High seas forecast issued with gale warnings for North Atlantic region.

FZNT01 KWBC 180400
HSFAT1 0430

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC WED DEC 18 2024

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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
[email protected](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 18.
24 HOUR FORECAST VALID 0000 UTC DEC 19.
48 HOUR FORECAST VALID 0000 UTC DEC 20.

.WARNINGS.

…GALE WARNING…
.LOW INLAND 56N64W 995 MB MOVING NE 30 KT. WITHIN 120 NM NE AND E
OF A LINE FROM 50N60W TO 47N60W…INCLUDING THE E GULF OF SAINT
LAWRENCE…WITHIN 180 NM E AND SE OF LINE FROM 47N60W TO 43N64W
WINDS 25 TO 35 KT. SEAS 8 TO 12 FT…HIGHEST NEAR 49N60W.
ELSEWHERE WITHIN 600 NM SW AND W OF A LINE FROM 37N60W TO 40N57W
AND W AND NW OF A LINE FROM 40N58W TO 47N50W TO 50N50W WINDS 20
TO 30 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW DISSIPATED. WITHIN 180 NM E AND SE OF A
FRONT FROM 50N42W TO 44N48W AREA OF SW WINDS 30 TO 40 KT. SEAS 9
TO 18 FT…HIGHEST NEAR 50N42W. ELSEWHERE FROM 48N TO 50N E OF
50W…WITHIN 360 NM E AND SE OF A LINE FROM 48N45W TO 42N51W AND
WITHIN 180 NM SE AND S OF LINE FROM 42N51W TO 39N60W TO 37N75W
AREA OF SW TO W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST NEW LOW 50N53W 995 MB. WITHIN 360 NM SE AND 780
NM SW QUADRANTS WINDS 30 TO 40 KT. SEAS 10 TO 18 FT…HIGHEST SW
QUADRANT. ELSEWHERE WITHIN 660 NM E…540 NM SE…840 NM SW AND
480 NM W QUADRANTS…INCLUDING THE GULF OF SAINT LAWRENCE WINDS
25 TO 35 KT. SEAS 8 TO 14 FT IN MIXED SWELL…EXCEPT SEAS TO 8 FT
IN THE GULF OF SAINT LAWRENCE.

…GALE WARNING…
.COMPLEX LOW WITH MAIN LOW 60N58W 993 MB MOVING NE 20 KT. FROM
50N TO 60N BETWEEN 45W AND 60W AND N OF 60N BETWEEN 48W AND 60W
WINDS 25 TO 35 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST LOW DISSIPATED INLAND. CONDITIONS DESCRIBED
BELOW WITH LOW 61N40W.

…GALE WARNING…
.24 HOUR FORECAST NEW LOW 61N40W 992 MB. WITHIN 60 NM W
SEMICIRCLE…WITHIN AN AREA BOUNDED BY A LINE FROM 50N42W TO
50N38W TO 53N35W TO 58N35W TO 50N42W AND WITHIN 90 NM N AND NE OF
A LINE FROM 66N55W TO 64N54W WINDS 30 TO 40 KT. SEAS 10 TO 18
FT…HIGHEST NEAR 52N42W. ELSEWHERE FROM 50N TO 60N E OF 50W…N
OF 60N E OF GREENLAND AND N OF 60N E OF 60W TO GREENLAND WINDS 25
TO 35 KT. SEAS 8 TO 14 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW NE OF THE AREA 65N32W 980 MB. FROM 59N TO
61N E OF 43W AND FROM 50N TO 52N E OF 53W WINDS 30 TO 45 KT. SEAS
10 TO 20 FT…HIGHEST NEAR 61N38W. ELSEWHERE FROM 52N TO 55N E OF
50W…FROM 55N TO 60N E OF 45W…FROM 61N TO 63N E OF GREENLAND
AND N OF 64N E OF GREENLAND WINDS 20 TO 30 KT. SEAS 8 TO 15 FT IN
MIXED SWELL.

…GALE WARNING…
.36 HOUR FORECAST NEW LOW 44N64W 1005 MB. WITHIN 480 NM SE…600
NM S AND 720 NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED ABOVE
WITH LOW 50N53W.

…GALE WARNING…
.36 HOUR FORECAST NEW LOW 32N39W 1021 MB. FROM 32N TO 34N BETWEEN
35W AND 40W WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW 32N42W 1012 MB. WITHIN 300 NM NW SEMICIRCLE
AND WITHIN 360 NM N AND NE QUADRANTS WINDS 25 TO 40 KT. SEAS 9 TO
20 FT…HIGHEST NEAR 33N42W.

…HEAVY FREEZING SPRAY WARNING…
.MODERATE TO HEAVY FREEZING SPRAY NW AND N OF A LINE FROM 61N64W
TO 66N54W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY FROM 57N TO
60N W OF 59W TO LABRADOR…N OF 60N W OF GREENLAND AND N OF 62N E
OF GREENLAND.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY NW AND N OF A
LINE FROM 61N63W TO 65N53W. ELSEWHERE LIGHT TO MODERATE FREEZING
SPRAY FROM 55N TO 60N W OF 53W TO LABRADOR AND N OF 60N W OF
GREENLAND.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF A LINE
FROM 60N61W TO 64N60W AND N OF 65N W OF GREENLAND. ELSEWHERE
LIGHT TO MODERATE FREEZING SPRAY FROM 53N TO 60N W OF 54W TO
LABRADOR AND N OF 60N W OF GREENLAND.

.SYNOPSIS AND FORECAST.

.LOW E OF AREA 42N27W 1002 MB MOVING NE 30 KT. FROM 38N TO 46N E
OF 40W WINDS 20 TO 30 KT. SEAS 8 TO 16 FT IN N AND NE SWELL.
.24 HOUR FORECAST LOW WELL E OF AREA AND CONDITIONS DIMINISHED.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 90 NM NW OF A
LINE FROM 45N61W TO 42N65W…FROM 55N TO 60N W OF 47W TO
LABRADOR…FROM 60N TO 64N W OF GREENLAND AND N OF 64N E OF 57W
TO GREENLAND.
.24 HOUR FORECAST DENSE FOG WITHIN 90 NM N AND NE OF A LINE FROM
58N44W TO 61N52W TO W GREENLAND AND N OF 61N E OF GREENLAND.
.48 HOUR FORECAST DENSE FOG FROM 45N TO 50N BETWEEN 45W AND
59W…INCLUDING THE E GULF OF SAINT LAWRENCE…FROM 50N TO 58N W
OF 40W TO LABRADOR AND FROM 60N TO 63N BETWEEN 52W AND 59W.

.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 MEXICO

SYNOPSIS VALID 0000 UTC WED DEC 18.
24 HOUR FORECAST VALID 0000 UTC THU DEC 19.
48 HOUR FORECAST VALID 0000 UTC FRI DEC 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 24N69W TO 26N72W TO 24N73W TO 22N74W TO 21N71W TO
20N68W TO 24N69W…INCLUDING ATLANTIC EXPOSURES…E WINDS 20 TO
25 KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN 22N72W TO 23N74W TO
22N74W TO 22N73W TO 22N72W TO 21N71W TO 22N72W E WINDS 20 TO 25
KT. SEAS LESS THAN 8 FT. REMAINDER OF AREA WITHIN 25N63W TO
29N68W TO 30N78W TO 28N80W TO 20N72W TO 18N60W TO 25N63W WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN NE TO E SWELL.
.24 HOUR FORECAST WITHIN 20.5N72.5W TO 20.5N73.5W TO 20.5N74W TO
20N74W TO 20N73.5W TO 20.5N72.5W E WINDS 20 TO 25 KT. SEAS 8 FT.
ELSEWHERE WITHIN 25N69W TO 28N77W TO 24N75W TO 22N72W TO 18N68W
TO 19N65W TO 25N69W…INCLUDING ATLANTIC EXPOSURES…WINDS 20 KT
OR LESS. SEAS 8 TO 10 FT IN NE TO E SWELL.
.36 HOUR FORECAST CONDITIONS MERGED WITH AREA DESCRIBED BELOW.

.ATLC COLD FRONT FROM 31N30W TO 25N56W. TROUGH FROM 26N63W TO
31N66W. WITHIN 30N64W TO 29N64W TO 26N60W TO 25N58W TO 24N51W
TO 30N64W E WINDS 20 TO 25 KT. SEAS 10 TO 12 FT. ELSEWHERE WITHIN
31N35W TO 31N65W TO 29N68W TO 19N61W TO 19N49W TO
31N35W…INCLUDING IN ATLANTIC EXPOSURES AND PASSAGES…WINDS 20
KT OR LESS. SEAS 8 TO 12 FT IN NE TO E SWELL.
.24 HOUR FORECAST COLD FRONT FROM 24N45W TO 21N57W TO 27N67W.
WITHIN 24N48W TO 27N51W TO 23N58W TO 26N64W TO 25N66W TO 19N64W
TO 24N48W…INCLUDING IN ATLANTIC EXPOSURES AND PASSAGES…NE TO
E WINDS 20 TO 25 KT. SEAS 10 TO 12 FT. ELSEWHERE WITHIN 21N49W TO
31N47W TO 25N69W TO 11N58W TO 06N50W TO 13N47W TO
21N49W…INCLUDING IN ATLANTIC EXPOSURES AND PASSAGES…WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN NE TO E SWELL.
.48 HOUR FORECAST COLD FRONT DISSI