HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC MON MAY 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC MAY 18.
24 HOUR FORECAST VALID 1200 UTC MAY 19.
48 HOUR FORECAST VALID 1200 UTC MAY 20.
.WARNINGS.
...GALE WARNING...
.LOW E OF AREA NEAR 54N29W 984 MB MOVING E 20 KT. FROM 43N TO 62N
E OF 44W WINDS 25 TO 35 KT. SEAS 3 TO 6 M. ELSEWHERE FROM 37N TO
61N E OF 48W WINDS TO 25 KT. SEAS 2.5 TO 5 M.
.24 HOUR FORECAST LOW MOVED WELL E OF AREA AND CONDITIONS MERGED
WITH LOW 54N37W DESCRIBED BELOW.
...GALE WARNING...
.LOW 51N53W 997 MB MOVING SE 30 KT. WITHIN 480 NM SW QUADRANT AND
FROM 39N TO 47N BETWEEN 37W AND 57W WINDS 20 TO 30 KT. SEAS TO 3
M.
.06 HOUR FORECAST LOW 48N42W 999 MB. FROM 37N TO 51N E OF 59W
WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW 44N38W 996 MB. FROM 33N TO 47N E OF 52W
WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M. ELSEWHERE FROM 33N TO 47N E
OF 54W WINDS TO 25 KT. SEAS TO 4 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER E OF AREA NEAR
48N28W 984 MB. FROM 37N TO 50N E OF 45W WINDS 20 TO 30 KT. SEAS
2.5 TO 4.5 M...HIGHEST NEAR 41N35W.
..GALE WARNING...
.24 HOUR FORECAST NEW LOW 54N37W 994 MB. WITHIN 420 NM SW...360
NM NW...AND 240 NM N QUADRANTS WINDS 20 TO 30 KT. SEAS 2.5 TO 4
M. ELSEWHERE FROM 50N TO 61N E OF 48W WINDS LESS THAN 25 KT. SEAS
TO 3 M.
.48 HOUR FORECAST 53N40W 994 MB. WITHIN 180 NM SW OF A LINE FROM
56N58W TO 50N36W AND FROM 57N TO 60N BETWEEN 38W AND 49W WINDS 25
TO 35 KT. SEAS 2.5 TO 4.5 M.
.SYNOPSIS AND FORECAST.
.LOW 57N58W 1002 MB DRIFTING N 05 KT. WITHIN 180 NM NE SEMICIRCLE
WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 61N61W 996 MB WITHIN 180 NM OF CENTER
EXCEPT 300 NM N QUADRANT WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.
.FROM 56N TO 64N BETWEEN 37W AND 46W WINDS 20 TO 30 KT. SEAS TO
3.5 M.
.24 HOUR FORECAST CONDITIONS DIMINISHED AND MERGED WITH LOW
54N37W DESCRIBED IN WARNINGS SECTION ABOVE.
.48 HOUR FORECAST LOW WELL INLAND NEAR 53N71W 995 MB. FROM 37N TO
44N W OF 52W WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 57N TO 65N W OF
58W...FROM 43N TO 49N BETWEEN 43W AND 51W...WITHIN 60 NM SW OF A
LINE FROM 50N50W TO 56N56W...AND N OF 63N E OF GREENLAND.
.24 HOUR FORECAST DENSE FOG FROM 39N TO 43N BETWEEN 64W AND
70W...FROM 59N TO 53N W OF 52W...AND WITHIN 60 NM W OF A LINE
FROM 59N52W TO 53N51W.
.48 HOUR FORECAST DENSE FOG FROM 42N TO 48N BETWEEN 52W AND
64W...AND WITHIN 90 NM NE OF A LINE FROM 61N55W TO 56N49W.
.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 1200 UTC MON MAY 18.
24 HOUR FORECAST VALID 1200 UTC TUE MAY 19.
48 HOUR FORECAST VALID 1200 UTC WED MAY 20.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 17N39W TO 20N44W TO 20N57W TO 17N61W TO 06N53W TO
07N38W TO 17N39W...INCLUDING IN ATLANTIC EXPOSURES AND
PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M
IN NE TO E SWELL.
.24 HOUR FORECAST WITHIN 17N54W TO 19N60W TO 09N56W TO 07N52W TO
08N44W TO 11N44W TO 17N54W...INCLUDING IN ATLANTIC EXPOSURES AND
PASSAGES...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NE TO E
SWELL.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.ATLC 12 HOUR FORECAST WITHIN 20.5N71W TO 21N71.5W TO 20.5N72W
TO 20N72W TO 20N70.5W TO 20.5N71W E WINDS 20 TO 25 KT. SEAS LESS
THAN 2.5 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.36 HOUR FORECAST WITHIN 20.5N71W TO 21N71.5W TO 20.5N72W TO
20N72W TO 20N70.5W TO 20.5N71W E WINDS 20 TO 25 KT. SEAS LESS
THAN 2.5 M.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.ATLC 48 HOUR FORECAST WITHIN 31N35W TO 31N45W TO 30N43W TO
30N39W TO 31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO
N SWELL.
.CARIBBEAN WITHIN 16N73W TO 16N78W TO 13N80W TO 11N78W TO 13N71W
TO 16N73W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 16N76W TO 15N80W TO 13N82W TO 11N81W TO
11N76W TO 13N70W TO 16N76W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.5
M.
.48 HOUR FORECAST WITHIN 15N71W TO 15N77W TO 14N80W TO 11N78W TO
10N76W TO 13N71W TO 15N71W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0
M.
.CARIBBEAN 12 HOUR FORECAST WITHIN 17N85W TO 17N86W TO 17N87W TO
16N87W TO 16N85W TO 17N85W E WINDS 20 TO 25 KT. SEAS LESS THAN
2.5 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.36 HOUR FORECAST WITHIN 17N85W TO 17N86W TO 17N87W TO 16N87W TO
16N85W TO 17N85W E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.GULF OF AMERICA 12 HOUR FORECAST WITHIN 22N88W TO 23N89W TO
23N90W TO 22N90W TO 21N90W TO 22N88W E WINDS 20 TO 25 KT. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.36 HOUR FORECAST WITHIN 22N88W TO 23N89W TO 23N90W TO 22N90W TO
21N90W TO 22N88W E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.42 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.
$$