HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC FRI SEP 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SEP 18.
24 HOUR FORECAST VALID 0000 UTC SEP 19.
48 HOUR FORECAST VALID 0000 UTC SEP 20.
.WARNINGS.
...STORM WARNING...
.18 HOUR FORECAST LOW 50N62W 1003 MB. WITHIN 180 NM W SEMICIRCLE
WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER NEAR 50N58W 992
MB. WITHIN 300 NM S SEMICIRCLE AND 180 NM NE QUADRANT WINDS 25 TO
40 KT. SEAS 2.5 TO 4.5 M. ELSEWHERE FROM 36N TO 54N BETWEEN 43W
AND 65W WINDS TO 25 KT. SEAS TO 2.5 M.
.36 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER NEAR 51N52W 985
MB. WITHIN 150 NM NW QUADRANT WINDS 35 TO 50 KT. SEAS 4 TO 5.5 M.
ALSO WITHIN 300 NM N AND NE QUADRANTS...AND 540 NM SW QUADRANT
WINDS 25 TO 35 KT. SEAS 3 TO 4.5 M. ELSEWHERE WITHIN 480 NM
NE...840 NM SE...AND 900 NM SW QUADRANTS WINDS TO 25 KT. SEAS TO
3 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER NEAR 51N49W 981
MB. WITHIN 240 NM SW AND W QUADRANTS WINDS 45 TO 60 KT. SEAS 5 TO
8 M. ALSO WITHIN 480 NM S QUADRANT...300 NM NW SEMICIRCLE...AND
WITHIN 240 NM N OF A FRONT FROM 54N48W TO 55N43W TO 53N40W WINDS
30 TO 45 KT. SEAS 3 TO 6 M. ELSEWHERE FROM 37N TO 58N E OF 62W
WINDS 20 TO 30 KT. SEAS TO 3 M.
...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 61N35W 983 MB MOVING E 20 KT.
BETWEEN 300 NM AND 780 NM SW SEMICIRCLE WINDS 25 TO 40 KT. SEAS 3
TO 5 M. ELSEWHERE WITHIN 960 NM S...900 NM SW...AND 780 NM W
QUADRANTS WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST COMPLEX LOW WELL E OF AREA. FROM 54N TO 60N E
OF 45W AREA OF NW TO W WINDS 25 TO 40 KT. SEAS 3 TO 6.5 M.
ELSEWHERE FROM 47N TO 61N E OF 51W WINDS TO 25 KT. SEAS TO 4 M.
.48 HOUR FORECAST COMPLEX LOW AND CONDITIONS WELL E OF AREA.
.SYNOPSIS AND FORECAST.
.48 HOUR FORECAST NEW LOW JUST E OF AREA NEAR 65N32W 1000 MB.
WITHIN 240 NM NW QUADRANT WINDS TO 25 KT. SEAS TO 3 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 43N TO 45N W OF
66W...AND WITHIN 120 NM OF 43N49W.
.24 HOUR FORECAST DENSE FOG WITHIN 120 NM OF 43N48W.
.48 HOUR FORECAST DENSE FOG N OF 63N E OF 40W...AND FROM 54N TO
57N BETWEEN 40W AND 50W.
.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 FRI SEP 18.
24 HOUR FORECAST VALID 0000 UTC SAT SEP 19.
48 HOUR FORECAST VALID 0000 UTC SUN SEP 20.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC AND CARIBBEAN WITHIN 20N70W TO 22N70W TO 21N73W TO 19N72W
TO 16N73W TO 17N71W TO 20N70W NE TO E WINDS 20 TO 25 KT. SEAS
LESS THAN 2.5 M.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.CARIBBEAN WITHIN 15N68W TO 15N72W TO 11N74W TO 10N72W TO 11N66W
TO 15N68W...INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20
TO 30 KT. SEAS BUILDING TO 2.5 TO 3.0 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.
$$