 56N41W WINDS 30 TO 45 KT. 
SEAS 11 TO 26 FT. ELSEWHERE N OF A LINE FROM 52N35W TO 60N48W 
WINDS 20 TO 30 KT. SEAS 8 TO 15 FT. 
.24 HOUR FORECAST LOW WELL E OF AREA NEAR 60N19W 978 MB WITH A 
NEW LOW FORMING E OF AREA NEAR 63N30W 994 MB. WITHIN 240 NM NW 
QUADRANT OF NEW LOW WINDS 35 TO 50 KT. SEAS 18 TO 26 FT. 
ELSEWHERE WITHIN 300 NM W AND NW QUADRANTS OF NEW LOW WINDS 25 
TO 40 KT. SEAS 12 TO 21 FT.
.48 HOUR FORECAST LOW 61N30W 989 MB. E OF A LINE FROM 66N35W TO 
61N41W TO 51N40W WINDS 30 TO 45 KT. SEAS 14 TO 27 FT...HIGHEST 
NEAR 64N35W.

...GALE WARNING...
.POST-TROPICAL CYCLONE MARGOT NEAR 34.6N 42.4W 1001 MB AT 1500
UTC SEP 17 MOVING WNW OR 300 DEG AT 8 KT. MAXIMUM SUSTAINED
WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM
E SEMICIRCLE...0 NM SW QUADRANT AND 60 NM NW QUADRANT.	SEAS 12
FT OR GREATER WITHIN 240 NM NE AND SW QUADRANTS...330 NM NW
QUADRANT AND 180 NM SE QUADRANT WITH SEAS TO 17 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE MARGOT NEAR 36.8N
43.1W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. SEAS 12 FT OR
GREATER WITHIN 150 NM NE AND 180 NM SE QUADRANTS AND 0 NM W 
SEMICIRCLE WITH SEAS TO 13 FT.
.48 HOUR FORECAST POST-TROPICAL MARGOT NEAR 38.4N 37.5W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS
WITHIN 60 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.
.72 HOUR FORECAST POST-TROPICAL CYCLONE MARGOT NEAR 37.2N
33.1W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 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. 

...GALE WARNING...
.POST-TROPICAL CYCLONE LEE NEAR 48.0N 62.0W 989 MB AT 1500 UTC
SEP 17 MOVING NE OR 050 DEG AT 19 KT. MAXIMUM SUSTAINED WINDS 40
KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 210 NM NE
QUADRANT...250 NM SE QUADRANT...150 NM SW QUADRANT...AND 0 NM NW
QUADRANT.  SEAS 12 FT OR GREATER WITHIN 480 NM NE QUADRANT...720
NM SE QUADRANT...540 NM SW QUADRANT...AND 0 NM NW QUADRANT WITH
SEAS TO 18 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE LEE NEAR 52.7N
47.3W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM
FORCE WINDS WITHIN 150 NM S SEMICIRCLE...100 NM NE QUADRANT AND
60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM N 
SEMICIRCLE...300 NM SE AND 360 SW QUADRANTS WITH SEAS TO 15 FT.
.48 HOUR FORECAST...DISSIPATED.

...GALE WARNING... 
.24 HOUR FORECAST NEW LOW 36N75W 1007 MB. FROM 31N TO 39N 
BETWEEN 69W AND 75W WINDS 20 TO 30 KT. SEAS TO 8 FT. 
.36 HOUR FORECAST LOW 40N71W 1004 MB. FROM 36N TO 39N BETWEEN 
66W AND 70W WINDS 25 TO 35 KT. SEAS 8 TO 11 FT. 
.48 HOUR FORECAST LOW 44N68W 1000 MB. FROM 37N TO 47N BETWEEN 
62W AND 72W WINDS 20 TO 30 KT. SEAS TO 12 FT...HIGHEST NEAR 
40N66W.

...GALE WARNING...
.36 HOUR FORECAST NEW LOW E OF AREA 54N31W 987 MB. WITHIN 420 NM 
W AND 540 NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 17 FT.
.48 HOUR FORECAST LOW WELL E OF AREA. FROM 43N TO 51N E OF 43W 
AREA OF N TO NW WINDS 20 TO 30 KT. SEAS 9 TO 16 FT IN MIXED 
SWELL.

.SYNOPSIS AND FORECAST. 

.48 HOUR FORECAST EXCEPT WHERE NOTED WITH TROPICAL STORM WARNING 
IN WARNINGS SECTION ABOVE...FROM 31N TO 35N BETWEEN 49W AND 60W 
WINDS 20 TO 33 KT. SEAS TO 12 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 46N TO 54N 
BETWEEN 42W AND 56W.
.24 HOUR FORECAST DENSE FOG FROM 51N TO 54N BETWEEN 35W AND 
53W...AND N OF 63N E OF 38W.
.48 HOUR FORECAST DENSE FOG FROM 42N TO 45N BETWEEN 64W AND 
68W...AND N OF 60N E OF 40W. 

.FORECASTER BANCROFT. 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 1200 UTC SUN SEP 17.
24 HOUR FORECAST VALID 1200 UTC MON SEP 18.
48 HOUR FORECAST VALID 1200 UTC TUE SEP 19.

.WARNINGS.

...ATLC HURRICANE WARNING...
.TROPICAL STORM NIGEL NEAR 24.0N 49.1W 997 MB AT 1500 UTC SEP 17
MOVING NNW OR 330 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 50 KT
GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE
QUADRANT...60 NM SE QUADRANT...40 NM SW QUADRANT...AND 90 NM NW
QUADRANT.  SEAS 12 FT OR GREATER WITHIN 150 NM NE QUADRANT...105
NM SE QUADRANT...90 NM SW QUADRANT...AND 120 NM NW QUADRANT WITH
SEAS TO 20 FT. ELSEWHERE WITHIN 27N45W TO 28N50W TO 26N53W TO 
23N51W TO 21N45W TO 24N44W TO 27N45W WINDS 20 TO 33 KT. SEAS 8 TO
12 FT. REMAINDER OF AREA WITHIN 29N39W TO 26N45W TO 31N51W TO 
24N54W TO 19N46W TO 22N40W TO 29N39W WINDS 20 KT OR LESS. SEAS 8
TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE NIGEL NEAR 26.8N 51.7W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 130 NM NE QUADRANT...90 NM SE QUADRANT...80 NM SW 
QUADRANT...AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
210 NM OF CENTER...EXCEPT 240 NM NE QUADRANT WITH SEAS TO 28 FT.
ELSEWHERE WITHIN 28N47W TO 31N50W TO 31N53W TO 27N55W TO 24N54W 
TO 24N48W TO 28N47W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER
OF AREA WITHIN 29N44W TO 31N58W TO 22N57W TO 20N52W TO 25N43W TO
29N44W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE NIGEL NEAR 29.8N 54.6W. MAXIMUM 
SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE WINDS 
WITHIN 130 NM NE QUADRANT...120 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
210 NM OF CENTER WITH SEAS TO 38 FT. ELSEWHERE WITHIN 31N50W TO 
31N58W TO 28N58W TO 26N53W TO 29N50W TO 31N50W WINDS 20 TO 33 KT.
SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 31N46W TO 31N50W TO 
26N55W TO 31N61W TO 20N59W TO 24N50W TO 31N46W WINDS 20 KT OR 
LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE NIGEL NEAR 34.2N 54.9W. MAXIMUM 
SUSTAINED WINDS 95 KT GUSTS 115 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE NIGEL NEAR 39.6N 49.0W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT.
.120 HOUR FORECAST HURRICANE NIGEL NEAR 46.5N 35.5W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 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 WITHIN 31N51W TO 30N69W TO 24N72W TO 23N65W TO 27N62W TO
26N54W TO 31N51W WINDS 20 KT OR LESS. SEAS TO 8 FT IN NW TO N
SWELL...EXCEPT N TO NE SWELL W OF 69W.
.24 HOUR FORECAST CONDITIONS MERGED WITH WARNING FEATURE.

.ATLC 24 HOUR FORECAST WITHIN 26N35W TO 25.5N35.5W TO 24.5N35.5W
TO 23.5N35.5W TO 23.5N35W TO 26N35W WINDS 20 KT OR LESS. SEAS 8
FT IN NE SWELL.
.48 HOUR FORECAST WITHIN 27N35W TO 25N39W TO 21N40W TO 20N39W TO
20N35W TO 27N35W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE 
SWELL.

.CARIBBEAN 06 HOUR FORECAST WITHIN 12N69W TO 13N72W TO 13N73W TO
11N73W TO 11N71W TO 11N69W TO 12N69W...INCLUDING THE GULF OF
VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 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 LEWITSKY. NATIONAL HURRICANE CENTER.