HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC WED DEC 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 17.
24 HOUR FORECAST VALID 0000 UTC DEC 18.
48 HOUR FORECAST VALID 0000 UTC DEC 19.
.WARNINGS.
...HURRICANE FORCE WIND WARNING...
.COMPLEX LOW WITH MAIN CENTER JUST E OF THE AREA 57N32W 940 MB
MOVING NE 15 KT AND A SECOND LOW 59N39W 945 MB MOVING SE 20 KT.
FROM 50N TO 55N E OF 41W WINDS 55 TO 75 KT. SEAS 10 TO 17
M...HIGHEST NEAR 52N35W. ELSEWHERE WITHIN 360 NM N...NE...120 NM
NW...540 NM SW AND 420 NM NW QUADRANTS OF SECOND LOW AND NE AND E
OF A LINE FROM 44N40W TO 52N50W WINDS 40 TO 55 KT. SEAS 7 TO 13.5
M. ALSO WITHIN 1080 NM S...1320 NM SW AND 720 NM NW QUADRANTS OF
SECOND LOW...INCLUDING THE GULF OF SAINT LAWRENCE WINDS 25 TO 40
KT. SEAS 3.5 TO 7 M...EXCEPT TO 3.5 M IN THE GULF OF SAINT
LAWRENCE.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER E OF AREA 60N26W
949 MB...AND SECOND CENTER E OF AREA 55N27W 965 MB. E OF A LINE
FROM 50N40W TO 58N43W TO 62N41W TO 65N35W WINDS 40 TO 55 KT. SEAS
8 TO 14 M...HIGHEST NEAR 56N35W. ELSEWHERE FROM 42N TO 60N E OF
45W WINDS 25 TO 40 KT. SEAS 5.5 TO 10 M.
.48 HOUR FORECAST COMPLEX LOW WITH FIRST AND SECOND CENTER WELL E
OF THE AREA AND CONDITIONS ARE DESCRIBED BELOW IN STORM WARNING
WITH FIRST LOW 61N52W AND SECOND LOW 57N40W.
...STORM WARNING...
.FROM 36N TO 45N BETWEEN 45W AND 60W AND FROM 42N TO 50N BETWEEN
60W AND 64W INCLUDING THE GULF OF SAINT LAWRENCE AREA OF W TO NW
WINDS 20 TO 30 KT. SEAS 3.5 TO 6 M IN MIXED SWELL...HIGHEST NEAR
45W. ALSO
.12 HOUR FORECAST W AND NW OF A LINE FROM 35N71W TO 43N50W AND
FROM 43N TO 51N W OF 50W...INCLUDING THE GULF OF SAINT LAWRENCE
AREA OF SW WINDS 25 TO 35 KT. SEAS 3.5 TO 6 M...HIGHEST NEAR 50W.
SEAS TO 3.5 M IN THE GULF OF SAINT LAWRENCE.
.24 HOUR FORECAST NW AND N OF A LINE FROM 35N75W TO 40N53W TO
43N50W...FROM 43N TO 52N W OF 50W...INCLUDING THE GULF OF SAINT
LAWRENCE AND FROM 52N TO 56N BETWEEN 50W AND 54W AREA OF SW TO W
WINDS 25 TO 40 KT. SEAS 3 TO 6 M...HIGHEST NEAR THE BAY OF FUNDY
AND THE E GULF OF SAINT LAWRENCE.
.48 HOUR FORECAST NEW COMPLEX LOW TO FORM WITH MAIN CENTER 61N52W
972 MB AND A SECOND CENTER 57N40W 971 MB. WITHIN 1200 NM SE...600
NM S...300 M SW AND 360 NM W QUADRANTS OF FIRST LOW AND BETWEEN
180 NM AND 900 NM S AND SE QUADRANTS OF SECOND CENTER WINDS 40 TO
55 KT. SEAS 6 TO 10 M. ELSEWHERE WITHIN 960 NM S...420 NM
SW...540 NM W AND 480 NM NW QUADRANTS OF MAIN CENTER AND WITHIN
420 NM N AND 1080 NM S QUADRANTS OF SECOND CENTER WINDS 25 TO 40
KT. SEAS 3.5 TO 7 M.
...GALE WARNING...
.36 HOUR FORECAST NEW LOW S OF THE AREA. FROM 31N TO 34N BETWEEN
38W AND 64W WINDS 25 TO 40 KT. SEAS 2.5 TO 5 M...HIGHEST NEAR
31N59W.
.48 HOUR FORECAST LOW S OF THE AREA. WITHIN 180 NM W AND NW OF A
LINE FROM 31N56W TO 34N52W WINDS 30 TO 40 KT. SEAS 3.5 TO 6
M...HIGHEST NEAR 31N58W. ELSEWHERE FROM 31N TO 36N BETWEEN 62W
AND 50W AND FROM 34N TO 37N BETWEEN 50W AND 41W WINDS 20 TO 30
KT. SEAS 2.5 TO 4 M.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY FROM 48N TO 51N BETWEEN 53W AND
61W...INCLUDING THE NE GULF OF SAINT LAWRENCE AND W AND NW OF A
LINE FROM 51N54W TO 54N55W TO 62N61W. ELSEWHERE LIGHT TO MODERATE
FREEZING SPRAY NW OF A LINE FROM 44N62W TO 49N49W...THEN NW AND N
OF LINE FROM 49N49W TO 60N56W TO 63N50W...INCLUDING THE BAY OF
FUNDY AND THE REST OF THE GULF OF SAINT LAWRENCE.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY W OF A LINE
FROM 56N60W TO 60N60W...AND N OF 60N W OF GREENLAND.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY FROM 48N TO
51N BETWEEN 50W AND 61W...INCLUDING THE NE GULF OF SAINT LAWRENCE
AND W AND NW OF A LINE FROM 51N51W TO 59N59W TO 64N59W. ELSEWHERE
LIGHT TO MODERATE FREEZING SPRAY N OF 64N W OF GREENLAND.
.SYNOPSIS AND FORECAST.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 54N TO 60N
BETWEEN 37W AND 46W...FROM 60N TO 62N E OF GREENLAND AND N OF 65N
W OF GREENLAND.
.24 HOUR FORECAST DENSE FOG FROM 50N TO 57N BETWEEN 47W AND
56W...N OF 48N W OF 58W IN THE GULF OF SAINT LAWRENCE...WITHIN 90
NM NE OF A LINE FROM 58N41W TO 56N37W AND W OF A LINE FROM 60N58W
TO 63N60W.
.48 HOUR FORECAST DENSE FOG FROM 53N TO 60N BETWEEN 37W AND
50W...FROM 60N TO 62N W OF 40W TO GREENLAND AND NE OF A LINE FROM
59N53W TO 64N57W TO W GREENLAND.
.FORECASTER FUTTERMAN. 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 17.
24 HOUR FORECAST VALID 0000 UTC THU DEC 18.
48 HOUR FORECAST VALID 0000 UTC FRI DEC 19.
.WARNINGS.
...ATLC GALE WARNING...
.WITHIN 27N60W TO 29N56W TO 27N66W TO 27N70W TO 26N75W TO 22N75W
TO 27N60W...INCLUDING ATLANTIC EXPOSURES...NE WINDS 20 TO 25 KT.
SEAS 3.0 TO 4.0 M IN N SWELL. ELSEWHERE WITHIN 31N46W TO 30N56W
TO 31N70W TO 27N78W TO 20N69W TO 23N59W TO 31N46W...INCLUDING
ATLANTIC EXPOSURES...WINDS 20 KT OR LESS. SEAS 2.5 TO 4.5 M IN
NW TO N SWELL.
.24 HOUR FORECAST DEVELOPING LOW PRES NEAR 27.5N61.5W 1014 MB.
WITHIN 29N58W TO 30N58W TO 30N63W TO 28N65W TO 26N60W TO 28N61W
TO 29N58W N TO NE WINDS 20 TO 30 KT. SEAS 3.0 TO 3.5 M. WITHIN
31N47W TO 31N56W TO 29N57W TO 29N54W TO 30N53W TO 31N47W NE TO E
WINDS 20 TO 25 KT. SEAS 3.0 M IN N SWELL. WITHIN 26N62W TO 26N72W
TO 25N73W TO 25N68W TO 25N67W TO 25N65W TO 26N62W NE WINDS 20 TO
25 KT. SEAS 2.5 TO 3.0 M IN N TO NE SWELL. ELSEWHERE WITHIN
31N37W TO 31N62W TO 26N75W TO 20N68W TO 19N55W TO 25N38W TO
31N37W...INCLUDING IN ATLANTIC EXPOSURES AND PASSAGES...WINDS 20
KT OR LESS. SEAS 2.5 TO 3.5 M IN NW TO N SWELL.
.36 HOUR FORECAST LOW PRES NEAR 29N58W 1009 MB. WITHIN 31N57W TO
31N58W TO 30N59W TO 28N60W TO 30N58W TO 31N57W N TO NE WINDS 30
TO 40 KT. SEAS 3.5 TO 4.0 M. ELSEWHERE WITHIN 30N58W TO 31N57W TO
31N62W TO 29N61W TO 27N60W TO 27N59W TO 30N58W N TO NE WINDS 20
TO 30 KT. SEAS 2.5 TO 3.5 M. WITHIN 29N56W TO 31N57W TO 29N57W TO
28N58W TO 27N58W TO 28N57W TO 29N56W S TO SW WINDS 20 TO 30 KT.
SEAS 2.5 TO 3.0 M. ELSEWHERE WITHIN 31N62W TO 27N67W TO 27N74W TO
25N76W TO 24N73W TO 27N59W TO 31N62W WINDS 20 KT OR LESS. SEAS
2.5 TO 3.0 M IN E SWELL. REMAINDER OF AREA WITHIN 31N35W TO
30N58W TO 27N59W TO 25N56W TO 25N35W TO 31N35W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.5 M IN NW TO N SWELL.
.48 HOUR FORECAST LOW PRES NEAR 29.5N55W 1008 MB. WITHIN 31N56W
TO 31N57W TO 30N57W TO 29N57W TO 30N57W TO 31N56W N TO NE WINDS
30 TO 40 KT. SEAS 4.5 TO 5.0 M. ELSEWHERE WITHIN 30N56W TO 31N56W
TO 31N60W TO 28N60W TO 28N56W TO 30N56W N TO NE WINDS 20 TO 30
KT. SEAS 3.0 TO 4.5 M. WITHIN 29N53W TO 30N54W TO 29N55W TO
28N54W TO 29N54W TO 29N53W S TO SW WINDS 20 TO 25 KT. SEAS 3.0 TO
4.0 M IN N SWELL. REMAINDER OF AREA WITHIN 31N52W TO 28N59W TO
31N62W TO 28N64W TO 25N60W TO 28N53W TO 31N52W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.5 M IN MIXED SWELL. WITHIN 31N35W TO 31N52W
TO 25N52W TO 25N35W TO 31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.5 M IN NW TO N SWELL.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 23N35W TO 22N37W TO 19N40W TO 19N38W TO 13N38W TO
14N35W TO 23N35W E WINDS 20 TO 25 KT. SEAS 3.5 TO 4.0 M IN NE
SWELL. WITHIN 14N44W TO 15N46W TO 14N47W TO 12N46W TO 11N48W TO
10N46W TO 14N44W E WINDS 20 TO 25 KT. SEAS 3.0 TO 3.5 M IN NE TO
E SWELL. ELSEWHERE WITHIN 26N35W TO 20N53W TO 22N59W TO 08N58W
TO 12N46W TO 07N35W TO 26N35W...INCLUDING IN ATLANTIC EXPOSURES
AND PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN NE TO E
SWELL.
.24 HOUR FORECAST WITHIN 22N35W TO 23N37W TO 19N39W TO 19N47W TO
15N45W TO 13N35W TO 22N35W E WINDS 20 TO 25 KT. SEAS 3.0 TO 3.5
M IN NE TO E SWELL. ELSEWHERE WITHIN 25N35W TO 17N62W TO 07N57W
TO 07N35W TO 25N35W...INCLUDING IN ATLANTIC EXPOSURES AND
PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN MIXED NE AND
NW SWELL.
.48 HOUR FORECAST WITHIN 22N35W TO 22N42W TO 18N45W TO 14N40W TO
13N36W TO 17N38W TO 22N35W E WINDS 20 TO 25 KT. SEAS 3.5 M IN NE
TO E SWELL. WITHIN 09N35W TO 08N37W TO 09N37W TO 07N38W TO
07N35W TO 08N36W TO 09N35W E WINDS 20 TO 25 KT. SEAS 3.0 TO 3.5 M
IN N TO NE SWELL. ELSEWHERE WITHIN 25N35W TO 20N44W TO 25N52W TO
19N62W TO 07N57W TO 07N35W TO 25N35W...INCLUDING IN ATLANTIC
EXPOSURES AND PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M
IN NE TO E SWELL.
.CARIBBEAN 03 HOUR FORECAST WITHIN 12N74W TO 13N75W TO 12N76W TO
11N76W TO 11N75W TO 12N74W NE TO E WINDS 20 TO 25 KT. SEAS TO 2.5
M
IN NE TO E SWELL.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WITHIN 13N74W TO 12N75W TO 11N75W TO 12N73W TO
11N71W TO 11N70W TO 13N74W...INCLUDING THE GULF OF VENEZUELA...
NE TO E WINDS 20 TO 30 KT. SEAS LESS THAN 2.5 M.
.GULF OF AMERICA WITHIN 24N81W TO 24N82W TO 23N85W TO 23N86W TO
23N84W TO 24N81W...INCLUDING STRAITS OF FLORIDA...NE TO E WINDS
20 TO 25 KT. SEAS TO 3.0 M. ELSEWHERE WITHIN 24N82W TO 25N85W TO
24N86W TO 23N86W TO 23N84W TO 24N81W TO 24N82W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN E SWELL.
.18 HOUR FORECAST CONDITIONS IMPROVE. 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 STRIPLING. NATIONAL HURRICANE CENTER.
$$