HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC SUN OCT 18 2026
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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).
FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).
SECURITE
NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W
ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS
SYNOPSIS VALID 1800 UTC OCT 18.
24 HOUR FORECAST VALID 1800 UTC OCT 19.
48 HOUR FORECAST VALID 1800 UTC OCT 20.
.WARNINGS.
...STORM WARNING...
.COMPLEX LOW WITH MAIN LOW 65N38W DRIFTING SE AND SECOND LOW NE
OF THE AREA 66N29W 972 MB MOVING SW 10 KT. WITHIN 90 NM N OF A
LINE FROM 60N35W TO 59N42W TO 59N46W WINDS 40 TO 55 KT. SEAS 5 TO
8.5 M...HIGHEST NEAR 61N35W. ELSEWHERE FROM 55N TO 60N E OF 50W
AND FROM 62N TO 65N E OF GREENLAND WINDS 25 TO 40 KT. SEAS 4 TO 6
M. ALSO FROM 55N TO 65N W OF 50W WINDS TO 25 KT. SEAS 2.5 TO 4 M
IN MIXED SWELL.
.24 HOUR FORECAST COMBINED LOW 64N36W 979 MB. WITHIN 420 NM N OF
A LINE FROM 54N35W TO 54N48W WINDS 35 TO 50 KT. SEAS 5 TO 8.5 M.
ELSEWHERE FROM 50N TO 54N W OF 35W AND N OF 60N E OF GREENLAND
WINDS 25 TO 35 KT. SEAS 3 TO 6 M. ALSO FROM 54N TO 60N W OF 50W
AND FROM 60N TO 62N W OF GREENLAND WINDS TO 25 KT. SEAS 2.5 TO
4.5 M IN MIXED SWELL.
.48 HOUR FORECAST LOW JUST E OF THE AREA 64N34W 989 MB. FROM 48N
TO 56N BETWEEN 35W AND 53W AND N OF 65N E OF GREENLAND WINDS 25
TO 35 KT. SEAS 3 TO 6 M...HIGHEST NEAR 53N35W. ELSEWHERE FROM 56N
TO 60N W OF 45W AND FROM 60N TO 65N W OF GREENLAND WINDS 20 TO 30
KT. SEAS 2.5 TO 4.5 M IN MIXED SWELL.
...STORM WARNING...
.LOW 32N71W 1010 MB DRIFTING NW. WITHIN 300 NM W AND NW OF A LINE
FROM 31N72W TO THE LOW TO 37N61W WINDS 35 TO 50 KT. SEAS 4.5 TO 7
M. ELSEWHERE WITHIN 480 NM SW...NW AND 960 NM NE QUADRANTS WINDS
25 TO 35 KT. SEAS 3 TO 5.5 M.
.24 HOUR FORECAST LOW 33N72W 1006 MB. WITHIN 180 NM W AND NW OF A
LINE FROM 32N73W TO 40N67W WINDS 30 TO 45 KT. SEAS 4 TO 7 M.
ELSEWHERE WITHIN 720 NM NE...360 NM W AND NW QUADRANTS WINDS 25
TO 35 KT. SEAS 3 TO 5.5 M.
.48 HOUR FORECAST LOW 35N71W 1005 MB. WITHIN 180 NM W AND NW OF A
LINE FROM 34N74W TO 40N67W WINDS 30 TO 40 KT. SEAS 3.5 TO 6 M.
ELSEWHERE WITHIN 720 NM NE...300 NM SW AND 360 NM NW QUADRANTS
WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M IN MIXED SWELL.
...GALE WARNING...
.LOW 50N40W 1012 MOVING NE 40 KT. WITHIN AN AREA BOUNDED BY A
LINE FROM 50N35W TO THE LOW TO 45N44W TO 48N35W TO 50N35W AND
FROM 47N TO 51N W OF 58W IN THE GULF OF SAINT LAWRENCE WINDS 25
TO 35 KT. SEAS 3.5 TO 6 M...EXCEPT TO 3.5 M IN THE GULF OF SAINT
LAWRENCE.
.24 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED ABOVE
WITH LOW 64N36W.
...GALE WARNING...
.24 HOUR FORECAST INLAND LOW 58N69W 999 MB. WITHIN THE GULF OF
SAINT LAWRENCE WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED ABOVE
WITH LOW JUST E OF THE AREA 64N34W.
.SYNOPSIS AND FORECAST.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 55N TO 57N W OF
47W TO THE COAST OF LABRADOR AND N OF 65N E OF GREENLAND.
.24 HOUR FORECAST DENSE FOG W AND NW OF A LINE FROM 55N52W TO
60N58W TO THE COAST OF LABRADOR...N OF 64 E OF GREENLAND AND N OF
65N W OF GREENLAND.
.48 HOUR FORECAST DENSE FOG WITHIN 180 NM NW OF A LINE FROM
39N63W TO 45N49W...WITHIN 90 NM N OF A LINE FROM 55N48W TO
57N39W...N OF 64N E OF GREENLAND AND N OF 62N W OF GREENLAND.
.LIGHT FREEZING SPRAY N OF 60N W OF 56W.
.24 HOUR FORECAST LIGHT FREEZING SPRAY NW AND N OF A LINE FROM
60N60W TO 65N53W.
.48 HOUR FORECAST LIGHT FREEZING SPRAY N OF 60N W OF 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 1800 UTC SUN OCT 18.
24 HOUR FORECAST VALID 1800 UTC MON OCT 19.
48 HOUR FORECAST VALID 1800 UTC TUE OCT 20.
.WARNINGS.
...ATLC GALE WARNING...
.COLD FRONT FROM 31N71W TO 24N80W. N OF 30N W OF THE FRONT TO 75W
N WINDS 30 TO 35 KT. SEAS 6.0 TO 7.0 M. ELSEWHERE W OF FRONT N TO
NE WINDS 20 TO 30 KT. SEAS 4.0 TO 6.0 M N OF 29N W OF FRONT TO
80W AND 2.5 TO 4.0 M ELSEWHERE OUTSIDE OF THE BAHAMAS. .12
HOUR FORECAST COLD FRONT FROM 31N70W TO 24N80W. N OF 25N W OF
FRONT N TO NE WINDS 20 TO 30 KT. SEAS 4.0 M TO 6.5 M N OF 26N W
OF FRONT TO 80W AND 2.5 TO 4.0 M ELSEWHERE OUTSIDE OF THE
BAHAMAS. HIGHEST SEAS N OF 30N W OF FRONT TO 74W.
.24 HOUR FORECAST COLD FRONT FROM 31N68W TO 23N80W. W OF FRONT NW
TO N WINDS 20 TO 25 KT. SEAS 4.0 TO 5.0 M IN NW SWELL N OF 26N W
OF FRONT TO 80W AND OUTSIDE OF THE BAHAMAS AND 2.5 TO 4.0
ELSEWHERE. N OF 30N E OF FRONT TO 68W SW WINDS 20 TO 30 KT. SEAS
3.0 TO 4.0 FT. REMAINDER OF THE AREA N OF 23N AND W OF A LINE
FROM 31N65W TO 23N70W AND E OF THE BAHAMAS WINDS 20 KT OR LESS.
SEAS 2.5 TO 4.0 M IN NW SWELL.
.48 HOUR FORECAST WEAKENING STATIONARY FRONT FROM 31N67W TO
23N79W. W OF FRONT WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN NW
SWELL OUTSIDE THE BAHAMAS.
...GULF OF AMERICA GALE WARNING...
.STATIONARY FRONT FROM 24N80W TO 23N86W TO 18.5N93W. S OF 21N W
OF FRONT NW TO N WINDS 30 TO 40 KT. SEAS 4.0 TO 6.0 M. ELSEWHERE
NWOF FRONT TO A LINE FROM 29N90W TO 26N97W...INCLUDING THE
STRAITS OF FLORIDA...N TO NE WINDS 20 TO 30 KT. SEAS 2.5 TO 4.0
M.
.24 HOUR FORECAST WEAKENING STATIONARY FRONT FROM 23N80W TO
22N90W TO 19N93W. S OF 21N W OF FRONT NW TO N WINDS 20 TO 30 KT.
SEAS 2.5 TO 3.5 M. N OF FRONT E OF 91W...INCLUDING THE STRAITS
OF FLORIDA...NE TO E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.48 HOUR FORECAST FRONT SE OF AREA. S OF 21N W OF 95W NW TO N
WINDS 20 TO 25 KT. SEAS TO 2.5 M. FROM 22N TO 28N E OF
93W...INCLUDING THE STRAITS OF FLORIDA...NE TO E WINDS 20 TO 25
KT. SEAS 2.5 TO 3.0 M.
.SYNOPSIS AND FORECAST.
.ATLC FROM 25N TO 28N BETWEEN 38W AND 42W E TO SE WINDS 20 TO 25
KT. SEAS 2.5 TO 3.0 M. ELSEWHERE N OF 25N BETWEEN 39W AND 50W
WINDS
20 KT OR LESS. SEAS 2.5 TO 3.0 M PRIMARILY IN N SWELL.
.24 HOUR FORECAST N OF 27N BETWEEN 45W AND 50W E WINDS 20 TO 25
KT. SEAS 2.5 TO 3.0 M.
.36 HOUR FORECAST N OF 28N BETWEEN 45W AND 53W E TO SE WINDS 20
TO 25 KT. 2.5 TO 3.0 M.
.48 HOUR FORECAST N OF 29N BETWEEN 46W AND 55W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M PRIMARILY IN MIXED E AND N SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.FORECASTER GR. NATIONAL HURRICANE CENTER.
$$