HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1145 UTC TUE MAR 31 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).
FROM APRIL 1 TO OCTOBER 15, DUE TO CLIMATOLOGY OF THE NORTH
PACIFIC, HIGH SEAS FORECASTS WILL ONCE AGAIN INCLUDE ALL
FORECASTS OF WINDS 20 TO 30 KNOTS AND SEAS 2.5 METERS OR
GREATER.
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 0600 UTC MAR 31.
24 HOUR FORECAST VALID 0600 UTC APR 01.
48 HOUR FORECAST VALID 0600 UTC APR 02.
.WARNINGS.
...GALE WARNING...
.LOW 54N149W 994 MB MOVING SE 15 KT. FROM 42N TO 60N BETWEEN 135W
AND 156W AREA OF SW WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 50N139W 991 MB.
FROM 38N TO 57N BETWEEN 126W AND 150W WINDS 25 TO 40 KT. SEAS 3
TO 5.5 M. ELSEWHERE FROM 36N TO 60N BETWEEN 128W AND 156W WINDS
20 TO 30 KT. SEAS 3 TO 5 M.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 46N128W 1002 MB.
WITHIN 420 NM SW QUADRANT WINDS 25 TO 35 KT. SEAS 3.5 TO 6 M.
ELSEWHERE FROM 35N TO 52N E OF 146W WINDS 20 TO 30 KT. SEAS 3 TO
5 M.
...GALE WARNING...
.LOW 48N180W 1000 MB MOVING NE 15 KT. EXCEPT AS DESCRIBED WITH
LOW 54N149W ABOVE...WITHIN 300 NM E SEMICIRCLE AND FROM 38N TO
46N W OF 150W WINDS 20 TO 30 KT. SEAS TO 4 M. WINDS AND SEAS
HIGHEST SE OF LOW.
.06 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 50N180W 998 MB.
WITHIN 240 NM E SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 4 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 51N172W 996 MB.
WITHIN 300 NM NE...420 NM SE...360 NM SW...AND 240 NM NW
QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO 5 M. ELSEWHERE FROM 38N TO
54N W OF 162W WINDS 20 TO 30 KT. SEAS TO 4 M.
.48 HOUR FORECAST LOW 52N168W 996 MB. WITHIN 660 NM SE...540 NM
SW...AND 240 NM NW QUADRANTS WINDS 25 TO 35 KT. SEAS 3 TO 5.5 M.
...GALE WARNING...
.30 HOUR FORECAST LOW 31N179W 1014 MB. WITHIN 300 NM NW QUADRANT
AREA OF NE WINDS 25 TO 35 KT. SEAS TO 4 M.
.48 HOUR FORECAST LOW 31N178W 1015 MB. S OF 35N W OF 176W WINDS
20 TO 30 KT. SEAS TO 4 M.
.SYNOPSIS AND FORECAST.
.COMPLEX LOW WITH MAIN CENTER 37N133W 1011 MB MOVING E 10 KT. S
OF 40N BETWEEN 135W AND 170W WINDS 20 TO 30 KT. SEAS 3 TO 4.5 M.
.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DIMINISHED.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N TO 51N W OF
164W...AND WITHIN AN AREA BOUNDED BY A LINE FROM 54N143W TO
50N138W TO 50N135W TO 57N140W TO 56N157W TO 53N156W TO 54N143W.
.24 HOUR FORECAST DENSE FOG FROM 46N TO 55N BETWEEN 158W AND 180W
AND WITHIN 90 NM NE OF A LINE FROM 55N146W TO 48N130W.
.48 HOUR FORECAST DENSE FOG FROM 49N TO 56N BETWEEN 145W AND
167W.
.24 HOUR FORECAST LIGHT FREEZING SPRAY N OF A LINE FROM 55N167W
TO 56N171W TO 58N178W.
.48 HOUR FORECAST LIGHT FREEZING SPRAY N OF A LINE FROM 58N174W
TO 59N178W TO 60N178W.
.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 0600 UTC TUE MAR 31.
24 HOUR FORECAST VALID 0600 UTC WED APR 1.
48 HOUR FORECAST VALID 0600 UTC THU APR 2.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.WITHIN 16N94W TO 16N95W TO 15N95W TO 14N95W TO 15N95W TO 16N94W
...INCLUDING THE GULF OF TEHUANTEPEC...NW TO N WINDS 20 TO 25
KT. SEAS LESS THAN 2.5 M.
.06 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.WITHIN 11N86W TO 11N88W TO 11N89W TO 10N89W TO 10N86W TO 11N86W
...INCLUDING THE GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT.
SEAS BUILDING TO 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.18 HOUR FORECAST TROUGH FROM 32N114W TO 30.5N114.5W. WITHIN
31N114W TO 30N115W TO 30N114W TO 31N114W...INCLUDING THE GULF OF
CALIFORNIA...S TO SW WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.27 HOUR FORECAST TROUGH WEAKENING. CONDITIONS IMPROVE. WINDS 20
KT OR LESS. SEAS LESS THAN 2.5 M.
.36 HOUR FORECAST WITHIN 03S96W TO 02.5S101.5W TO 02.5S105.5W TO
03S110W TO 03.4S110.5W TO 03.4S95.5W TO 03S96W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 02S87W TO 01N101W TO 01S106W TO 02S114W
TO 03.4S117W TO 03.4S84W TO 02S87W...EXCEPT LEE OF GALAPAGOS
ISLANDS...WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW
SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 0700 UTC TUE MAR 31...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 07N78W TO 04N106W. ITCZ FROM 04N106W TO 04N120W TO
07N133W TO BEYOND 04N140W. SECOND ITCZ FROM 03.4S89W TO 03.4S96W
TO 02S104W TO 03.4S111W. SCATTERED MODERATE ISOLATED STRONG FROM
02N TO 08N BETWEEN 130W AND 139W. SIMILAR CONVECTION FROM 02S TO
03.4S BETWEEN 89W AND 99W. SCATTERED MODERATE FROM 03N TO 06N
BETWEEN 86W AND 93W...AND FROM 06N TO 09N BETWEEN 95W AND 104W.
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 0600 UTC MAR 31 2026.
24 HOUR FORECAST VALID 0600 UTC APR 01 2026.
48 HOUR FORECAST VALID 0600 UTC APR 02 2026.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.TROUGH 21N140W 18N147W 11N153W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 25N145W 14N145W.
.48 HOUR FORECAST NEW LOW NEAR 20N143W 1014 MB. TROUGH FROM
25N142W TO LOW TO 13N143W. WINDS 20 TO 25 KT FROM 27N TO 21N
BETWEEN 150W AND 140W.
.TROUGH 10N179W 08N180W MOVING W SLOWLY. ISOLATED MODERATE TSTMS
S OF 10N W OF 173W.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.
.24 HOUR FORECAST NEW FRONT 30N179W 27N180W. WINDS 20 TO 25 KT N
OF 28N W OF 178W.
.48 HOUR FORECAST FRONT 30N175W 26N177W 25N180W. WINDS 20 TO 25
KT N OF 28N W OF 176W.
.NE TO E WINDS 20 TO 25 KT N OF LINE 30N157W 21N178W 10N180W
12N163W 30N145W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT N OF LINE 30N151W
23N171W 17N168W 19N157W 30N142W.
.48 HOUR FORECAST WINDS EASED TO 20 KT OR LESS.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 2.5 TO 4 M N OF LINE 30N142W 15N151W 08N180W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 30N165W 25N179W
08N180E 08N164W 30N141W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M W OF LINE 18N180W 25N156W
27N144W 11N152W 03N180W.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.ITCZ 04N140W 03N145W 03N160W. ISOLATED MODERATE TSTMS WITHIN 180
NM OF ITCZ.
$$
.FORECASTER TROTTER. HONOLULU HI.=