HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC APR 23.
24 HOUR FORECAST VALID 0000 UTC APR 24.
48 HOUR FORECAST VALID 0000 UTC APR 25.
.WARNINGS.
...HURRICANE FORCE WIND WARNING...
.LOW 40N73W 1014 MB MOVING E 20 KT AND RAPIDLY INTENSIFYING.
WITHIN 300 NM SE AND 420 NM S QUADRANTS WINDS 20 TO 30 KT. SEAS
LESS THAN 2.5 M.
.06 HOUR FORECAST INTENSIFYING LOW 39N69W 1010 MB. WITHIN 90 NM
EITHER SIDE OF A LINE FROM 35N72W TO 37N68W WINDS 25 TO 35 KT.
SEAS TO 3 M.
.24 HOUR FORECAST LOW 41N58W 988 MB INTENSIFYING. WITHIN 90 NM N
AND W SEMICIRCLES WINDS 40 TO 55 KT. SEAS 3 TO 4.5 M. ALSO WITHIN
240 NM N SEMICIRCLE...AND WITHIN 420 NM SE AND 660 NM SW
QUADRANTS WINDS 25 TO 40 KT. SEAS 2.5 TO 4 M. ELSEWHERE S OF 44N
BETWEEN 51W AND 71W WINDS TO 25 KT. SEAS TO 2.5 M.
.30 HOUR FORECAST LOW 41N57W 983 MB. WITHIN 90 NM SW SEMICIRCLE
WINDS 55 TO 65 KT. SEAS 5 TO 7 M.
.48 HOUR FORECAST LOW 44N51W 976 MB. WITHIN 150 NM S SEMICIRCLE
WINDS 40 TO 55 KT. SEAS 4 TO 6.5 M. WITHIN 300 NM OF LOW CENTER
AND WITHIN 420 NM S AND SE QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO
5.5 M. ELSEWHERE S OF 50N E OF 65W WINDS TO 25 KT. SEAS TO 3 M.
...GALE WARNING...
.LOW 36N47W 1010 MB MOVING NE 10 KT. S OF 40N BETWEEN 47W AND 55W
WINDS 25 TO 35 KT. SEAS 2.5 TO 3.5 M. ELSEWHERE S OF 42N BETWEEN
47W AND 67W WINDS TO 25 KT. SEAS TO 3 M.
.06 HOUR FORECAST LOW 39N46W 1004 MB. FROM 33N TO 39N BETWEEN 50W
AND 46W WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST LOW 39N39W 999 MB. WITHIN 420 NM NW AND 360 NM
SW QUADRANTS WINDS 25 TO 35 KT. SEAS 3 TO 5 M. ELSEWHERE S OF 46N
E OF 51W WINDS TO 25 KT. SEAS 2.5 TO 4 M.
.42 HOUR FORECAST COMBINED LOW 52N35W 999 MB. FROM 57N TO 61N
BETWEEN 40W AND 49W AREA OF NE WINDS 25 TO 40 KT. SEAS 3 TO 4.5
M.
.48 HOUR FORECAST LOW E OF AREA AND REMAINING CONDITIONS
DESCRIBED WITH HURRICANE FORCE WIND WARNING ABOVE.
...GALE WARNING...
.COMPLEX LOW E OF AREA WITH FIRST CENTER 44N25W 978 MB MOVING N
10 KT AND SECOND CENTER 49N22W 990 MB MOVING NW 25 KT THEN
TURNING SW AFTER 12 HOURS. FROM 39N TO 54N E OF 38W WINDS 20 TO
30 KT. SEAS 3 TO 5.5 M. ELSEWHERE S OF 58N E OF 43W WINDS TO 25
KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST COMPLEX LOW E OF AREA WITH MEAN CENTER NEAR
49N30W 990 MB. FROM 46N TO 60N E OF 40W...AND FROM 48N TO 60N E
OF 54W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M...HIGHEST NEAR
54N37W.
.48 HOUR FORECAST COMBINED LOW 51N35W 1003 MB. WITHIN 90 NM
EITHER SIDE OF A LINE FROM 60N41W TO 57N50W AREA OF NE WINDS 35
TO 45 KT. SEAS 3 TO 5 M. ALSO FROM 55N TO 60N W OF 40W...AND N OF
60N W OF 54W WINDS 25 TO 35 KT. SEAS 2.5 TO 3.5 M. ELSEWHERE N OF
50N W OF 35W WINDS TO 25 KT. SEAS TO 3.5 M.
.SYNOPSIS AND FORECAST.
.COMPLEX LOW WITH FIRST CENTER 48N53W 1003 MB MOVING NW 10 KT AND
SECOND CENTER 44N47W 1007 MB MOVING SE 10 KT. WITHIN 360 NM NE
AND SW QUADRANTS OF FIRST CENTER...AND WITHIN 300 NM SW QUADRANT
OF SECOND CENTER WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST FIRST CENTER WELL INLAND. REMAINING LOW 49N46W
1004 MB. CONDITIONS DESCRIBED WITH LOW 39N39W IN WARNINGS SECTION
ABOVE.
.LOW N OF AREA 70N56W 1020 MB MOVING N 10 KT. N OF 58N BETWEEN
47W AND 57W WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW WELL N OF AREA AND ASSOCIATED CONDITIONS
DIMINISHED.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 240 NM EITHER
SIDE OF A LINE FROM 40N46W TO 54N54W TO 67N50W...AND N OF 41N W
OF 66W.
.24 HOUR FORECAST DENSE FOG FROM 38N TO 47N BETWEEN 53W AND
68W...AND FROM 50N TO 57N E OF 41W.
.48 HOUR FORECAST DENSE FOG WITHIN AN AREA BOUNDED BY A LINE FROM
45N64W TO 40N50W TO 44N40W TO 50N35W TO 62N35W TO 53N64W TO
45N64W.
.LIGHT FREEZING SPRAY WITHIN THE GULF OF SAINT LAWRENCE N OF 46N
BETWEEN 57W AND 62W...AND NW OF A LINE FROM 59N59W TO 65N52W.
.24 HOUR FORECAST LIGHT FREEZING SPRAY N OF 53N W OF 53W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 61N W OF
53W.
.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 0000 UTC THU APR 23.
24 HOUR FORECAST VALID 0000 UTC FRI APR 24.
48 HOUR FORECAST VALID 0000 UTC SAT APR 25.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 31N50W TO 31N57W TO 29N56W TO 29N54W TO 30N52W TO
31N50W N WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M. ELSEWHERE WITHIN
27N52W TO 31N50W TO 25N74W TO 21N74W TO 21N61W TO 27N52W WINDS
20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N SWELL.
.24 HOUR FORECAST WITHIN 31N35W TO 31N51W TO 29N53W TO 26N53W TO
26N51W TO 29N46W TO 31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0
M IN NW TO N SWELL.
.48 HOUR FORECAST WITHIN 31N35W TO 31N48W TO 27N47W TO 25N41W TO
25N39W TO 31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N TO
NE SWELL.
.ATLC WITHIN 31N35W TO 31N38W TO 28N37W TO 27N35W TO 31N35W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N SWELL.
.24 HOUR FORECAST WITHIN 31N35W TO 31N38W TO 30N37W TO 30N36W TO
30N35W TO 31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N TO
NE SWELL.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.ATLC 36 HOUR FORECAST WITHIN 31N60W TO 31N66W TO 30N64W TO
30N63W TO 31N60W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW
SWELL.
.48 HOUR FORECAST WITHIN 31N51W TO 31N64W TO 29N63W TO 29N56W TO
30N53W TO 31N51W 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 AL. NATIONAL HURRICANE CENTER.
$$