HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1745 UTC THU MAY 21 2026
CCODE/1:31:12:01:00/AOW+POR/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).
SECURITE
PACIFIC S OF 67N AND N OF 30N E OF A LINE FROM THE BERING STRAIT
TO 53N172E TO 50N180W TO 30N180W
ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS
SYNOPSIS VALID 1200 UTC MAY 21.
24 HOUR FORECAST VALID 1200 UTC MAY 22.
48 HOUR FORECAST VALID 1200 UTC MAY 23.
.WARNINGS.
...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 56N168W 980 MB MOVING NE 15 KT.
WITHIN 660 NM SE AND 540 NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS
3.5 TO 6.5 M...HIGHEST S OF THE ALEUTIAN ISLANDS. ELSEWHERE FROM
37N TO 62N W OF 150W WINDS TO 25 KT. SEAS TO 4 M.
.24 HOUR FORECAST COMBINED LOW 60N164W 996 MB. FROM 39N TO 57N
BETWEEN 55W AND 176W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST LOW 61N165W 1003 MB. WITHIN 1200 NM SE QUADRANT
WINDS LESS THAN 25 KT. SEAS TO 3.5 M.
.SYNOPSIS AND FORECAST.
.FROM 33N TO 50N BETWEEN 124W AND 132W AREA OF N TO NW WINDS 20
TO 30 KT. SEAS 2.5 TO 4 M. ELSEWHERE S OF 51N BETWEEN 121W AND
136W AREA OF NW TO N WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST S OF 50N BETWEEN 122W AND 136W AREA OF NW TO N
WINDS 20 TO 30 KT. SEAS TO 4 M.
.48 HOUR FORECAST FROM 32N TO 50N BETWEEN 123W AND 133W AREA OF
NW TO N WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.LOW 60N146W 1013 MB MOVING N 10 KT. N OF 56N BETWEEN 134W AND
148W WINDS LESS THAN 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW DISSIPATED AND ASSOCIATED CONDITIONS
DIMINISHED.
.WITHIN 120 NM OF 49N128W AREA OF NW WINDS TO 25 KT. SEAS TO 3
M.
.24 HOUR FORECAST WITHIN 120 NM OF 49N128W AREA OF NW WINDS TO 25
KT. SEAS TO 3 M.
.48 HOUR FORECAST WITHIN 120 NM OF 49N128W AREA OF NW WINDS TO 25
KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW W OF AREA NEAR 45N171E 1003 MB. W OF A LINE
FROM 46N180W TO 42N173W TO 37N180W WINDS 20 TO 30 KT. SEAS LESS
THAN 2.5 M.
.48 HOUR FORECAST LOW 49N171W 993 MB. FROM 40N TO 52N W OF 155W
WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF 54N BETWEEN
162W AND 178W AND WITHIN 60 NM NE OF A LINE FROM 44N142W TO
50N138W.
.24 HOUR FORECAST DENSE FOG WITHIN THE BERING SEA E OF 178E AND
FROM 39N TO 42N W OF 176W.
.48 HOUR FORECAST DENSE FOG WITHIN THE BERING SEA N OF 59N
BETWEEN 162W AND 173W...AND FROM 40N TO 51N BETWEEN 156W AND
178W.
.FORECASTER HYDE. OCEAN PREDICTION CENTER.
NWS NATIONAL HURRICANE CENTER MIAMI FL
E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W
SYNOPSIS VALID 1200 UTC THU MAY 21.
24 HOUR FORECAST VALID 1200 UTC FRI MAY 22.
48 HOUR FORECAST VALID 1200 UTC SAT MAY 23.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.WITHIN 11N86W TO 11N87W TO 10N89W TO 10N87W TO 11N86W NE TO E
WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.06 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.WITHIN 30N124W TO 28N132W TO 23N136W TO 30N140W TO 06N140W TO
12N121W TO 30N124W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N
TO NE SWELL.
.24 HOUR FORECAST WITHIN 11N137W TO 11N139W TO 11N140W TO
10N140W TO 10N138W TO 10N137W TO 11N137W WINDS 20 KT OR LESS.
SEAS 2.5 M IN N TO NE SWELL.
.30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.18 HOUR FORECAST WITHIN 03S119W TO 03S119.5W TO 03S120W TO
03.4S120W TO 03.4S118.5W TO 03S119W WINDS 20 KT OR LESS. SEAS
2.5 M IN S TO SW SWELL.
.24 HOUR FORECAST WITHIN 03S115W TO 02S117W TO 02S120W TO
03.4S120W TO 03S115W TO 03S115W WINDS 20 KT OR LESS. SEAS 2.5 M
IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 02S104W TO 01S110W TO 02S116W TO
02S120W TO 03.4S120W TO 03.4S104W TO 02S104W WINDS 20 KT OR LESS.
SEAS 2.5 M IN S TO SW SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 1500 UTC THU MAY 21...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N74.5W TO 10N84W TO 08.5N114W TO 05.5N123W
TO 06N126W. ITCZ FROM 06N126W TO 08N133W TO BEYOND 06N140W.
SCATTERED MODERATE TO STRONG CONVECTION FROM 02N TO 10N E OF 97W
AND FROM 02.5N TO 14N BETWEEN 97W AND 115W. SCATTERED MODERATE
CONVECTION FROM 04N TO 11N W OF 115W.
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 1200 UTC MAY 21 2026.
24 HOUR FORECAST VALID 1200 UTC MAY 22 2026.
48 HOUR FORECAST VALID 1200 UTC MAY 23 2026.
.WARNINGS.
...GALE WARNING...
.NE TO E WINDS 30 TO 35 KT AROUND THE MAIN HAWAIIAN ISLANDS. FOR
DETAILS SEE COASTAL WATERS FORECAST ISSUED BY NWS HONOLULU UNDER
AWIPS HEADER HFOCWFHFO AND WMO HEADER FZHW50 PHFO. SEE MORE
WINDS BELOW.
.24 HOUR FORECAST WINDS LITTLE CHANGE. SEE MORE WINDS BELOW.
.48 HOUR FORECAST WINDS 20 TO 30 KT AROUND THE MAIN HAWAIIAN
ISLANDS. SEE MORE WINDS BELOW.
.SYNOPSIS AND FORECAST.
.FRONT 30N178W 28N180W MOVING NW 10 KT.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.
.WINDS 20 TO 30 KT IN AREA BOUNDED BY 24N164W 29N146W 11N148W
08N180W 14N180W 17N164W 24N164W.
.24 HOUR FORECAST WINDS 20 TO 30 KT FROM 26N TO 11N BETWEEN 176W
AND 152W.
.48 HOUR FORECAST WINDS 20 TO 30 KT FROM 26N TO 17N BETWEEN 173W
AND 153W.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 2.5 TO 3.5 M E OF LINE 27N158W 16N164W 13N180W 08N180W.
.24 HOUR FORECAST SEAS 2.5 TO 4 M N OF 06N...EXCEPT N OF LINE
17N180W 23N172W 30N160W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M FROM 29N TO 08N BETWEEN 177W
AND 147W.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.ITCZ 06N140W 04N143W 04N152W 05N165W 06N177W 06N180W. ISOLATED
MODERATE TSTMS WITHIN 240 NM OF ITCZ.
$$
.FORECASTER . HONOLULU HI.=