HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC THU APR 23 2026
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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC APR 23.
24 HOUR FORECAST VALID 1800 UTC APR 24.
48 HOUR FORECAST VALID 1800 UTC APR 25.
.WARNINGS.
...HURRICANE FORCE WIND WARNING...
.COMPLEX LOW WITH MEAN CENTER 40N60W 999 MB MOVING NE 15 KT AND
RAPIDLY INTENSIFYING. WITHIN 180 NM SE QUADRANT WINDS 40 TO 50
KT. SEAS 4 TO 5.5 M. ELSEWHERE WITHIN 240 NM EITHER SIDE OF A
LINE FROM 32N69W TO 41N55W WINDS 25 TO 40 KT. SEAS 2.5 TO 5 M.
.06 HOUR FORECAST LOW 41N57W 990 MB. WITHIN 60 NM NW AND W
QUADRANTS WINDS 50 TO 65 KT. SEAS 5 TO 7 M.
.24 HOUR FORECAST LOW 43N52W 977 MB. WITHIN 120 NM SW SEMICIRCLE
WINDS 40 TO 50 KT. SEAS 5 TO 8.5 M. ELSEWHERE FROM 37N TO 48N
BETWEEN 57W AND 43W WINDS 30 TO 45 KT. SEAS 3 TO 8 M. ELSEWHERE
WITHIN AN AREA BOUNDED BY A LINE FROM 31N35W TO 48N35W TO 48N57W
TO 40N70W TO 31N70W TO 31N35W WINDS 20 TO 30 KT. SEAS 2.5 TO 6
M.
.48 HOUR FORECAST LOW 47N49W 982 MB. WITHIN 300 NM SE QUADRANT
WINDS 25 TO 35 KT. SEAS 5 TO 6 M. ELSEWHERE WITHIN AN AREA
BOUNDED BY A LINE FROM 31N35W TO 50N35W TO 50N63W TO 31N68W TO
31N35W WINDS 20 TO 30 KT. SEAS 2.5 TO 6 M.
...GALE WARNING...
.FRONT FROM 46N44W TO LOW 39N40W 1001 MB TO 34N41W. FRONT AND LOW
MOVING NE 20 KT. WITHIN 240 NM W OF FRONT WINDS 25 TO 35 KT. SEAS
2.5 TO 5 M. ELSEWHERE FROM 31N TO 48N BETWEEN 56W AND 35W WINDS
TO 25 KT. SEAS 2.5 TO 5 M.
.24 HOUR FORECAST FRONT AND LOW MOVED E OF AREA. CONDITIONS
MERGED WITH LOW 43N52W DESCRIBED IN HURRICANE FORCE WIND WARNING
ABOVE.
...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER WELL E OF AREA AND SECONDARY CENTER
E OF AREA 48N31W 989 MB MOVING S 10 KT. WITHIN AN AREA BOUNDED BY
A LINE FROM 48N35W TO 61N35W TO 59N61W TO 48N51W TO 48N35W WINDS
20 TO 30 KT. SEAS 2.5 TO 5.5 M.
.24 HOUR FORECAST LOW 52N36W 996 MB. WITHIN 60 NM EITHER SIDE OF
A LINE FROM 58N46W TO 60N42W WINDS 30 TO 40 KT. SEAS 3 TO 4 M.
ELSEWHERE WITHIN AN AREA BOUNDED BY A LINE FROM 48N35W TO 63N35W
TO 58N60W TO 48N53W TO 48N35W WINDS 20 TO 30 KT. SEAS 2.5 TO 4
M.
.48 HOUR FORECAST LOW ABSORBED BY LOW 47N49W DESCRIBED IN
HURRICANE FORCE WIND WARNING ABOVE. FROM 50N TO 62N BETWEEN 44W
AND 35W...AND FROM 50N TO 67N W OF 44W...WINDS 20 TO 30 KT. SEAS
2.5 TO 4.5 M.
.SYNOPSIS AND FORECAST.
.NW OF A LINE FROM 59N59W TO 67N52W AREA OF N TO E WINDS TO 25
KT. SEAS TO 3 M.
.24 HOUR FORECAST FROM 63N TO 67N BETWEEN 58W AND THE W COAST OF
GREENLAND AREA OF N WINDS 20 TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST CONDITIONS ABSORBED BY THIRD GALE WARNING.
.N OF 63N E OF GREENLAND AREA OF SW WINDS TO 25 KT. SEAS TO 2.5
M.
.24 HOUR FORECAST CONDITIONS DIMINISHED.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 45N
BETWEEN 68W AND 66W...FROM 41N TO 44N BETWEEN 54W AND
59W...WITHIN 60 NM EITHER SIDE OF A LINE FROM 50N51W TO
47N47W...AND WITHIN 90 NM NW OF A LINE FROM 59N59W TO 64N54W.
.24 HOUR FORECAST DENSE FOG FROM 42N TO 47N BETWEEN 56W AND
50W...FROM 52N TO 58N BETWEEN 48W AND 40W...WITHIN 60 NM OF THE W
COAST OF GREENLAND FROM 60N TO 63N...AND IN THE GULF OF SAINT
LAWRENCE FROM 48N TO 50N BETWEEN 63W AND 60W.
.48 HOUR FORECAST DENSE FOG FROM 44N TO 50N BETWEEN 54W AND
46W...AND WITHIN 180 NM EITHER SIDE OF A LINE FROM 51N51W TO
60N35W.
.LIGHT FREEZING SPRAY IN THE GULF OF SAINT LAWRENCE N OF 49N E OF
60W.
.24 HOUR FORECAST LIGHT FREEZING SPRAY NW OF A LINE FROM 62N57W
TO 67N54W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY NW OF A LINE
FROM 61N57W TO 67N52W.
.FORECASTER CONNELLY. 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 THU APR 23.
24 HOUR FORECAST VALID 1800 UTC FRI APR 24.
48 HOUR FORECAST VALID 1800 UTC SAT APR 25.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC COLD FRONT FROM 31N43W TO 25N53W THEN STATIONARY TO 20N70W.
N
OF 27N W OF FRONT TO 60W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M
IN N
SWELL. N OF FRONT TO 22N BETWEEN 67W AND 73W NE WINDS 20 TO 25
KT.
SEAS 2.5 M.
.24 HOUR FORECAST COLD FRONT FROM 31N37W TO 25N45W THEN
STATIONARY
TO 20N70W. N OF 28N W OF FRONT TO 46W WINDS 20 KT OR LESS. SEAS
2.5
TO 3.0 M IN N SWELL. N OF 29N E OF FRONT WINDS 20 KT OR LESS.
SEAS
2.5 M IN N SWELL.
.36 HOUR FORECAST COLD FRONT FROM 31N35W TO 23N46W. N OF FRONT
AND E
OF 46W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N SWELL.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.ATLC 24 HOUR FORECAST N OF 30N BETWEEN 54W AND 62W WINDS 20 KT
OR
LESS. SEAS 2.5 TO 3.0 M IN NW SWELL.
.36 HOUR FORECAST N OF A LINE FROM 31N47W TO 29N51W TO 29N55W TO
31N62W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW SWELL.
.48 HOUR FORECAST N OF 30N BETWEEN 48W AND 62W SW TO W WINDS 20
TO
25 KT. SEAS 2.5 TO 3.5 M IN NW SWELL. ELSEWHERE N OF A LINE FROM
31N43W TO 28N50W TO 29N55W TO 31N62W WINDS 20 KT OR LESS. SEAS
2.5
TO 3.0 M IN NW SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.FORECASTER GR. NATIONAL HURRICANE CENTER.
$$