North Atlantic High Seas Forecast

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FZNT01 KWBC 212224
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC MON APR 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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).

SECURITE

NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1800 UTC APR 21. 
24 HOUR FORECAST VALID 1800 UTC APR 22.
48 HOUR FORECAST VALID 1800 UTC APR 23.

.WARNINGS.

...STORM WARNING...
.LOW 48N51W 983 MB MOVING NE 15 KT. WITHIN 480 NM SW SEMICIRCLE
AND WITHIN 2400 NM NW SEMICIRCLE WINDS 35 TO 45 KT. SEAS 12 TO 24
FT. ELSEWHERE FROM 35N TO 55N BETWEEN 62W AND 35W WINDS 25 TO 40
KT. SEAS 9 TO 18 FT.
.18 HOUR FORECAST LOW 51N44W 981 MB. WITHIN 240 NM NE OF A LINE
FROM 50N49W TO 53N48W TO 58N40W WINDS 35 TO 50 KT. SEAS 12 TO 24
FT.
.24 HOUR FORECAST LOW 51N43W 985 MB. WITHIN 600 NM N AND 480 NM
NW QUADRANT WINDS 35 TO 50 KT. SEAS 15 TO 28 FT. ELSEWHERE FROM
37N TO 63N E OF A LINE FROM 63N41W TO 54N55W TO 41N54W TO 35N38W
WINDS 25 TO 40 KT. SEAS 12 TO 24 FT...HIGHEST S OF CENTER.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER E OF AREA NEAR
51N32W 992 MB. WITHIN 120 NM W OF A LINE FROM 57N43W TO 62N39W
WINDS 35 TO 50 KT. SEAS 12 TO 24 FT. ELSEWHERE WITHIN 720 NM SW
QUADRANT...WITHIN 300 NM W OF A LINE FROM 50N41W TO 54N45W TO
60N40W...AND FROM 59N TO 65N E OF 42W WINDS 25 TO 40 KT. SEAS 12
TO 24 FT...HIGHEST S OF MAIN CENTER. ALSO S OF 65N E OF 57W WINDS
TO 25 KT. SEAS 8 TO 15 FT.

...GALE WARNING...
.FROM 55N TO 60N BETWEEN 42W AND 58W...AND N OF 57N E OF 42W
WINDS 25 TO 40 KT. SEAS 8 TO 18 FT...HIGHEST NEAR 58N47W.
.24 HOUR ASSOCIATED CONDITIONS ABSORBED BY LOW 51N43W DESCRIBED
ABOVE.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST FROM 37N TO 45N BETWEEN 65W AND 71W WINDS TO 25
KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 120 NM SW OF A FRONT FROM 47N60W TO
44N57W TO 43N57W TO 39N65W WINDS 20 TO 30 KT. SEAS TO 8 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 59N
BETWEEN 46W AND 62W.
.24 HOUR FORECAST FROM 45N TO 62N BETWEEN 40W AND 51W AND FROM
40N TO 44N BETWEEN 68W AND 70W.
.48 HOUR FORECAST DENSE FOG WITHIN 120 NM W OF A LINE FROM 51N43W
TO 57N44W TO 64N36W...AND FROM 42N TO 51N BETWEEN 57W AND
68W...INCLUDING WITHIN THE GULF OF SAINT LAWRENCE.

.LIGHT FREEZING SPRAY N OF 61N W OF GREENLAND.
.24 HOUR FORECAST N OF 62N W OF GREENLAND.
.48 HOUR FORECAST LITTLE CHANGE.

.FORECASTER HYDE. 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 MON APR 21.
24 HOUR FORECAST VALID 1800 UTC TUE APR 22.
48 HOUR FORECAST VALID 1800 UTC WED APR 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 29N61W TO 28N65W TO 27N66W TO 25N66W TO 26N63W TO
29N61W N TO NE WINDS 20 TO 25 KT. SEAS 9 TO 11 FT. ELSEWHERE
WITHIN 
26N62W TO 25N66W TO 28N67W TO 26N69W TO 22N70W TO 22N65W TO
26N62W
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE SWELL.
.24 HOUR FORECAST WITHIN 28N56W TO 31N53W TO 31N59W TO 29N63W TO
26N61W TO 23N54W TO 28N56W E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
ELSEWHERE WITHIN 26N62W TO 31N59W TO 29N67W TO 25N68W TO 22N70W 
TO 19N69W TO 26N62W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE 
SWELL.
.48 HOUR FORECAST WITHIN 27N56W TO 26N58W TO 25N57W TO 26N56W TO
27N56W E TO SE WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE
WITHIN 
31N56W TO 31N63W TO 26N71W TO 24N70W TO 28N56W TO 31N56W WINDS 20
KT 
OR LESS. SEAS 8 TO 9 FT IN NE SWELL. WITHIN 31N35W TO 31N46W TO 
29N41W TO 29N39W TO 30N35W TO 31N35W WINDS 20 KT OR LESS. SEAS 8 
TO 9 FT IN NW SWELL.

.CARIBBEAN WITHIN 20N73W TO 19N79W TO 18N79W TO 18N76W TO 19N74W
TO 20N73W...INCLUDING BETWEEN CUBA AND JAMAICA...NE TO E WINDS 
20 TO 25 KT. SEAS 8 FT.
.24 HOUR FORECAST WITHIN 19N76W TO 20N77W TO 20N78W TO 19N79W TO
18N79W TO 18N76W TO 19N76W...INCLUDING BETWEEN CUBA AND 
JAMAICA...E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.CARIBBEAN WITHIN 14N77W TO 14N80W TO 12N81W TO 10N80W TO 10N77W
TO 11N74W TO 14N77W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
WITHIN 16N72W TO 17N73W TO 16N74W TO 15N75W TO 14N73W TO 15N72W
TO 16N72W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE SWELL.
.24 HOUR FORECAST WITHIN 12N75W TO 12N78W TO 10N79W TO 09N78W TO
11N76W TO 11N74W TO 12N75W NE WINDS 20 TO 25 KT. SEAS 8 FT.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.CARIBBEAN 03 HOUR FORECAST WITHIN 18N67W TO 18N70W TO 18N71W TO
17N71W TO 16N68W TO 17N66W TO 18N67W...INCLUDING IN MONA
PASSAGE...N TO NE WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.CARIBBEAN 09 HOUR FORECAST WITHIN 22N79W TO 22N80W TO 21N81W TO
20N80W TO 20N77W TO 22N79W NE TO E WINDS 20 TO 25 KT. SEAS LESS
THAN 8 FT.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.GULF OF AMERICA WITHIN 24N83W TO 24N84W TO 23N85W TO 23N83W TO 
23N82W TO 24N83W...INCLUDING STRAITS OF FLORIDA...NE WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT. 
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.GULF OF AMERICA 03 HOUR FORECAST WITHIN 22N87W TO 23N88W TO
22N90W TO 21N89W TO 22N88W TO 22N87W NE TO E WINDS 20 TO 25 KT.
SEAS LESS THAN 8 FT.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 22N87W TO 23N88W TO 22N90W TO 21N89W TO
22N88W TO 22N87W NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.



.FORECASTER ERA. NATIONAL HURRICANE CENTER.

$$