HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC MAY 18.
24 HOUR FORECAST VALID 1800 UTC MAY 19.
48 HOUR FORECAST VALID 1800 UTC MAY 20.
.WARNINGS.
...GALE WARNING...
.LOW 49N43W 999 MB MOVING SE 20 KT. FROM 37N TO 49N E OF 59W
WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW 45N33W 988 MB. FROM 32N TO 48N E OF 49W
WINDS 25 TO 35 KT. SEAS 3 TO 5.5 M. ELSEWHERE FROM 33N TO 48N E
OF 52W WINDS TO 25 KT. SEAS TO 4 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER E OF AREA NEAR
50N27W 984 MB. FROM 40N TO 50N E OF 42W WINDS 20 TO 30 KT. SEAS
2.5 TO 4 M...HIGHEST NEAR 41N35W.
..GALE WARNING...
.24 HOUR FORECAST NEW LOW 54N39W 993 MB. WITHIN 480 NM SW...240
NM NW...AND 300 NM N QUADRANTS WINDS 20 TO 30 KT. SEAS 2.5 TO 4
M. ELSEWHERE FROM 48N TO 60N E OF 47W WINDS LESS THAN 25 KT. SEAS
TO 3 M.
.48 HOUR FORECAST 55N44W 994 MB. WITHIN 240 NM SW OF A LINE FROM
55N47W TO 50N38W AND FROM 57N TO 60N BETWEEN 37W AND 51W WINDS 25
TO 35 KT. SEAS 2.5 TO 4.5 M.
.SYNOPSIS AND FORECAST.
.COMPLEX LOW E OF AREA WITH MAIN CENTER NEAR 54N26W 984 MB MOVING
E 20 KT. E OF A LINE FROM 62N41W TO 57N47W TO 49N35W WINDS 20 TO
30 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW MOVED WELL E OF AREA AND CONDITIONS MERGED
WITH LOW 54N39W DESCRIBED IN WARNINGS SECTION ABOVE.
.LOW 58N59W 1005 MB DRIFTING N 05 KT. WITHIN 120 NM NE QUADRANT
WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 61N62W 995 MB WITHIN 120 NM NE...180 NM
SE...AND 120 NM SW QUADRANTS AND N OF 62N W OF 58W WINDS 20 TO 30
KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST LOW DISSIPATED AND ASSOCIATED CONDITIONS
DIMINISHED.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER WELL INLAND NEAR
53N66W 993 MB. FROM 36N TO 45N W OF 45W WINDS 20 TO 30 KT. SEAS
TO 3 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 58N TO 65N W OF
59W...AND N OF 64N E OF GREENLAND.
.24 HOUR FORECAST DENSE FOG FROM 40N TO 44N BETWEEN 61W AND
69W...FROM 60N TO 64N W OF 51W...AND WITHIN 60 NM W OF A LINE
FROM 60N51W TO 55N50W.
.48 HOUR FORECAST DENSE FOG FROM 43N TO 49N BETWEEN 51W AND
64W...AND FROM 59N TO 62N BETWEEN 52W AND 59W.
.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 1800 UTC MON MAY 18.
24 HOUR FORECAST VALID 1800 UTC TUE MAY 19.
48 HOUR FORECAST VALID 1800 UTC WED MAY 20.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 15N38W TO 19N43W TO 20N57W TO 15N61W TO 06N52W TO
07N39W TO 15N38W...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 12N53W TO 16N55W TO 18N61W TO 08N55W TO
07N45W TO 10N45W TO 12N53W...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 TO SE WINDS 20 TO 25 KT.
SEAS LESS THAN 2.5 M.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.30 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 2.5 TO
3.0 M IN E SWELL.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.ATLC 42 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.
.48 HOUR FORECAST WITHIN 31N35W TO 31N42W TO 29N41W TO 29N38W TO
29N35W TO 31N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO
N SWELL.
.CARIBBEAN WITHIN 14N70W TO 15N73W TO 16N78W TO 13N80W TO 11N78W
TO 11N71W TO 14N70W...INCLUDING THE GULF OF VENEZUELA...NE TO E
WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST WITHIN 13N70W TO 15N77W TO 15N79W TO 13N81W TO
11N80W TO 10N78W TO 13N70W...INCLUDING THE GULF OF VENEZUELA...
NE TO E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.48 HOUR FORECAST WITHIN 13N70W TO 15N73W TO 13N74W TO 12N73W TO
12N72W TO 11N69W TO 13N70W...INCLUDING THE GULF OF VENEZUELA...
NE TO E WINDS 20 TO 25 KT. SEAS TO 2.5 M. WITHIN 14N75W
TO 14N78W TO 14N79W TO 12N80W TO 10N78W TO 12N75W TO 14N75W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NE TO E SWELL.
.CARIBBEAN 12 HOUR FORECAST WITHIN 17N85W TO 17N86W TO 17N87W TO
16N87W TO 16N85W TO 17N85W E TO SE WINDS 20 TO 25 KT. SEAS LESS
THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.GULF OF AMERICA 12 HOUR FORECAST WITHIN 23N88W TO 23N91W TO
21N91W TO 21N89W TO 22N88W TO 23N88W...INCLUDING WITHIN 60 NM OF
COAST OF CAMPECHE...E TO SE WINDS 20 TO 25 KT. SEAS LESS THAN
2.5 M.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST WITHIN 23N88W TO 23N91W TO 21N91W TO 21N89W TO
22N88W TO 23N88W...INCLUDING WITHIN 60 NM OF COAST OF
CAMPECHE...E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.36 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.
$$