HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC WED OCT 21 2026
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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC OCT 21.
24 HOUR FORECAST VALID 0000 UTC OCT 22.
48 HOUR FORECAST VALID 0000 UTC OCT 23.
.WARNINGS.
...STORM WARNING...
.LOW 36N69W 999 MB DRIFTING N THEN W. BETWEEN 60 NM AND 180 NM NW
SEMICIRCLE WINDS 35 TO 45 KT. SEAS 4 TO 6.5 M. ELSEWHERE S OF 43N
W OF 63W WINDS 25 TO 35 KT. SEAS 2.5 TO 5 M.
.06 HOUR FORECAST LOW 36N70W 998 MB. WITHIN 180 NM NW SEMICIRCLE
WINDS 40 TO 50 KT. SEAS 5.5 TO 7.5 M.
.24 HOUR FORECAST LOW 37N70W 992 MB. WITHIN 180 NM NW AND 120 NM
W QUADRANTS WINDS 35 TO 50 KT. SEAS 4 TO 7 M. ELSEWHERE FROM 32N
TO 43N BETWEEN 63W AND 77W WINDS 25 TO 35 KT. SEAS 3 TO 6 M.
.48 HOUR FORECAST INTENSIFYING LOW 40N67W 983 MB. WITHIN 150 NM W
SEMICIRCLE WINDS 50 TO 60 KT. SEAS 6 TO 9 M. ALSO WITHIN 240 NM S
AND W SEMICIRCLES WINDS 35 TO 50 KT. SEAS 4 TO 7 M. ELSEWHERE
FROM 32N TO 46N BETWEEN 56W AND 73W WINDS 25 TO 35 KT. SEAS 2.5
TO 4.5 M.
...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 64N39W 984 MB MOVING S 10 KT. N OF
65N E OF GREENLAND...AND FROM 58N TO 60N BETWEEN 39W AND 45W
WINDS 35 TO 45 KT. SEAS 3 TO 5.5 M. ELSEWHERE N OF 63N E OF
GREENLAND...AND FROM 46N TO 60N E OF 55W WINDS 25 TO 35 KT. SEAS
3 TO 5.5 M...HIGHEST NEAR 53N35W.
.06 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 61N36W 987 MB AND
SECOND CENTER E OF AREA NEAR 62N29W 988 MB. FROM 58N TO 60N
BETWEEN 38W AND 45W WINDS 40 TO 50 KT. SEAS 4 TO 6.5 M.
.18 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER E OF AREA NEAR
62N33W 985 MB. N OF 65N E OF GREENLAND...AND FROM 57N TO 60N E OF
44W WINDS 40 TO 50 KT. SEAS 4 TO 7 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 62N37W 980 MB.
WITHIN 90 NM NW AND W QUADRANTS...N OF 64N E OF GREENLAND...AND
FROM 55 TO 60N E OF 44W WINDS 35 TO 50 KT. SEAS 4 TO 7 M.
ELSEWHERE N OF 50N E OF 48W WINDS 25 TO 35 KT. SEAS 3 TO 6 M.
.48 HOUR FORECAST COMPLEX LOW E OF AREA. REMAINING CONDITIONS
DESCRIBED WITH LOW 59N47W BELOW.
...GALE WARNING...
.LOW 45N51W 1014 MB MOVING E 40 KT. WITHIN 300 NM SE QUADRANT
WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.12 HOUR FORECAST LOW 47N39W 1008 MB. FROM 40N TO 47N E OF 47W
WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW AND CONDITIONS E OF AREA.
...GALE WARNING...
.36 HOUR FORECAST NEW LOW NEAR 58N54W 998 MB. WITHIN 480 NM SE
AND 600 NM N QUADRANTS WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST LOW 59N47W 995 MB. FROM 52N TO 60N E OF
35W...AND N OF 60N BETWEEN 48W AND 63W WINDS 25 TO 40 KT. SEAS
2.5 TO 5 M IN MIXED SWELL.
.SYNOPSIS AND FORECAST.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 54N TO 58N E OF
41W...N OF 63N E OF GREENLAND...N OF 58N W OF 51W...AND FROM 42N
TO 49N BETWEEN 42W AND 55W.
.24 HOUR FORECAST DENSE FOG N OF 59N E OF 42W...FROM 56N TO 61N W
OF 45W...AND WITHIN 120 NM OF 40N70W.
.48 HOUR FORECAST DENSE FOG FROM 57N TO 63N E OF 57W...AND WITHIN
180 NM EITHER SIDE OF A LINE FROM 41N64W TO 51N35W.
.LIGHT FREEZING SPRAY NW AND N OF A LINE FROM 62N65W TO 64N52W.
.24 HOUR FORECAST LIGHT FREEZING SPRAY N OF A LINE FROM 63N66W TO
61N49W.
.48 HOUR FORECAST LIGHT FREEZING SPRAY N OF 64N E OF
GREENLAND...N OF 60N WITHIN 60 NM W OF GREENLAND...AND N OF A
LINE FROM 62N66W TO 66N60W.
.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 WED OCT 21.
24 HOUR FORECAST VALID 0000 UTC THU OCT 22.
48 HOUR FORECAST VALID 0000 UTC FRI OCT 23.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 31N68W TO 31N81W TO 25N80W TO 26N77W TO 22N73W TO
31N68W...INCLUDING ATLANTIC EXPOSURES...WINDS 20 KT OR LESS.
SEAS 2.5 TO 4.0 M IN N TO NE SWELL...HIGHEST N OF 29N W OF 77W.
.24 HOUR FORECAST WITHIN 31N68W TO 31N81W TO 27N80W TO 27N71W TO
31N68W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N TO NE SWELL.
.48 HOUR FORECAST WITHIN 31N67W TO 31N81W TO 26N80W TO 27N75W TO
26N72W TO 31N67W...INCLUDING ATLANTIC EXPOSURES...WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN N TO NE SWELL.
.GULF OF AMERICA WITHIN 20N94W TO 21N95W TO 21N96W TO 20N96W TO
19N96W TO 19N94W TO 20N94W...INCLUDING WITHIN 60 NM OF COAST OF
VERACRUZ...NW TO N WINDS 20 TO 25 KT. SEAS 2.5 M.
.24 HOUR FORECAST WITHIN 20N94W TO 21N95W TO 21N96W TO 20N96W TO
19N96W TO 19N94W TO 20N94W...INCLUDING WITHIN 60 NM OF COAST OF
VERACRUZ...N TO NE WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.30 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 ERA. NATIONAL HURRICANE CENTER.
$$