HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1145 UTC MON APR 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).
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 APR 20.
24 HOUR FORECAST VALID 0600 UTC APR 21.
48 HOUR FORECAST VALID 0600 UTC APR 22.
.WARNINGS.
...STORM WARNING...
.24 HOUR FORECAST LOW NEAR 52N178E 985 MB. NW OF A LINE FROM
53N172E TO 58N173W WINDS 25 TO 35 KT. SEAS 4 TO 6.5 M. ELSEWHERE
W AND NW OF A LINE FROM 58N172W TO 55N172W TO 50N164W TO 40N163W
WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M.
.48 HOUR FORECAST LOW 52N180W 972 MB. WITHIN 480 NM N AND 420 NM
NW QUADRANTS WINDS 35 TO 50 KT. SEAS 4.5 TO 7.5 M. ELSEWHERE N
OF 44N W OF 170W AND N OF 43N BETWEEN 155W AND 164W WINDS 25 TO
40 KT. SEAS 2.5 TO 6.5 M.
...GALE WARNING...
.LOW 58N175W 989 MB MOVING NE 15 KT. WITHIN 300 NM S AND
SE...AND 240 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 3.5 TO 7 M.
ELSEWHERE NW OF A LINE FROM 53N158W TO 50N168W WINDS 20 TO 30
KT. SEAS 3 TO 5.5 M.
.24 HOUR FORECAST LOW DISSIPATED WITH ASSOCIATED CONDITIONS
DIMINISHED.
...GALE WARNING...
.COMPLEX LOW WITH MAIN LOW 39N136W 1003 MB MOVING SE 10 KT AND
SECOND LOW 45N137W 1004 MB MOVING S 15 KT. WITHIN 420 NM SW AND
540 NM W AND NW QUADRANTS OF MAIN LOW WINDS 25 TO 40 KT. SEAS 5
TO 7 M. ELSEWHERE WITHIN 540 NM W SEMICIRCLE OF MAIN LOW WINDS
20 TO 30 KT. SEAS 2.5 TO 5.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN LOW 37N132W 1009 MB AND
SECOND NEW LOW 44N131W 1007 MB. WITHIN 420 NM SW QUADRANT OF
MAIN LOW AND 660 NM N AND 360 NM W QUADRANTS OF SECOND LOW WINDS
TO 25 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST LOW LOW 38N127W 1018 MB. WITHIN 360 NM SW
QUADRANT WINDS TO 25 KT. SEAS TO 3 M.
...GALE WARNING...
.24 HOUR FORECAST NEW LOW 49N127W 1009 MB. WITHIN 360 NM NW
QUADRANT WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW 49N125W 1009 MB. FROM 51N TO 53N E OF 133W
WINDS 25 TO 35 KT. SEAS TO 3.5 M. ELSEWHERE WITHIN 360 NM W AND
420 NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.SYNOPSIS AND FORECAST.
.48 HOUR FORECAST LOW 34N174W 1005 MB. S OF 37N W OF 172W WINDS
TO 25 KT. SEAS TO 3 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF 56N W OF 173W.
.24 HOUR FORECAST DENSE FOG N OF 55N W OF 176W AND FROM 40N TO
53N BETWEEN 165W AND 176W.
.48 HOUR FORECAST DENSE FOG N OF 47N W OF 170W.
.LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 177W.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 58N W OF
173W.
.48 HOUR FORECAST LITTLE CHANGE.
.FORECASTER ROWLAND. OCEAN PREDICTION CENTER.
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 MON APR 20.
24 HOUR FORECAST VALID 0600 UTC TUE APR 21.
48 HOUR FORECAST VALID 0600 UTC WED APR 22.
.WARNINGS.
...GALE WARNING...
.WITHIN 16N94.5W TO 16N95W TO 15.5N95.5W TO 15.5N95W TO
15.5N94.5W TO 16N94.5W...INCLUDING THE GULF OF TEHUANTEPEC...N
WINDS 30 TO 35 KT. SEAS 2.5 TO 3.0 M. ELSEWHERE WITHIN 15N94W TO
15N96W TO 14N96W TO 14N95W TO 15N94W...INCLUDING THE GULF OF
TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.12 HOUR FORECAST WITHIN 15N94W TO 16N95W TO 12N99W TO 12N96W TO
13N94W TO 15N94W...INCLUDING THE GULF OF TEHUANTEPEC...NE WINDS
20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N96W TO 14N96W TO
14N95W TO 15N94W TO 16N94W...INCLUDING THE GULF OF
TEHUANTEPEC...N WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.39 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.SYNOPSIS AND FORECAST.
.WITHIN 30N135W TO 30N140W TO 29N140W TO 29N136W TO 30N135W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO N SWELL.
.24 HOUR FORECAST WITHIN 30N128W TO 30N140W TO 26N140W TO
27N135W TO 30N128W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.5 M IN NW
TO N SWELL.
.48 HOUR FORECAST WITHIN 30N119W TO 30N140W TO 19N140W TO
22N130W TO 30N119W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW
TO N SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 0800 UTC MON APR 20...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
A SURFACE TROUGH EXTENDS FROM A LOW PRESSURE IN NORTHWEST
COLOMBIA TO 08N82W TO A 1010 MB LOW PRESSURE NEAR 06N95W AND TO
03.5N111W. ITCZ FROM 03.5N111W TO 05N125W TO AND TO BEYOND
04N140W. SCATTERED MODERATE FROM 02N TO 08N BETWEEN 87W AND 97W.
SCATTERED MODERATE FROM 00N TO 08N BETWEEN 112W AND 135W.
$$
.FORECASTER KRV. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 0600 UTC APR 20 2026.
24 HOUR FORECAST VALID 0600 UTC APR 21 2026.
48 HOUR FORECAST VALID 0600 UTC APR 22 2026.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.LOW NEAR 28N161W 1016 MB MOVING E 15 KT. FRONT FROM LOW TO
26N157W 26N154W 24N150W 24N142W 25N140W. FRONT MOVING S SLOWLY E
OF 150W AND NEARLY STATIONARY ELSEWHERE. TROUGH FROM LOW TO
25N166W NEARLY STATIONARY. E TO SE WINDS 20 TO 25 KT WITHIN 180 NM
N OF FRONT W OF 150W. SCATTERED TO NUMEROUS MODERATE TO STRONG
TSTMS WITHIN 180 NM S OF TROUGH...AND WITHIN 90 NM EITHER SIDE OF
FRONT W OF 157W.
.24 HOUR FORECAST LOW NEAR 28N154W 1014 MB. FRONT FROM LOW TO
24N152W 22N149W 21N144W 22N140W. TROUGH FROM LOW TO 27N160W. E TO
SE WINDS 20 TO 30 KT WITHIN 120 NM N OF TROUGH...LOW...AND FRONT
BETWEEN 157W AND 150W.
.48 HOUR FORECAST LOW NEAR 28N151W 1015 MB. FRONT FROM LOW TO
28N148W 27N146W. TROUGH FROM LOW TO 25N154W. E TO NE WINDS 20 TO
30 KT WITHIN 120 NM N OF TROUGH...LOW...AND FRONT BETWEEN 154W
AND 148W.
.TROUGH 29N168W 20N171W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH DISSIPATED.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 2.5 TO 3 M N OF LINE 22N180W 30N173W...AND N OF 29N E OF
145W.
.24 HOUR FORECAST SEAS 2.5 TO 4 M N OF LINE 30N165W 24N140W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF LINE 25N180W 30N177W...AND
N OF LINE 30N164W 19N150W 17N140W.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.ITCZ 04N140W 05N145W 04N147W 03N153W 02N157W. ISOLATED TO
SCATTERED MODERATE TSTMS WITHIN 120 NM EITHER SIDE OF ITCZ.
.SCATTERED MODERATE TSTMS FROM 05N TO 11N W OF 173W.
$$
.FORECASTER JELSEMA. HONOLULU HI.=