HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC MON OCT 20 2025
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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC OCT 20.
24 HOUR FORECAST VALID 1200 UTC OCT 21.
48 HOUR FORECAST VALID 1200 UTC OCT 22.
.WARNINGS.
...STORM WARNING...
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 63N35W 994 MB.
WITHIN 240 NM SE SEMICIRCLE AND BETWEEN GREENLAND COAST AND A
LINE FROM 66N62W TO 57N50W WINDS 25 TO 40 KT. SEAS TO 3.5 M.
.36 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 65N60W 995 MB.
BETWEEN GREENLAND COAST AND A LINE FROM 66N57W TO 60N51W WINDS 40
TO 50 KT. SEAS 3.5 TO 5 M.
.48 HOUR FORECAST COMBINED LOW 65N55W 1005 MB. BETWEEN 120 NM AND
300 NM W QUADRANT AND BETWEEN GREENLAND COAST AND A FRONT FROM
67N58W TO LOW CENTER WINDS 25 TO 35 KT. SEAS TO 4 M. ELSEWHERE N
OF 59N W OF 48W WINDS 20 TO 30 KT. SEAS TO 3 M.
...GALE WARNING...
.COMPLEX LOW WITH FIRST CENTER 42N43W 993 MB MOVING E 20 KT AND
SECOND CENTER 47N33W 997 MB MOVING E 30 KT. WITHIN 360 NM N
QUADRANT AND 360 NM SW SEMICIRCE OF FIRST CENTER AND 240 NM NW
QUADRANT OF SECOND CENTER WINDS 25 TO 40 KT. SEAS 3 TO 5 M.
ELSEWHERE S OF 53N E OF 60W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5
M.
.24 HOUR FORECAST LOW E OF AREA 44N33W 998 MB WITH SECOND CENTER
WELL E OF AREA. WITHIN 360 NM W SEMICIRCLE WINDS 25 TO 35 KT.
SEAS 3.5 TO 5 M. ELSEWHERE S OF 51N E OF 53W WINDS 20 TO 30 KT.
SEAS TO 4 M.
.48 HOUR FORECAST LOW DISSIPATED WITH NEW LOW TO FORM NEAR 39N37W
1007 MB. WITHIN 360 NM NW SEMICIRCLE WINDS 25 TO 40 KT. SEAS 2.5
TO 4.5 M. ELSEWHERE S OF 46N E OF 48W WINDS 20 TO 30 KT. SEAS TO
3.5 M.
...GALE WARNING...
.INLAND LOW NEAR 45N75W 1000 MB MOVING N 05 KT. FROM 31N TO 44 N
W OF 68W WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST COMPLEX LOW INLAND WITH MAIN CENTER 47N75W 1004
MB. FROM 37N TO 47N W OF 60W WINDS 20 TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW DISSIPATED. WITHIN 120 NM E OF A LINE FROM
42N57W TO 39N56W WINDS TO 25 KT. SEAS TO 2.5 M.
.SYNOPSIS AND FORECAST.
.24 HOUR FORECAST LOW WELL E OF AREA. N OF 59N E OF 38W WINDS TO
25 KT. SEAS TO 4 M.
.48 HOUR FORECAST LOW WELL E OF AREA. FROM 50N TO 63N E OF 43W
WINDS LESS THAN 25 KT. SEAS TO 4 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 63N TO 65N W OF
63W.
.24 HOUR FORECAST DENSE FOG WITHIN 180 NM NE OF A LINE 64N64W TO
59N45W AND FROM 61N TO 64N W OF 63W.
.48 HOUR FORECAST DENSE FOG BETWEEN GREENLAND COAST AND A LINE
FROM 67N58W TO 61N52W AND FROM 55N TO 64N BETWEEN 37W AND 43W.
.FORECASTER JOSEPH. 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 1200 UTC MON OCT 20.
24 HOUR FORECAST VALID 1200 UTC TUE OCT 21.
48 HOUR FORECAST VALID 1200 UTC WED OCT 22.
.WARNINGS.
...CARIBBEAN SEA GALE WARNING...
.CARIBBEAN WITHIN 15N65W TO 16N65W TO 15N66W TO 14N65W TO 14N64W
TO 15N65W SE WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M IN E SWELL.
ELSEWHERE WITHIN 16N64W TO 17N66W TO 16N67W TO 14N65W TO 14N62W
TO 16N64W E TO SE WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M IN E
SWELL. IN THE REMAINING AREA WITHIN 18N63W TO 17N65W TO 18N68W
TO 18N69W TO 15N68W TO 14N63W TO 18N63W...INCLUDING MONA
PASSAGE...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N SWELL.
.18 HOUR FORECAST WITHIN 16N66W TO 16N68W TO 17N69W TO 17N71W TO
15N71W TO 14N67W TO 16N66W E WINDS 20 TO 25 KT. SEAS 2.5 TO 4.5
M IN E SWELL. ELSEWHERE WITHIN 18N67W TO 19N68W TO 18N70W TO
17N68W TO 16N68W TO 16N66W TO 18N67W...INCLUDING MONA PASSAGE...
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN E SWELL.
.24 HOUR FORECAST WITHIN 18N72W TO 17N73W TO 15N73W TO 15N71W TO
14N69W TO 15N67W TO 18N72W E WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0
M. ELSEWHERE WITHIN 18N68W TO 18N71W TO 17N70W TO 16N69W TO
15N68W TO 15N67W TO 18N68W...INCLUDING IN MONA PASSAGE...WINDS 20
KT OR LESS. SEAS 2.5 TO 3.0 M IN E SWELL.
.48 HOUR FORECAST WITHIN 18N67W TO 17N70W TO 18N74W TO 15N75W TO
14N72W TO 15N67W TO 18N67W E TO SE WINDS 20 TO 30 KT. SEAS 2.5
TO 3.0 M. ELSEWHERE WITHIN 18N74W TO 16N77W TO 15N77W TO 14N75W
TO 15N74W TO 16N75W TO 18N74W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN E SWELL.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 31N37W TO 31N60W TO 20N64W TO 13N60W TO 10N51W TO
31N37W...INCLUDING PASSAGES NEAR LEEWARD ISLANDS...WINDS 20 KT
OR LESS. SEAS 2.5 TO 4.5 M IN NW TO N SWELL.
.24 HOUR FORECAST WITHIN 31N39W TO 31N44W TO 30N43W TO 30N42W TO
30N40W TO 31N39W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN W TO
NW SWELL. ALSO WITHIN 17N52W TO 19N54W TO 19N63W TO 10N57W TO
13N56W TO 17N52W...INCLUDING PASSAGES NEAR LEEWARD ISLANDS...
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N SWELL.
.48 HOUR FORECAST WITHIN 31N42W TO 31N51W TO 30N48W TO 30N46W TO
31N42W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N SWELL.
.CARIBBEAN WITHIN 12N75W TO 12N76W TO 11N76W TO 11N75W TO 12N75W
E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M IN NE TO E SWELL.
.06 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 CHAN. NATIONAL HURRICANE CENTER.
$$