FZNT01 KWBC 190423
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
0430 UTC TUE SEP 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 0000 UTC SEP 19. 
24 HOUR FORECAST VALID 0000 UTC SEP 20. 
48 HOUR FORECAST VALID 0000 UTC SEP 21. 

.WARNINGS. 

...HURRICANE WARNING... 
.SEE PART 2 BELOW. IN ASSOCIATION WITH HURRICANE NIGEL S OF
AREA...FROM 31N TO 34N BETWEEN 44W AND 58W AREA OF E TO NE WINDS
20 TO 33 KT. SEAS TO 12 FT IN SE SWELL.
.24 HOUR FORECAST HURRICANE NIGEL 32.1N 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 120
NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 270 NM NE...240 NM
SE...180 NM SW...AND 210 NM NW QUADRANTS WITH SEAS TO 35 FT.
ELSEWHERE FROM 31N TO 37N BETWEEN 48W AND 60W WINDS 20 TO 33 KT.
SEAS TO 12 FT.
.48 HOUR FORECAST HURRICANE NIGEL NEAR 37.6N 51.6W. MAXIMUM
SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL STORM FORCE WINDS
WITHIN 160 NM NE QUADRANT...160 NM SE QUADRANT...130 NM SW
QUADRANT...AND 110 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
240 NM OF CENTER...EXCEPT 270 NM NW QUADRANT WITH SEAS TO 37 FT.
ELSEWHERE FROM 31N TO 41N BETWEEN 47W AND 61W WINDS 20 TO 33 KT.
SEAS TO 12 FT.
.72 HOUR FORECAST HURRICANE NIGEL NEAR 43.4N 39.5W. MAXIMUM
SUSTAINED WINDS 70 KT GUSTS 85 KT. 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL CYCLONE NIGEL NEAR 50.0N 24.7W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.
.120 HOUR FORECAST POST-TROPICAL CYCLONE NIGEL NEAR 57.0N 17.4W.
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 ... 
.LOW E OF AREA NEAR 63N26W 990 MB MOVING SW 20 KT WILL TURN SE
AFTER 24 HOURS. E OF A LINE FROM 66N36W TO 63N41W TO 58N42W AREA
OF N TO NE WINDS 25 TO 40 KT. SEAS 15 TO 27 FT. ELSEWHERE N OF
55N E OF 47W WINDS TO 25 KT. SEAS 10 TO 19 FT.
.24 HOUR FORECAST LOW E OF AREA NEAR 58N32W 993 MB. WITHIN 480 NM
W SEMICIRCLE WINDS 25 TO 40 KT. SEAS 14 TO 24 FT. ELSEWHERE
WITHIN 540 NM W SEMICIRCLE...AND WITHIN 180 NM E OF A LINE FROM
56N48W TO 66N57W WINDS 20 TO 30 KT. SEAS 9 TO 18 FT.
.48 HOUR FORECAST LOW ABSORBED BY LOW WELL E OF AREA. E OF A LINE
FROM 65N39W TO 53N43W TO 43N50W WINDS TO 25 KT. SEAS 8 TO 15 FT
IN MIXED SWELL.

...GALE WARNING... 
.LOW E OF AREA NEAR 53N33W 989 MB MOVING NE 35 KT. WITHIN 600 NM
SW QUADRANT WINDS 25 TO 40 KT. SEAS 12 TO 20 FT. ELSEWHERE WITHIN
780 NM W AND SW QUADRANTS WINDS 20 TO 30 KT. SEAS 9 TO 18 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS E OF AREA.

...GALE WARNING... 
.LOW 41N71W 1001 MB MOVING NE 20 KT. WITHIN 240 NM E AND SE
QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. ELSEWHERE FROM 32N
TO 43N BETWEEN 64W AND 75W WINDS TO 25 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW INLAND NEAR 47N66W 999 MB. WITHIN 360 NM E
AND NE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. ELSEWHERE
FROM 40N TO 52N W OF 52W WINDS TO 25 KT. SEAS TO 12 FT.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 50N53W 1004 MB.
FRONT TO EXTEND FROM 49N61W TO 51N50W TO 44N49W. WITHIN 180 NM NE
AND E OF FRONT N OF 46N...AND WITHIN 180 NM W SEMICIRCLE...WINDS
25 TO 35 KT. SEAS TO 12 FT. ELSEWHERE FROM 43N TO 55N BETWEEN 43W
AND 65W WINDS TO 25 KT. SEAS TO 10 FT.

.SYNOPSIS AND FORECAST. 

.LOW 39N42W 1012 MB MOVING SE 15 KT. WITHIN 300 NM E
SEMICIRCLE...AND 180 NM SW AND 120 NM NW QUADRANTS WINDS 20 TO 30
KT. SEAS 8 TO 15 FT.
.24 HOUR FORECAST LOW 38N36W 1014 MB. WITHIN 180 NM OF LOW CENTER
WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS E OF AREA.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 45N
BETWEEN 64W AND 70W...AND N OF 61N E OF 40W. 
.24 HOUR FORECAST DENSE FOG FROM 45N TO 51N BETWEEN 56W AND 66W.
.48 HOUR FORECAST DENSE FOG FROM 38N TO 51N BETWEEN 47W AND 56W.

.FORECASTER MILLS. 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 TUE SEP 19.
24 HOUR FORECAST VALID 0000 UTC WED SEP 20.
48 HOUR FORECAST VALID 0000 UTC THU SEP 21.

.WARNINGS.

...ATLC HURRICANE WARNING...
.HURRICANE NIGEL NEAR 28.6N 52.7W 979 MB AT 0300 UTC SEP 19 
MOVING NW OR 320 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 75 KT 
GUSTS 90 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 32 FT. ELSEWHERE WITHIN 330 NM NE 
QUADRANT...300 NM SE QUADRANT...180 NM SW QUADRANT AND 240 NW 
QUADRANT WINDS 20 TO 33 KT. SEAS 10 TO 14 FT. REMAINDER OF AREA 
FROM 19N TO 31N BETWEEN 42W AND 60W WINDS 20 KT OR LESS. SEAS 8 
TO 10 FT IN MIXED SWELL. 
.24 HOUR FORECAST HURRICANE NIGEL JUST N OF AREA NEAR 32.1N 
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 120 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 35 FT. ELSEWHERE WITHIN 240 NM E SEMICIRCLE...180 NM SW 
QUADRANT AND 210 NM NW QUADRANT WINDS 20 TO 33 KT. SEAS 10 TO 16 
FT. REMAINDER OF AREA OVER FORECAST WATERS FROM 24N TO 31N 
BETWEEN 47W AND 63W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN 
MIXED SWELL.  
.48 HOUR FORECAST HURRICANE NIGEL WELL N OF AREA NEAR 37.6N 
51.6W. MAXIMUM SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL 
STORM FORCE WINDS WITHIN 160 NM E SEMICIRCLE...130 NM SW 
QUADRANT AND 110 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
240 NM OF CENTER OF NIGEL...EXCEPT 270 NM NW QUADRANT WITH SEAS 
TO 37 FT. ELSEWHERE WITHIN 360 NM NE QUADRANT...240 NM S 
SEMICIRCLE AND 270 NM NW QUADRANT WINDS 20 TO 33 KT. SEAS 10 TO 
14 FT. REMAINDER OF AREA OVER FORECAST WATERS FROM 29N TO 31N 
BETWEEN 48W AND 58W WINDS 20 KT OR LESS. SEAS 8 FT IN DECAYING 
NW TO N SWELL. 
.72 HOUR FORECAST HURRICANE NIGEL WELL N OF AREA NEAR 43.4N 
39.5W. MAXIMUM SUSTAINED WINDS 70 KT GUSTS 85 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EXTRATROPICAL NIGEL WELL N OF 
AREA NEAR 50.0N 24.7W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL NIGEL WELL N OF 
AREA NEAR 57.0N 17.4W. 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 FROM 19N TO 19N E OF 41W WINDS 20 KT OR LESS. SEAS 8 TO 9 
FT IN NE SWELL.
.24 HOUR FORECAST TROPICAL WAVE ALONG 40W S OF 22N. FROM 16N TO 
27N E OF 47W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE SWELL.
.48 HOUR FORECAST TROPICAL WAVE ALONG 47W S OF 22N. FROM 16N TO 
26N E OF 48W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE SWELL.

.CARIBBEAN FROM 11N TO 13N BETWEEN 70W AND 74W...INCLUDING
THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS LESS 
THAN 8 FT.
.09 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST FROM 11N TO 13N BETWEEN 69W AND 
73W...INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 
KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST FROM 11N TO 13N BETWEEN 70W AND 
73W...INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 
KT. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 11N TO 13N BETWEEN 70W AND 74W... 
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 AGUIRRE. NATIONAL HURRICANE CENTER.