HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC THU DEC 11 2025
CCODE/1:31:04:01:00/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC DEC 11.
24 HOUR FORECAST VALID 1200 UTC DEC 12.
48 HOUR FORECAST VALID 1200 UTC DEC 13.
.WARNINGS.
...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER E OF AREA 57N25W 962 MB MOVING NE
20 KT. E OF A LINE FROM 45N35W TO 55N42W TO 56N38W TO 54N35W
WINDS 40 TO 55 KT. SEAS 6 TO 11 M...HIGHEST NEAR 51N35W.
ELSEWHERE FROM 43N TO 59N E OF 51W WINDS 25 TO 40 KT. SEAS 3.5 TO
7 M. OTHERWISE FROM 32N TO 59N E OF 54W WINDS TO 25 KT. SEAS 3 TO
6 M.
.24 HOUR FORECAST LOW ABSORBED E OF AREA. CONDITIONS DESCRIBED
WITH LOW 62N22W BELOW.
...STORM WARNING...
.LOW E OF AREA NEAR 61N27W 936 MB. WITHIN 60 NM W OF A LINE FROM
57N40W TO 60N41W TO 62N40W AND N OF 62N E OF GREENLAND WINDS 40
TO 55 KT. SEAS 6 TO 11 M...HIGHEST NEAR 54N35W. ELSEWHERE N OF
57N E OF 44W WINDS 25 TO 40 KT. SEAS 5 TO 10 M.
.24 HOUR FORECAST LOW E OF AREA 62N22W 953 MB. N OF 57N E OF 43W
WINDS 25 TO 35 KT. SEAS 4 TO 8 M.
.48 HOUR FORECAST LOW WELL NE OF AREA. CONDITIONS DESCRIBED WITH
LOW 57N47W BELOW.
...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER INLAND NEAR 48N65W 986 MB MOVING NE
25 KT. WITHIN 1020 NM SE AND 960 NM S QUADRANTS WINDS 25 TO 40
KT. SEAS 2.5 TO 5 M.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER INLAND 50N62W 982
MB AND SECOND CENTER 55N47W 971 MB. FROM 38N TO 49N BETWEEN 56W
AND 69W WINDS 35 TO 50 KT. SEAS 4 TO 7.5 M. ELSEWHERE WITHIN 180
NM N SEMICIRCLE OF SECOND CENTER... 900 NM S QUADRANT OF FIRST
CENTER... AND WITHIN 300 NM SW QUADRANT OF SECOND CENTER WINDS 25
TO 35 KT. SEAS 3 TO 6 M IN MIXED SWELL...HIGHEST NE QUADRANT OF
SECOND LOW.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER NEAR 57N47W 960
MB. WITHIN 120 NM W SEMICIRCLE...FROM 45N TO 55N BETWEEN 36W AND
52W...FROM 53N TO 59N E OF 39W...AND WITHIN 60 NM NE OF A LINE
FROM 58N47W TO 60N42W TO 63N40W WINDS 35 TO 50 KT. SEAS 5 TO 9 M.
ELSEWHERE FROM 34N TO 61N E OF 64W...INCLUDING WITHIN THE GULF OF
SAINT
LAWRENCE...AND N OF 60N E OF GREENLAND WINDS 25 TO 40 KT. SEAS 3
TO 6.5 IN MIXED SWELL...EXCEPT SEAS 2.5 TO 4 M WITHIN THE GULF OF
SAINT LAWRENCE.
...STORM WARNING...
.18 HOUR FORECAST NEW LOW TO FORM NEAR 43N52W 995 MB. WITHIN 600
NM S AND 480 NM SE QUADRANTS WINDS 35 TO 45 KT. SEAS 3 TO 6 M.
.24 HOUR FORECAST LOW 46N48W 992 MB. WITHIN 420 NM SE OF A LINE
FROM 52N35W TO 50N41W TO LOW CENTER TO 41N53W WINDS 35 TO 50 KT.
SEAS 4 TO 8 M. ELSEWHERE E OF A LINE FROM 52N35W TO 49N43W TO
36N60W TO 31N57W TO 31N48W TO 38N35W WINDS 25 TO 40 KT. SEAS 3 TO
5 M.
.48 HOUR FORECAST LOW E OF AREA AND ASSOCIATED CONDITIONS
DESCRIBED WITH LOW 57N47W ABOVE.
...GALE WARNING...
.N OF 62N BETWEEN 57W AND 62W AREA OF N WINDS 25 TO 35 KT. SEAS
2.5 TO 4 M.
.24 HOUR FORECAST N OF 56N BETWEEN 54W AND 64W AREA OF N WINDS 25
TO 40 KT. SEAS 3 TO 5.5 M.
.48 HOUR FORECAST N OF 52N BETWEEN 54W AND 62W AREA OF N TO NE
WINDS 35 TO 45 KT. SEAS 4 TO 7.5 M.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY N OF 65N BETWEEN 59W AND 61W.
ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 49N WITHIN THE
GULF OF SAINT LAWRENCE...FROM 52N TO 58N W OF 51W...AND N OF 60N
W OF 57W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 63N W OF
58W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 60N W OF
57W...WITHIN 60 NM OF THE W COAST OF GREENLAND N OF 64N...AND NW
OF A LINE FROM 40N74W TO 47N61W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY NW OF A LINE
FROM 63N61W TO 65N58W TO 67N58W. ELSEWHERE LIGHT TO MODERATE
FREEZING SPRAY N OF 65N W OF 57W...INCLUDING WITHIN THE GULF OF
SAINT LAWRENCE...AND WITHIN 60 NM OF THE E COAST OF GREENLAND N
OF 66N.
.SYNOPSIS AND FORECAST.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 55N TO 58N E OF
56W...FROM 59N TO 64N E OF 42W...AND FROM 48N TO 52N BETWEEN 51W
AND 67W...INCLUDING WITHIN THE GULF OF SAINT LAWRENCE.
.24 HOUR FORECAST DENSE FOG FROM 53N TO 58N BETWEEN 35W AND 56W
AND FROM 43N TO 49N BETWEEN 42W AND 49W.
.48 HOUR FORECAST DENSE FOG N OF 59N E OF 44W...FROM 55N TO 58N
BETWEEN 43W AND 53W...AND N OF 54N BETWEEN 56W AND 60W.
.FORECASTER HYDE. OCEAN PREDICTION CENTER.
NWS NATIONAL HURRICANE CENTER MIAMI FL
ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF AMERICA
SYNOPSIS VALID 1200 UTC THU DEC 11.
24 HOUR FORECAST VALID 1200 UTC FRI DEC 12.
48 HOUR FORECAST VALID 1200 UTC SAT DEC 13.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 20N39W TO 22N45W TO 20N59W TO 08N50W TO 09N36W TO
15N42W TO 20N39W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.5 M.
ELSEWHERE WITHIN 23N35W TO 24N62W TO 14N61W TO 06N52W TO 09N42W
TO 07N35W TO 23N35W...INCLUDING IN ATLANTIC EXPOSURES AND
PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED N AND
E TO SE SWELL.
.24 HOUR FORECAST WITHIN 21N36W TO 21N48W TO 16N55W TO 14N48W TO
07N46W TO 08N41W TO 21N36W NE TO E WINDS 20 TO 25 KT. SEAS 2.5
TO 3.5 M. ELSEWHERE WITHIN 25N35W TO 27N42W TO 23N60W TO 12N61W
TO 06N54W TO 07N35W TO 25N35W...INCLUDING IN ATLANTIC EXPOSURES
AND PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN MIXED N
AND E TO SE SWELL.
.48 HOUR FORECAST WITHIN 17N35W TO 24N35W TO 20N40W TO 20N56W TO
09N53W TO 07N43W TO 17N35W NE TO E WINDS 20 TO 25 KT. SEAS 2.5
TO 3.5 M. ELSEWHERE WITHIN 18N39W TO 31N35W TO 24N45W TO 20N63W
TO 06N53W TO 07N35W TO 18N39W...INCLUDING IN ATLANTIC EXPOSURES
AND PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN MIXED N
AND E SWELL.
.ATLC STATIONARY FRONT FROM 31N35W TO 31N43W. WITHIN 31N35W TO
30N60W TO 28N62W TO 24N55W TO 28N39W TO 31N35W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.5 M IN NE TO NW SWELL.
.24 HOUR FORECAST COLD FRONT FROM 26.5N35W TO 31N42W. WITHIN
31N35W TO 31N42W TO 28N41W TO 26N35W TO 31N35W WINDS 20 KT OR
LESS. SEAS 2.5 TO 4.0 M IN N SWELL.
.36 HOUR FORECAST COLD FRONT DISSIPATED. CONDITIONS MERGED WITH
AREAS DESCRIBED ABOVE.
.ATLC SURFACE TROUGH FROM 30.5N63W TO 25N76W. COLD FRONT FROM
31N71W TO 29N74.5W. SECOND COLD FRONT FROM 31N76W TO 28N81W.
E OF FIRST COLD FRONT WITHIN 31N61W TO 31N68W TO 29N70W TO
28N67W TO 29N63W TO 31N61W S TO SW WINDS 20 TO 25 KT. SEAS 2.5 M
IN MIXED SWELL. NEAR AND W OF SECOND COLD FRONT WITHIN 31N73W TO
31N79W TO 30N79W TO 30N77W TO 30N75W TO 31N73W W TO NW WINDS 20
TO 25 KT. SEAS 2.5 TO 3.0 M IN NW SWELL.
.24 HOUR FORECAST COLD FRONT FROM 31N61W TO 24N70W. E OF COLD
FRONT WITHIN 31N55.5W TO 31N60W TO 30.5N60W TO 30.5N58W TO
30.5N56.5W TO 31N55.5W SW WINDS 20 TO 25 KT. SEAS 2.5 TO 3.5 M.
ELSEWHERE E OF COLD FRONT WITHIN 31N53W TO 31N63W TO 30N64W TO
28N64W TO 28N58W TO 31N53W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M
IN SW TO W SWELL. W OF COLD FRONT WITHIN 31N62W TO 31N72W TO
28N70W TO 28N69W TO 30N64W TO 31N62W WINDS 20 KT OR LESS. SEAS
2.5 TO 3.0 M IN NW SWELL.
.48 HOUR FORECAST COLD FRONT FROM 31N55W TO 27.5N62W. WITHIN
31N49W TO 31N63W TO 27N60W TO 28N57W TO 31N49W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN NW SWELL.
.CARIBBEAN WITHIN 14N73W TO 16N76W TO 15N79W TO 12N79W TO 10N77W
TO 13N72W TO 14N73W NE TO E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0
M. ELSEWHERE WITHIN 13N70W TO 13N71W TO 12N71W TO
13N70W...INCLUDING THE GULF OF VENEZUELA...E WINDS 20 TO 25 KT.
SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 13N71W TO 16N74W TO 15N79W TO 12N80W TO
10N77W TO 12N73W TO 13N71W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0
M IN E SWELL.
.48 HOUR FORECAST WITHIN 15N71W TO 16N78W TO 14N78W TO 11N81W TO
10N76W TO 13N71W TO 15N71W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0
M. ELSEWHERE WITHIN 18N72W TO 17N74W TO 15N72W TO 11N72W TO
11N70W TO 15N72W TO 18N72W...INCLUDING THE GULF OF VENEZUELA...E
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.FORECASTER ADAMS. NATIONAL HURRICANE CENTER.
$$