HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC THU DEC 04 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 04.
24 HOUR FORECAST VALID 0000 UTC DEC 05.
48 HOUR FORECAST VALID 0000 UTC DEC 06.
.WARNINGS.
...HURRICANE FORCE WIND WARNING...
.LOW 46N53W 974 MB MOVING NE 35 KT. FROM 39N TO 50N BETWEEN 42W
AND 57W WINDS 40 TO 60 KT. SEAS 5 TO 10 M. ALSO FROM 35N TO 52N
BETWEEN 37W AND 61W WINDS 25 TO 40 KT. SEAS 4 TO 7 M. ELSEWHERE
WITHIN 540 NM NE...780 NM E AND SE...600 NM SW...AND 360 NM NW
QUADRANTS WINDS 20 TO 30 KT. SEAS 3 TO 6 M.
.06 HOUR FORECAST LOW 48N48W 974 MB. WITHIN 360 NM SW SEMICIRCLE
WINDS 50 TO 65 KT. SEAS 7 TO 11 M.
.24 HOUR FORECAST LOW MOVED E OF AREA 53N31W 963 MB. WITHIN 420
NM SW QUADRANT AREA OF W TO NW WINDS 40 TO 50 KT. SEAS 6 TO 10
M. ALSO...EXCEPT AS DESCRIBED WITH LOW 60N46W BELOW... WITHIN
600 NM SW AND 540 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 4 TO 8
M...HIGHEST SW QUADRANT. AND WITHIN 720 NM SW AND 660 NM NW
QUADRANTS WINDS 20 TO 30 KT. SEAS 3 TO 6 M...EXCEPT 4 TO 7 M SW
QUADRANT. ELSEWHERE WITHIN 1080 NM SW QUADRANT WINDS TO 25 KT.
SEAS 3 TO 6 M IN MIXED SWELL.
.48 HOUR FORECAST LOW MOVED WELL E OF AREA. CONDITIONS DESCRIBED
WITH LOW 49N50W BELOW.
...STORM WARNING...
.24 HOUR FORECAST NEW LOW 49N61W 994 MB AND RAPIDLY
INTENSIFYING. FROM 38N TO 50N BETWEEN 60W AND 72W WINDS 25 TO 40
KT. SEAS TO 4 M.
.36 HOUR FORECAST LOW 51N57W 979 MB. WITHIN 600 NM SE AND 360 NM
SW QUADRANTS WINDS 40 TO 50 KT. SEAS 4 TO 7 M.
.48 HOUR FORECAST LOW 49N50W 954 MB. FROM 41N TO 53N BETWEEN 38W
AND 61W AREA OF W TO NW WINDS 40 TO 60 KT. SEAS 6 TO 11 M. WINDS
AND SEAS HIGHEST FROM 43N TO 49N BETWEEN 41W AND 59W. ALSO
WITHIN 420 NM NE...900 NM SE...600 NM SW...540 NM W...AND 300 NM
NW QUADRANTS WINDS 25 TO 40 KT. SEAS 4 TO 8 M. AND WITHIN 480 NM
NE...1200 NM SE...660 NM SW...AND 360 NM NW QUADRANTS WINDS 20
TO 30 KT. SEAS 3 TO 6 M. ELSEWHERE WITHIN 840 SW QUADRANT WINDS
TO 25 KT. SEAS 3 TO 5 M IN W TO NW SWELL.
...STORM WARNING...
.LOW JUST E OF AREA 58N34W 980 MB MOVING W 05 KT AND WILL TURN
SW AFTER 12 HOURS. WITHIN 90 NM EITHER SIDE OF A LINE FROM
65N35W TO 61N41W TO 57N43W AREA OF N TO NE WINDS 40 TO 55 KT.
SEAS 5 TO 9 M. ALSO WITHIN 240 NM SW AND 480 NM NW QUADRANTS
WINDS 35 TO 45 KT. SEAS 4 TO 8 M...EXCEPT 6 TO 10 M SW QUADRANT.
AND WITHIN 300 NM SW AND 540 NM NW QUADRANTS WINDS 25 TO 35 KT.
SEAS 3 TO 6 M...EXCEPT 4 TO 8 M SW QUADRANT. ELSEWHERE WITHIN
480 NM SW QUADRANT WINDS TO 25 KT. SEAS 4 TO 6 M IN NW SWELL.
.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED WITH LOWS
53N31W ABOVE AND 60N46W BELOW.
...STORM WARNING...
.24 HOUR FORECAST NEW LOW 60N46W 999 MB. WITHIN 180 NM NE AND
120 NM SE QUADRANTS AREA OF NE WINDS 40 TO 60 KT. SEAS 5 TO 8 M.
ELSEWHERE E OF A LINE FROM 58N49W TO 66N35W WINDS 30 TO 45 KT.
SEAS 3 TO 6 M.
.48 HOUR FORECAST LOW DISSIPATED WITH NEW LOW 56N52W 988 MB.
WITHIN 480 NM NE QUADRANT AREA OF N TO NE WINDS 40 TO 55 KT.
SEAS 6 TO 9 M. ALSO WITHIN 720 NM NE...360 NM E...AND 180 NM N
QUADRANTS WINDS 30 TO 45 KT. SEAS 4 TO 7 M.
...GALE WARNING...
.LOW JUST NW OF AREA 67N62W 994 MB MOVING NW 15 KT. WITHIN 240
NM SE QUADRANT AREA OF S TO SW WINDS 25 TO 35 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW MOVED WELL NW OF AREA WITH NEW LOW 61N62W
994 MB. N OF 62N BETWEEN 57W AND 61W AREA OF SE TO S WINDS 20 TO
30 KT. SEAS TO 4 M.
.48 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED WITH LOW
58N57W BELOW.
...GALE WARNING...
.48 HOUR FORECAST NEW LOW 58N57W 988 MB. EXCEPT AS DESCRIBED
WITH LOW 56N52W ABOVE...WITHIN 300 NM NW...AND 180 NM NE AND SW
QUADRANTS WINDS 30 TO 45 KT. SEAS 3 TO 6 M.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY N OF 64N W OF 59W. ELSEWHERE
LIGHT TO MODERATE FREEZING SPRAY IN THE GULF OF SAINT LAWRENCE W
AND NW OF A LINE FROM 47N64W TO 49N61W...N OF 50N W OF 51W...AND
N OF A LINE FROM 64N40W TO 65N35W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY WITHIN 90 NM
OF 49N68W IN THE GULF OF SAINT LAWRENCE. ELSEWHERE LIGHT TO
MODERATE FREEZING SPRAY N OF A LINE FROM 61N50W TO 65N63W...W OF
A LINE FROM 52N51W TO 56N51W TO 64N64W...WITHIN 90 NM OF
50N54W...WITHIN 90 NM N OF A LINE FROM 42N71W TO 45N65W...AND N
OF A LINE FROM 62N42W TO 65N35W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY BETWEEN THE
GREENLAND COAST AND A LINE FROM 61N42W TO 64N39W TO
66N35W...BETWEEN THE GREENLAND COAST AND A LINE FROM 61N48W TO
64N54W TO 67N55W...N OF 55N W OF 60W...AND FROM 42N TO 51N
BETWEEN 57W AND 71W INCLUDING THE GULF OF SAINT LAWRENCE.
.SYNOPSIS AND FORECAST.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 52N
BETWEEN 41W AND 58W...WITHIN 180 NM W OF A LINE FROM 56N40W TO
64N36W...N OF 64N E OF GREENLAND...AND BETWEEN THE GREENLAND
COAST AND A LINE FROM 62N51W TO 67N56W.
.24 HOUR FORECAST DENSE FOG WITHIN 90 NM OF 53N36W AND
63N52W...FROM 55N TO 62N BETWEEN 41W AND 52W...FROM 57N TO 63N W
OF 58W...AND WITHIN AN AREA BOUNDED BY A LINE FROM 43N68W TO
50N63W TO 51N58W TO 47N56W TO 43N68W.
.48 HOUR FORECAST DENSE FOG FROM 38N TO 40N W OF 71W...FROM 46N
TO 55N BETWEEN 42W AND 59W...WITHIN AN AREA BOUNDED BY A LINE
FROM 57N45W TO 64N40W TO 64N36W TO 57N40W TO 57N45W...AND FROM
56N TO 66N BETWEEN 54W AND 63W.
.FORECASTER FIGURSKEY. OCEAN PREDICTION CENTER.
NATIONAL HURRICANE CENTER MIAMI FL
ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF AMERICA
SYNOPSIS VALID 0000 UTC THU DEC 4.
24 HOUR FORECAST VALID 0000 UTC FRI DEC 5.
48 HOUR FORECAST VALID 0000 UTC SAT DEC 6.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 14N39W TO 17N43W TO 16N53W TO 11N51W TO 11N39W TO
14N39W NE TO E WINDS 20 TO 25 KT. SEAS 3 TO 3.5 M. ELSEWHERE
WITHIN 31N35W TO 24N47W TO 31N60W TO 18N62W TO 08N56W TO 08N35W
TO
31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN NE TO E SWELL.
.24 HOUR FORECAST WITHIN 27N35W TO 19N63W TO 09N59W TO 07N51W TO
09N35W TO 27N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN NE TO E
SWELL.
.48 HOUR FORECAST WITHIN 20N35W TO 20N42W TO 17N50W TO 18N62W TO
08N58W TO 10N35W TO 20N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M
IN NE TO E SWELL.
.ATLC 30 HOUR FORECAST COLD FRONT FROM 31N57W TO 25N66W. WITHIN
31N45W TO 31N55W TO 30N54W TO 29N53W TO 30N50W TO 30N47W TO
31N45W WINDS 20 KT OR LESS. SEAS TO 2.5 M IN NW SWELL.
.48 HOUR FORECAST COLD FRONT FROM 31N49W TO 25N61W. WITHIN
30.5N35W TO 31N57.5W TO 30.5N57.5W TO 30N48.5W TO 30N35W TO
30.5N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN NW SWELL.
.ATLC 42 HOUR FORECAST WITHIN 31N75.5W TO 31N80W TO 30.5N80W TO
30N78.5W TO 30.5N76W TO 31N75.5W SW WINDS 20 TO 25 KT. SEAS TO
2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.
.GULF OF AMERICA 30 HOUR FORECAST COLD FRONT FROM 31N88W TO
22N98W. WITHIN 26N95W TO 27N96W TO 27N97W TO 26N97W TO 22N98W TO
22N97W TO 26N95W N WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.42 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 DELGADO. NATIONAL HURRICANE CENTER.