FZNT01 KWBC 182208
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
2230 UTC MON SEP 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 1800 UTC SEP 18. 
24 HOUR FORECAST VALID 1800 UTC SEP 19. 
48 HOUR FORECAST VALID 1800 UTC SEP 20. 

.WARNINGS. 

...HURRICANE WARNING... 
.SEE PART 2 BELOW. IN ASSOCIATION WITH HURRICANE NIGEL S OF 
AREA...FROM 31N TO 34N BETWEEN 43W AND 57W AREA OF E TO NE WINDS 
TO 25 KT. SEAS 8 TO 12 FT IN SE SWELL. 
.24 HOUR FORECAST HURRICANE NIGEL 31.0N 54.5W. MAXIMUM SUSTAINED 
WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 140 
NM NE QUADRANT...130 NM SE QUADRANT...90 NM SW QUADRANT...AND 
110 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 210 NM W 
SEMICIRCLE...270 NM NE QUADRANT AND 240 NM SE QUADRANT WITH SEAS 
TO 40 FT. ELSWHERE IN ASSOCIATION WITH HURRICANE NIGEL FROM 31N 
TO 37N BETWEEN 47W AND 60W WINDS 20 TO 33 KT. SEAS TO 12 FT. 
.48 HOUR FORECAST HURRICANE NIGEL NEAR 36.2N 53.5W. MAXIMUM
SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE WINDS
WITHIN 140 NM NE QUADRANT...150 NM SE QUADRANT...110 NM SW
QUADRANT...AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER
WITHIN 270 NM OF CENTER WITH SEAS TO 38 FT.
.72 HOUR FORECAST HURRICANE NIGEL NEAR 42.1N 43.9W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EXTRATROPICAL NIGEL NEAR 48.0N
29.0W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL NIGEL NEAR 56.0N
18.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.

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

...GALE WARNING ... 
.E OF A LINE FROM 66N35W TO 62N40W TO 59N40W AREA OF N TO NE 
WINDS 25 TO 40 KT. SEAS 16 TO 27 FT. ELSEWHERE N OF 57N E OF 53W 
WINDS TO 25 KT. SEAS 9 TO 16 FT...EXCEPT W OF 44W SEAS 9 FT OR 
LESS. 
.24 HOUR FORECAST NEW LOW E OF AREA NEAR 59N32W 990 MB. WITHIN 
360 NM W SEMICIRCLE WINDS 30 TO 45 KT. SEAS 17 TO 26 FT. 
ELSEWHERE N OF A LINE FROM 50N35W TO 55N44W WINDS 25 TO 35 KT. 
SEAS 10 TO 18 FT. 
.48 HOUR FORECAST LOW E OF AREA NEAR 54N18W 980 MB. E OF A LINE 
FROM 47N35W TO 55N42W TO 64N35W WINDS 20 TO 30 KT. SEAS 10 TO 18 
FT. 

...GALE WARNING... 
.LOW 53N41W 992 MB MOVING NE 35 KT. FROM 47N TO 55N BETWEEN 40W 
AND 52W WINDS 25 TO 40 KT. SEAS 10 TO 20 FT. ELSEWHERE FROM 45N 
TO 57N BETWEEN 38W AND 55W AND WITHIN 480 NM SE QUADRANT WINDS 
20 TO 30 KT. SEAS 8 TO 15 FT. 
.24 HOUR FORECAST LOW E OF AREA NEAR 55N17W 976 MB. FROM 42N TO 
50N E OF 40W AREA OF N TO NW WINDS 20 TO 30 KT. SEAS 10 TO 17 FT 
WITH MIXED SWELL. 
.48 HOUR FORECAST CONDITIONS E OF AREA. 

...GALE WARNING... 
.LOW 40N73W 1003 MB MOVING NE 20 KT. WITHIN 240 NM E AND SE 
QUADRANTS AND FROM 33N TO 38N BETWEEN 68W AND 72W WINDS 25 TO 35 
KT. SEAS 8 TO 14 FT. ELSEWHERE FROM 31N TO 42N BETWEEN 66W AND 
73W WINDS TO 25 KT. SEAS TO 9 FT. 
.24 HOUR FORECAST LOW INLAND NEAR 46N68W 1000 MB. WITHIN 360 NM 
NE QUADRANT WINDS 25 TO 35 KT. SEAS TO 11 FT. ELSEWHERE FROM 38N 
TO 51N W OF 56W WINDS TO 25 KT. SEAS TO 10 FT...HIGHEST NEAR 
41N65W.
.48 HOUR FORECAST LOW 49N60W 1004 MB. FRONT TO EXTEND FROM 
51N58W TO 50N52W TO 41N52W. WITHIN 180 NM NE AND E OF FRONT N OF 
46N WINDS 25 TO 35 KT. SEAS TO 11 FT. ELSEWHERE FROM 41N TO 50N 
BETWEEN 47W AND 65W AND WITHIN 240 NM NE AND E OF FRONT WINDS TO 
25 KT. SEAS TO 9 FT. 

.SYNOPSIS AND FORECAST.

.LOW 38N43W 1010 MB MOVING NE 15 KT NEXT 12 HOURS THEN TURNING 
SE. WITHIN 180 NM E AND SE QUADRANTS WINDS 20 TO 30 KT. SEAS 10 
TO 14 FT. ELSEWHERE FROM 34N TO 41N BETWEEN 37W AND 46W WINDS TO 
25 KT. SEAS 8 TO 10 FT 
.24 HOUR FORECAST LOW 39N36W 1012 MB. WITHIN 240 NM S AND SW AND 
180 NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. 
.48 HOUR FORECAST LOW E OF AREA NEAR 36N32W 1015 MB. WITHIN 240 
NM NW AND W QUADRANTS WINDS TO 25 KT. SEAS TO 8 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 43N TO 46N 
BETWEEN 64W AND 67W...FROM 42N TO 53N BETWEEN 35W AND 48W...AND 
N OF 63N E OF 37W. 
.24 HOUR FORECAST DENSE FOG FROM 43N TO 46N BETWEEN 59W AND 
65W...AND FROM 59N TO 63N BETWEEN 37W AND 42W. 
.48 HOUR FORECAST DENSE FOG FROM 42N TO 50N BETWEEN 48W AND 56W. 

.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 1800 UTC MON SEP 18.
24 HOUR FORECAST VALID 1800 UTC TUE SEP 19.
48 HOUR FORECAST VALID 1800 UTC WED SEP 20.

.WARNINGS.

...ATLC HURRICANE WARNING...
.HURRICANE NIGEL NEAR 28.0N 52.2W 982 MB AT 2100 UTC SEP 18 
MOVING NW OR 320 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 70 KT 
GUSTS 85 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NE 
QUADRANT...120 NM SE QUADRANT...80 NM SW QUADRANT...AND 130 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 270 NM NE QUADRANT...240 
NM SE QUADRANT...180 NM SW QUADRANT...AND 210 NM NW QUADRANT WITH
SEAS TO 31 FT. ELSEWHERE FROM 24N TO 31N BETWEEN 45W AND 56W 
WINDS 20 TO 33 KT. SEAS 10 TO 15 FT. REMAINDER OF AREA WITHIN 
31N41W TO 31N58W TO 22N59W TO 19N53W TO 22N45W TO 31N41W WINDS 20
KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE NIGEL NEAR 31.0N 54.5W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS 
WITHIN 140 NM NE QUADRANT...130 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 110 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
270 NM NE QUADRANT...240 NM SE QUADRANT...AND 210 NM W SEMICIRCLE
WITH SEAS TO 40 FT. ELSEWHERE FROM 27N TO 31N BETWEEN 48W AND 
59W WINDS 20 TO 33 KT. SEAS 11 TO 16 FT. REMAINDER OF AREA WITHIN
31N45W TO 31N61W TO 25N61W TO 24N54W TO 26N48W TO 31N45W WINDS 
20 KT OR LESS. SEAS 8 TO 13 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE NIGEL NEAR 36.2N 53.5W. MAXIMUM 
SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE WINDS 
WITHIN 140 NM NE QUADRANT...150 NM SE QUADRANT...110 NM SW 
QUADRANT...AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
270 NM OF CENTER WITH SEAS TO 38 FT. OVER FORECAST WATERS WITHIN 
31N48W TO 31N61W TO 29N58W TO 29N50W TO 31N48W WINDS 20 KT OR 
LESS. SEAS 8 TO 10 FT IN NW TO N SWELL.
.72 HOUR FORECAST HURRICANE NIGEL NEAR 42.1N 43.9W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EXTRATROPICAL NIGEL NEAR 48.0N 
29.0W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL NIGEL NEAR 56.0N 
18.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 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 29N35W TO 27N37W TO 22N38W TO 19N35W TO 29N35W
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE SWELL.
.24 HOUR FORECAST WITHIN 28N35W TO 27N40W TO 24N45W TO 19N46W TO
17N35W TO 28N35W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE 
SWELL.
.48 HOUR FORECAST WITHIN 24N35W TO 26N45W TO 22N47W TO 17N46W TO
18N35W TO 24N35W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE 
SWELL.

.CARIBBEAN WITHIN 13N69W TO 13N74W TO 11N73W TO 11N69W TO 
13N69W...INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 
30 KT. SEAS LESS THAN 8 FT.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 13N68W TO 13N74W TO 11N74W TO 11N68W TO
13N68W...INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 
30 KT. SEAS LESS THAN 8 FT.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 13N71W TO 13N73W TO 11N73W TO 11N69W TO
13N71W...INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 
25 KT. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER HAGEN. NATIONAL HURRICANE CENTER.