HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1745 UTC THU APR 16 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC APR 16.
24 HOUR FORECAST VALID 1200 UTC APR 17.
48 HOUR FORECAST VALID 1200 UTC APR 18.
.WARNINGS.
...STORM WARNING...
.18 HOUR FORECAST LOW W OF AREA NEAR 46N170E 988 MB. FROM 38N TO
48N BETWEEN 180W AND 177W WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 48N172E 983 MB. WITHIN 360 NM SE QUADRANT
WINDS 35 TO 50 KT. SEAS 4 TO 6 M. ELSEWHERE FROM 42N TO 51N
BETWEEN 180W AND 175W WINDS 25 TO 40 KT. SEAS 3 TO 5 M. ALSO
FROM 36N TO 52N BETWEEN 180W AND 172W WINDS 20 TO 30 KT. SEAS
2.5 TO 3.5 M.
.48 HOUR FORECAST LOW 54N179E 970 MB. WITHIN 180 NM SE
SEMICIRCLE...AND BETWEEN 90 NM AND 240 NM N AND NE QUADRANTS
WINDS 35 TO 50 KT. SEAS 5 TO 8 M. ELSEWHERE W OF A LINE FROM
45N164W TO 51N159W TO 61N173W WINDS 25 TO 40 KT. SEAS 4 TO 7 M.
ALSO FROM 45N TO 65N BETWEEN 180W AND 160W WINDS 20 TO 30 KT.
SEAS 3 TO 6 M.
...GALE WARNING...
.LOW 43N150W 1012 MB MOVING NE 20 KT. WITHIN 480 NM NE AND 660
NM SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 47N143W 1009 MB. WITHIN 420 NM NE...660
NM SE...AND BETWEEN 240 NM AND 600 NM W AND SW QUADRANTS WINDS
20 TO 30 KT. SEAS TO 3 M.
.36 HOUR FORECAST LOW 49N142W 1002 MB. WITHIN 360 NM NE...AND
BETWEEN 120 NM AND 540 NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS
2.5 TO 4 M.
.48 HOUR FORECAST LOW 49N140W 995 MB. BETWEEN 180 NM AND 420 NM
E AND NE SEMICIRCLES...AND WITHIN 540 NM SW AND 360 NM NW
QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M. ELSEWHERE FROM
35N TO 55N BETWEEN 153W AND 128W WINDS 20 TO 30 KT. SEAS 2.5 TO
4 M.
...GALE WARNING...
.48 HOUR FORECAST LOW W OF AREA NEAR 38N177E 995 MB. WITHIN 480
NM NE AND 360 NM SE QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO 5.5
M. ELSEWHERE FROM 30N TO 45N BETWEEN 180W AND 164W WINDS 20 TO
30 KT. SEAS 2.5 TO 3.5 M.
.SYNOPSIS AND FORECAST.
.FROM 31N TO 51N E OF 131W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST FROM 30N TO 44N E OF 128W WINDS 20 TO 30 KT.
SEAS 2.5 TO 3.5 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.
.LOW 58N172W 1001 MB MOVING E 10 KT WILL TURN NE AFTER 24
HOURS. WITHIN 300 NM E AND NE OF A FRONT EXTENDING FROM
49N159W TO 57N155W...WITHIN 780 NM S AND SW AND 300 NM NW
QUADRANTS WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW 58N166W 1010 MB. BETWEEN 120 NM AND 480
NM S AND SW QUADRANTS WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW MOVED INLAND OVER ALASKA WITH CONDITIONS
DESCRIBED WITH LOW 54N179E IN WARNINGS SECTION ABOVE.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 35N TO 45N
BETWEEN 151W AND 142W...AND FROM 56N TO 63N BETWEEN 180W AND
151W.
.24 HOUR FORECAST DENSE FOG FROM 40N TO 47N BETWEEN 134W AND
141W...FROM 51N TO 61N BETWEEN 156W AND 134W...FROM 56N TO
65N BETWEEN 177W AND 160W...AND FROM 46N TO 52N BETWEEN 180W
AND 173W.
.48 HOUR FORECAST FROM 37N TO 61N BETWEEN 149W AND 130W...FROM
52N TO 62N BETWEEN 180W AND 159W...AND FROM 43N TO 49N BETWEEN
180W AND 175W.
.LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 169W.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 57N
W OF 172W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 59N
W OF 172W.
.FORECASTER MILLS. 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 1200 UTC THU APR 16.
24 HOUR FORECAST VALID 1200 UTC FRI APR 17.
48 HOUR FORECAST VALID 1200 UTC SAT APR 18.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.12 HOUR FORECAST WITHIN 31N113.5W TO 31N114W TO 30.5N114.5W TO
30.5N113.5W TO 30.5N113W TO 31N113.5W...INCLUDING THE GULF OF
CALIFORNIA...S TO SW WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 30N119W TO 30N125W TO 29N124W TO
29N122W TO 30N119W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN NW
TO N SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.12 HOUR FORECAST WITHIN 23N109W TO 23N110W TO 22N110W TO
22N109W TO 23N109W...INCLUDING WITHIN 60 NM OF CABO SAN
LUCAS...NW WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 1200 UTC THU APR 16...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH EXTENDS FROM 07N78W TO 06N94W TO 05N116W. ITCZ EXTENDS
FROM 05N116W TO 06N133W TO 05N140W. SCATTERED MODERATE ISOLATED
STRONG FROM 04N TO 09N BETWEEN 109W AND 118W AND WITHIN 30 NM OF
TROUGH BETWEEN 105W AND 108W. SCATTERED MODERATE WITHIN 120 NM N
OF THE ITCZ BETWEEN 124W AND 129W.
$$
.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 1200 UTC APR 16 2026.
24 HOUR FORECAST VALID 1200 UTC APR 17 2026.
48 HOUR FORECAST VALID 1200 UTC APR 18 2026.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.FRONT 30N155W THENCE TROUGH TO 22N162W. FRONT AND THROUGH
MOVING NE 10 KT.
.24 HOUR FORECAST FRONT N OF AREA. TROUGH 30N152W 25N158W.
.48 HOUR FORECAST TROUGH DISSIPATED.
.48 HOUR FORECAST NEW TROUGH 25N163W 22N168W.
.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 25N TO 21N BETWEEN
159W AND 161W.
.WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA.
.SEAS 2.5 M OR LOWER OVER ENTIRE FORECAST AREA.
.ITCZ 06N140W 03N158W. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF ITCZ.
.SCATTERED MODERATE TSTMS FROM 08N TO 03N W OF 166W.
$$
.FORECASTER THOMAS. HONOLULU HI.=