HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC WED DEC 10 2025
CCODE/2:31:04:01:00/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC DEC 10.
24 HOUR FORECAST VALID 0000 UTC DEC 11.
48 HOUR FORECAST VALID 0000 UTC DEC 12.
.WARNINGS.
...HURRICANE FORCE WIND WARNING...
.COMPLEX LOW WITH MAIN CENTER 54N42W 956 MB MOVING NE 10 KT.
WITHIN 180 NM S SEMICIRCLE WINDS 65 TO 75 KT. SEAS 9 TO 13 M.
ALSO WITHIN 300 NM S SEMICIRCLE...AND WITHIN 120 NM N OF A LINE
FROM 58N48W TO 59N42W TO 62N40W TO 65N31W WINDS 50 TO 65 KT. SEAS
6 TO 11 M. ELSEWHERE FROM 47N TO 57N E OF 54W...AND WITHIN 180 NM
N AND W OF A LINE FROM 57N50W TO 59N40W TO 63N30W WINDS 35 TO 50
KT. SEAS 4 TO 8 M. OTHERWISE FROM 43N TO 60N E OF 62W...INCLUDING
WITHIN THE GULF OF SAINT LAWRENCE...WINDS 25 TO 35 KT. SEAS 3 TO
6 M...EXCEPT SEAS TO 4 M WITHIN THE GULF OF SAINT LAWRENCE.
.24 HOUR FORECAST COMBINED LOW 56N36W 956 MB. BETWEEN 180 NM AND
420 NM SW SEMICIRCLE...AND WITHIN 120 NM NW OF A LINE FROM 57N42W
TO 62N39W WINDS 55 TO 70 KT. SEAS 9 TO 13.5 M...HIGHEST NEAR
52N40W. ALSO FROM 45N TO 55N E OF 50W...AND WITHIN 180 NM NW OF A
LINE FROM 57N42W TO 61N39W TO 65N30W WINDS 40 TO 55 KT. SEAS 7 TO
12 M. ELSEWHERE N OF 40N E OF 57W...EXCEPT FROM 57N TO 62N
BETWEEN 47W AND 54W WINDS 25 TO 40 KT. SEAS 4 TO 8 M. OTHERWISE S
OF 40N E OF 50W WINDS TO 25 KT. SEAS 3 TO 6 M...HIGHEST NEAR
39N37W.
.48 HOUR FORECAST LOW E OF AREA AND ASSOCIATED CONDITIONS
DESCRIBED WITH LOW 60N30W BELOW.
...STORM WARNING...
.COMPLEX LOW WITH FIRST CENTER 41N38W 997 MB MOVING NE 40 KT AND
RAPIDLY INTENSIFYING AND SECOND CENTER 38N46W 998 MB MOVING NE 40
KT AND INTENSIFYING. WITHIN 420 NM S QUADRANT OF FIRST
CENTER...AND WITHIN 300 NM S...540 NM SW...AND 420 NM W QUADRANTS
OF SECOND CENTER WINDS 30 TO 45 KT. SEAS 4 TO 6 M. ELSEWHERE S OF
43N E OF 60W AND S OF 38N E OF 69W WINDS 20 TO 30 KT. SEAS 3 TO 5
M.
.06 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 43N34W 990 MB AND
SECOND CENTER 41N38W 996 MB. FROM 34N TO 44N E OF 53W WINDS 35 TO
50 KT. SEAS 4 TO 7 M.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS DESCRIBED WITH
LOW 56N36W ABOVE.
...STORM WARNING...
.18 HOUR FORECAST LOW INLAND 44N80W 990 MB. FROM 33N TO 43N W OF
59W WINDS 25 TO 35 KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST LOW INLAND 45N77W 988 MB. FROM 33N TO 45N W OF
55W WINDS 25 TO 40 KT. SEAS 2.5 TO 4.5 M...HIGHEST NEAR 40N60W.
.36 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER INLAND NEAR 48N66W
982 MB. BETWEEN 300 NM AND 660 NM E AND SE QUADRANTS WINDS 35 TO
50 KT. SEAS 3 TO 5 M IN S TO SW SWELL.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER INLAND NEAR 50N63W
980 MB. WITHIN 600 NM E AND 900 NM SW QUADRANTS...AND BETWEEN 420
NM AND 1080 NM SE QUADRANT WINDS 25 TO 40 KT. SEAS 3 TO 6 M IN
MIXED SWELL. ELSEWHERE S OF 53N BETWEEN 40W AND 74W...EXCEPT S OF
35N BETWEEN 40W AND 52W WINDS TO 25 KT. SEAS 2.5 TO 5 M.
...STORM WARNING...
.36 HOUR FORECAST LOW E OF AREA 61N27W 937 MB. N OF 59N E OF 43W
WINDS 40 TO 55 KT. SEAS 6 TO 9.5 M IN N TO NW SWELL.
.48 HOUR FORECAST LOW E OF AREA 60N30W 940 MB. WITHIN 300 NM SW
QUADRANT AND BETWEEN 300 NM AND 480 NM NW QUADRANT WINDS 40 TO 55
KT. SEAS 6 TO 10 M...HIGHEST ALONG 35W. ALSO N OF 40N W OF 40W
WINDS 25 TO 40 KT. SEAS 4 TO 7.5 M...HIGHEST NEAR
46N36W...ELSEWHERE FROM 50N TO 60N E OF 50W AND FROM 34N TO 40N E
OF 41W WINDS TO 25 KT. SEAS 3 TO 6.5 M.
...GALE WARNING...
.NW OF A LINE FROM 60N63W TO 67N56W AREA OF N TO NE WINDS 25 TO
35 KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST N OF 60N BETWEEN 54W AND 62W AREA OF N WINDS 25
TO 35 KT. SEAS 2.5 TO 3.5 M.
.48 HOUR FORECAST N OF 62N BETWEEN 54W AND 61W AREA OF N WINDS 25
TO 40 KT. SEAS 2.5 TO 4.5 M.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY FROM 51N TO 56N W OF 51W.
ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N AND W OF A LINE FROM
45N60W TO 48N47W TO 54N49W TO 59N63W...AND N OF 63N W OF 58W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY FROM 52N TO
55N W OF 53W...AND N OF 65N W OF 59W. ELSEWHERE LIGHT TO MODERATE
FREEZING SPRAY WITHIN THE GULF OF SAINT LAWRENCE N OF 49N...FROM
49N TO 56N W OF 51W...AND NW OF A LINE FROM 60N64W TO 67N54W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 64N
BETWEEN 58W AND 62W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N
OF 61N W OF 57W AND WITHIN 90 NM OF W GREENLAND COAST N OF 64N.
.SYNOPSIS AND FORECAST.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF 60N E OF
GREENLAND...N OF A LINE FROM 48N35W TO 50N45W TO 58N62W...AND N
OF 41N W OF 64W.
.24 HOUR FORECAST DENSE FOG N OF 60N E OF GREENLAND...FROM 45N TO
60N E OF 40W...FROM 53N TO 60N BETWEEN 40W AND 50W...FROM 54N TO
58N W OF 50W...AND FROM 44N TO 51N W OF 50W...INCLUDING WITHIN
THE GULF OF SAINT LAWRENCE.
.48 HOUR FORECAST DENSE FOG N OF 58N E OF 41W...FROM 41N TO 57N W
OF 44W...AND N OF 63N W OF 55W.
.FORECASTER ANDERSON. 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 0000 UTC WED DEC 10.
24 HOUR FORECAST VALID 0000 UTC THU DEC 11.
48 HOUR FORECAST VALID 0000 UTC FRI DEC 12.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC COLD FRONT FROM 31N59W TO 25N74WW. E OF FRONT...WITHIN
31N46W TO 31N51W TO 31N59W TO 29N58W TO 29.5N52W TO 30N50.5W
TO 31N59W SW WINDS 20 TO 25 KT. SEAS 2.5 TO 3.5 M IN MIXED N AND
W SWELL. ELSEWHERE WITHIN 31N43W TO 31N55W TO 31N65W TO 31N78W
TO 29N75W TO 28N62W TO 28N50W TO 31N43W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3 M IN NW TO N SWELL.
.24 HOUR FORECAST STATIONARY FRONT FROM 31N39W TO 31N56W. WITHIN
31N36W TO 31N54W TO 31N65W TO 26N70W TO 25N64W TO 28N50W TO
31N36W WINDS 20 KT OR LESS. SEAS 2.5 TO 4 M IN NW TO N SWELL E OF
50W AND IN N TO NE SWELL W OF 50W.
.48 HOUR FORECAST FRONT TO LIFT N OF 31N. WITHIN 31N35W TO
31N50W TO 26N60W TO 23N62W TO 20N64W TO 20N48W TO 20N35W TO
31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN N SWELL...
EXCEPT MIXED WITH E SWELL W OF 40W.
.ATLC 27 HOUR FORECAST COLD FRONT FROM 31N78W TO 28N80W. WITHIN
31N75W TO 31N81W TO 30N81W TO 30N79W TO 30N77W TO 31N75W SW TO W
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST COLD FRONT FROM 31N69W TO 27N72W TO 22N78W. E
OF FRONT...WITHIN 31N57W TO 31N69W TO 28N66W TO 29N62W TO
29.5N61W TO 30N58W TO 31N57W SW WINDS 20 TO 25 KT. SEAS 2.5 TO 3
M. ELSEWHERE WITHIN 31N55W TO 31N65W TO 31N76W TO 28N77W TO
29N67W TO 28N66W TO 29N58W TO 31N55W WINDS 20 KT OR LESS. SEAS
2.5 TO 3 M IN MIXED SWELL BETWEEN 55W AND 66W AND IN NW SWELL W
OF 66W.
.ATLC WITHIN 18N46W TO 19N48W TO 17N51W TO 17N56W TO 14N52W TO
13N47W TO 18N46W WINDS 20 KT OR LESS. SEAS 2.5 M IN E SWELL.
.24 HOUR FORECAST WITHIN 20N52W TO 17N58W TO 13N55W TO 11N59W TO
06N50W TO 08N38W TO 20N52W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M
IN E SWELL.
.48 HOUR FORECAST WITHIN 18N38W TO 19N49W TO 13N51W TO 08N40W TO
11N37W TO 14N42W TO 18N38W NE TO E WINDS 20 TO 25 KT. SEAS 3 TO
3.5 M. ELSEWHERE WITHIN 24N35W TO 24N62W TO 21N65W TO 09N58W TO
12N46W TO 07N35W TO 24N35W...INCLUDING IN ATLC EXPOSURES AND
PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN MIXED E AND
N SWELL.
.ATLC WITHIN 31N35W TO 31N43W TO 24N46W TO 20N51W TO 20N35W TO
31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN N SWELL.
.24 HOUR FORECAST WITHIN 27N35W TO 23N46W TO 20N56W TO 20N45W TO
20N35W TO 27N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN N
SWELL.
.48 HOUR FORECAST CONDITIONS TO MERGE WITH THOSE AS DESCRIBED
ABOVE.
.CARIBBEAN WITHIN 13N70W TO 13N74W TO 13N75W TO 12N73W TO 11N71W
TO 12N70W TO 13N70W...INCLUDING THE GULF OF VENEZUELA...NE TO E
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WITHIN 12N70W TO 13N73W TO 14N75W TO 13N76W TO
12N75W TO 12N72W TO 12N70W...INCLUDING THE GULF OF VENEZUELA...
NE TO E WINDS 20 TO 25 KT. SEAS 2.5 M OUTSIDE THE GULF OF
VENEZUELA. WITHIN 13N73W TO 14N75W TO 13N77W TO 12N78W TO
11.5N77W TO 13N75W TO 13N73W WINDS 20 KT OR LESS. SEAS 2.5 M IN
NE TO E SWELL.
.GULF OF AMERICA WITHIN 25N84W TO 26N87W TO 26N88W TO 25N88W TO
24N85W TO 25N83W TO 25N84W NE WINDS 20 TO 25 KT. SEAS 2.5 TO 3 M.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.
$$