North Atlantic High Seas Forecast

FZNT01 KWBC 310934
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC SAT MAY 31 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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).

MARINERS SHOULD NOTE THAT FORECASTS FOR SEAS ARE IN UNITS OF
METERS.

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 0600 UTC MAY 31. 
24 HOUR FORECAST VALID 0600 UTC JUN 01.
48 HOUR FORECAST VALID 0600 UTC JUN 02.

.WARNINGS.

...GALE WARNING...
.COMPLEX LOW WITH FIRST CENTER 48N56W 1000 MB AND SECOND CENTER
41N58W 1006 MB. WITHIN 240 NM SE QUADRANT OF SECOND CENTER WINDS
25 TO 35 KT. SEAS TO 4 M. ELSEWHERE WITHIN 300 NM SE OF A FRONT
FROM 48N49W TO SECOND CENTER TO 38N70W WINDS 20 TO 30 KT. SEAS TO
3.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 52N37W 1014 MB
AND SECOND CENTER 50N45W 1014 MB. WITHIN 300 NM SE OF A FRONT
FROM FIRST CENTER TO SECOND CENTER TO 44N50W WINDS 20 TO 30 KT.
SEAS TO 3.5 M IN MIXED SWELL.
.48 HOUR FORECAST COMBINED LOW AND CONDITIONS E OF AREA.

...GALE WARNING...
.LOW 40N75W 989 MB. WITHIN 540 NM SE AND S QUADRANTS WINDS 25 TO
35 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW INLAND 47N70W 980 MB. WITHIN 600 NM E AND
900 NM SE QUADRANTS...INCLUDING WITHIN THE GULF OF SAINT
LAWRENCE...WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M...EXCEPT SEAS TO
3 M WITHIN THE GULF OF SAINT LAWRENCE. ELSEWHERE S OF 51N W OF
52W WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER INLAND 52N67W 995
MB AND SECOND CENTER NEAR 55N56W 1003 MB. WITHIN 240 NM N
QUADRANT OF SECOND CENTER...AND WITHIN 300 NM SE OF A FRONT FROM
SECOND CENTER TO 43N70W...WITHIN 240 NM EITHER SIDE OF A LINE
FROM 52N40W TO 48N50W TO 34N62W...AND WITHIN THE GULF OF SAINT
LAWRENCE WINDS 20 TO 30 KT. SEAS TO 3.5 M.

.SYNOPSIS AND FORECAST.

.FROM 43N TO 53N E OF 38W AREA OF NE TO E WINDS TO 25 KT. SEAS TO
2.5 M.
.12 HOUR FORECAST CONDITIONS E OF AREA.

.LOW 55N54W 1000 MB MOVING NE 20 KT. WITHIN 300 NM NE SEMICIRCLE
WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 61N41W 1001 MB. FROM 57N TO 61N E OF 54W
WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LOW E OF AREA NEAR 60N22W 990 MB. FROM 55N TO
61N E OF 38W WINDS 20 TO 30 KT. SEAS TO 3 M.

.LOW 31N45W 1018 MB NEARLY STATIONARY. WITHIN 180 NM N SEMICIRCLE
WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 31N46W 1022 MB. WITHIN 240 NM NE QUADRANT
WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 540 NM N AND
W OF A LINE FROM 39N72W TO 42N50W TO 48N43W...AND WITHIN 240 NM
NW OF A LINE FROM 56N56W TO 60N48W.
.24 HOUR FORECAST DENSE FOG FROM 43N TO 52N BETWEEN 42W AND
69W...INCLUDING WITHIN THE GULF OF SAINT LAWRENCE...AND FROM 59N
TO 62N BETWEEN 39W AND 54W.
.48 HOUR FORECAST DENSE FOG WITHIN AN AREA BOUNDED BY A LINE FROM
43N58W TO 43N50W TO 47N35W TO 53N35W TO 59N60W TO 43N58W.

.FORECASTER ANDERSON. 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 0600 UTC SAT MAY 31.
24 HOUR FORECAST VALID 0600 UTC SUN JUN  1.
48 HOUR FORECAST VALID 0600 UTC MON JUN  2.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 31N70W TO 31N78W TO 29N77W TO 29N74W TO 30N72W TO
31N70W SW WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 31N66W TO 31N72W TO 29N71W TO 29N68W TO
30N66W TO 31N66W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN W 
SWELL.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 2.5 M.

.ATLC 24 HOUR FORECAST WITHIN 11N51W TO 11N55W TO 09N55W TO
08N53W TO 07N49W TO 08N48W TO 11N51W WINDS 20 KT OR LESS. SEAS
2.5 TO 3.0 M IN NE SWELL.
.48 HOUR FORECAST WITHIN 13N57W TO 13N61W TO 09N58W TO 07N53W TO
08N50W TO 09N50W TO 13N57W...INCLUDING ATLANTIC EXPOSURES...
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NE SWELL.

.CARIBBEAN WITHIN 15N72W TO 15N76W TO 13N77W TO 12N76W TO 12N71W
TO 15N72W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 14N68W TO 15N71W TO 15N74W TO 13N74W TO
11N70W TO 12N67W TO 14N68W...INCLUDING THE GULF OF VENEZUELA...
E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST WITHIN 14N67W TO 16N70W TO 17N77W TO 13N77W TO
11N67W TO 14N67W...INCLUDING IN MONA PASSAGE AND THE GULF OF
VENEZUELA... E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.FORECASTER AL. NATIONAL HURRICANE CENTER.

$$