778 

FZPN02 KWBC 180525
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0545 UTC SAT APR 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC APR 18.
24 HOUR FORECAST VALID 0000 UTC APR 19.
48 HOUR FORECAST VALID 0000 UTC APR 20.

.WARNINGS.

...STORM WARNING...
.LOW 52N174E 968 MB MOVING NE 10 KT. FROM 48N TO 57N W OF 174W
WINDS 35 TO 50 KT. SEAS 4 TO 7 M. ELSEWHERE N OF 42N W OF 168W
WINDS 25 TO 40 KT. SEAS 2.5 TO 6 M...HIGHEST NEAR 46N180W.
.24 HOUR FORECAST LOW 56N178E 962 MB. WITHIN 360 NM SW AND NW
SEMICIRCLES WINDS 35 TO 50 KT. SEAS 4 TO 8.5 M. ELSEWHERE N OF
40N W OF 157W WINDS 25 TO 40 KT. SEAS 2.6 TO 6.5 M...HIGHEST NEAR
48N180W AND 50N170W. ALSO S OF 40N W OF 171W WINDS TO 25 KT. SEAS
2.5 TO 5 M.
.48 HOUR FORECAST LOW 58N177W 979 MB. ACROSS THE BERING SEA WINDS
25 TO 40 KT. SEAS 4 TO 8 M. ELSEWHERE N OF A LINE FROM 44N180W TO
57N146W WINDS 20 TO 30 KT. SEAS 2.5 TO 6 M. ALSO N OF A LINE FROM
30N180W TO 53N145W WINDS LESS THAN 25 KT. SEAS 2.5 TO 4.5 M.

...GALE WARNING...
.LOW W OF AREA NEAR 38N173E 992 MB MOVING NE 40 KT. FROM 32N TO
42N
W OF 171W WINDS 25 TO 35 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 56N178E
DESCRIBED ABOVE.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 49N142W 1004 MB MOVING SE 05 KT
AND A SECOND CENTER 39N141W 1013 MB MOVING NE 25 KT. FROM 34N TO
53N BETWEEN 130W AND 155W WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 48N139W 996 MB.
WITHIN 480 NM W SEMICIRCLE WINDS 25 TO 40 KT. SEAS 3 TO 6.5 M.
ELSEWHERE FROM 32N TO 56N BETWEEN 126W AND 153W WINDS 20 TO 30
KT. SEAS TO 4 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 41N137W 999 MB.
FROM 32N TO 50N BETWEEN 136W AND 150W WINDS 25 TO 40 KT. SEAS 3
TO 7 M...HIGHEST JUST W OF CENTER. ELSEWHERE S OF 52N BETWEEN
125W AND 151W WINDS TO 25 KT. SEAS 2.5 TO 4.5 M...HIGHEST JUST E
OF CENTER.

...HEAVY FREEZING SPRAY WARNING...
.LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 174W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 60N
W OF 177W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF
59N W OF 174W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 60N W OF
177W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY W AND NW OF A
LINE FROM 56N177E TO 60N175W.

.SYNOPSIS AND FORECAST.

...STORM WARNING...
.LOW 52N174E 968 MB MOVING NE 10 KT. FROM 48N TO 57N W OF 174W
WINDS 35 TO 50 KT. SEAS 4 TO 7 M. ELSEWHERE N OF 42N W OF 168W
WINDS 25 TO 40 KT. SEAS 2.5 TO 6 M...HIGHEST NEAR 46N180W.
.24 HOUR FORECAST LOW 56N178E 962 MB. WITHIN 360 NM SW AND NW
SEMICIRCLES WINDS 35 TO 50 KT. SEAS 4 TO 8.5 M. ELSEWHERE N OF
40N W OF 157W WINDS 25 TO 40 KT. SEAS 2.6 TO 6.5 M...HIGHEST NEAR
48N180W AND 50N170W. ALSO S OF 40N W OF 171W WINDS TO 25 KT. SEAS
2.5 TO 5 M.
.48 HOUR FORECAST LOW 58N177W 979 MB. ACROSS THE BERING SEA WINDS
25 TO 40 KT. SEAS 4 TO 8 M. ELSEWHERE N OF A LINE FROM 44N180W TO
57N146W WINDS 20 TO 30 KT. SEAS 2.5 TO 6 M. ALSO N OF A LINE FROM
30N180W TO 53N145W WINDS LESS THAN 25 KT. SEAS 2.5 TO 4.5 M.

...GALE WARNING...
.LOW W OF AREA NEAR 38N173E 992 MB MOVING NE 40 KT. FROM 32N TO
42N
W OF 171W WINDS 25 TO 35 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 56N178E
DESCRIBED ABOVE.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 49N142W 1004 MB MOVING SE 05 KT
AND A SECOND CENTER 39N141W 1013 MB MOVING NE 25 KT. FROM 34N TO
53N BETWEEN 130W AND 155W WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 48N139W 996 MB.
WITHIN 480 NM W SEMICIRCLE WINDS 25 TO 40 KT. SEAS 3 TO 6.5 M.
ELSEWHERE FROM 32N TO 56N BETWEEN 126W AND 153W WINDS 20 TO 30
KT. SEAS TO 4 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 41N137W 999 MB.
FROM 32N TO 50N BETWEEN 136W AND 150W WINDS 25 TO 40 KT. SEAS 3
TO 7 M...HIGHEST JUST W OF CENTER. ELSEWHERE S OF 52N BETWEEN
125W AND 151W WINDS TO 25 KT. SEAS 2.5 TO 4.5 M...HIGHEST JUST E
OF CENTER.

...HEAVY FREEZING SPRAY WARNING...
.LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF 174W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 60N
W OF 177W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF
59N W OF 174W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 60N W OF
177W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY W AND NW OF A
LINE FROM 56N177E TO 60N175W.

.FORECASTER JOSEPH. 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 0000 UTC SAT APR 18.
24 HOUR FORECAST VALID 0000 UTC SUN APR 19.
48 HOUR FORECAST VALID 0000 UTC MON APR 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 30N118W TO 30N127W TO 28N125W TO 28N121W TO 28N119W TO
30N118W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO N SWELL.
.12 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.

CONVECTION VALID AT 0300 UTC SAT APR 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM NORTHWEST COLOMBIA SOUTHWESTWARD TO 07N90W
TO 05N110W. ITCZ FROM 05N110W TO 07N120W TO 05N140W. SECOND ITCZ
FROM 01.5S97W TO 03S140W. SCATTERED MODERATE FROM 04S TO 05N
BETWEEN 84W AND 106W. SIMILAR CONVECTION FROM 02.5N TO 09N
BETWEEN 116W AND 137W.

 .FORECASTER KRV. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W

SYNOPSIS VALID 0000 UTC APR 18 2026.
24 HOUR FORECAST VALID 0000 UTC APR 19 2026.
48 HOUR FORECAST VALID 0000 UTC APR 20 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N148W 27N151W THENCE TROUGH 24N155W MOVING E 15 KT.
.24 HOUR FORECAST FRONT 30N140W 28N146W 27N149W. TROUGH
DISSIPATED.
.48 HOUR FORECAST FRONT MOVED E OF AREA.

.TROUGH 25N169W 21N170W 13N172W NEARLY STATIONARY. ISOLATED
MODERATE TSTMS FROM 27N TO 19N BETWEEN 169W AND 166W.
.24 HOUR FORECAST TROUGH 28N168W 20N171W 14N176W.
.48 HOUR FORECAST TROUGH 30N166W 26N165W 22N167W.

.48 HOUR FORECAST NEW TROUGH 30N178W 27N180W. SEAS 2.5 TO 3 M NW
OF LINE 30N174W 25N180W.

.WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA.

.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.

.ITCZ 05N140W 06N164W 06N180W. SCATTERED MODERATE
TSTMS WITHIN 270 NM OF ITCZ.

.ISOLATED MODERATE TSTMS FROM 25N TO 22N BETWEEN 163W AND 160W...
AND FROM 20N TO 18N BETWEEN 163W AND 160W.

$$

.FORECASTER TROTTER. HONOLULU HI.