East and Central North Pacific High Seas Forecast

FZPN02 KWBC 150525
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0545 UTC FRI AUG 15 2025 

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT 
TO 50N 160E 

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS 

SYNOPSIS VALID 0000 UTC AUG 15. 
24 HOUR FORECAST VALID 0000 UTC AUG 16. 
48 HOUR FORECAST VALID 0000 UTC AUG 17. 

.WARNINGS. 

...GALE WARNING... 
.COMPLEX LOW WITH FIRST CENTER 54N146W 1001 MB MOVING SE 15 KT 
AND BECOMING ABSORBED...AND SECOND CENTER 54N138W 999 MB MOVING 
SE 10 KT TURNING NE AFTER 12 HOURS. BETWEEN 90 NM AND 240 NM W 
QUADRANT OF FIRST LOW WINDS 25 TO 35 KT. SEAS TO 3 M. ALSO IN 
THE INSIDE PASSAGE FROM FROM 53N TO 54N WINDS 25 TO 35 KT. SEAS 
LESS THAN 2.5 M. ELSEWHERE WITHIN 300 NM W QUADRANT OF FIRST 
LOW...AND WITHIN AN AREA BOUNDED BY A LINE FROM FIRST LOW CENTER 
TO 51N134W TO 44N135W TO 45N157W TO 52N157W TO FIRST LOW CENTER 
WINDS 20 TO 30 KT. SEAS TO 3.5 M. ALSO WITHIN 90 NM NE AND E OF 
A FRONT FROM 55N137W TO 53N131W TO 49N128W WINDS 20 TO 30 KT. 
SEAS TO 2.5 M.
.24 HOUR FORECAST COMBINED LOW 53N133W 991 MB. WITHIN 90 NM 
EITHER SIDE OF A LINE FROM 52N140W TO 49N135W WINDS 25 TO 35 KT. 
SEAS TO 4.5 M. ELSEWHERE WITHIN AN AREA BOUNDED BY A LINE FROM 
46N130W TO 43N137W TO 53N154W TO 57N146W TO 55N138W TO 50N130W 
TO 46N130W WINDS 20 TO 30 KT. SEAS TO 4 M. ALSO BETWEEN A LINE 
FROM 54N133W TO 51N129W AND THE BRITISH COLUMBIA COAST WINDS 20 
TO 30 KT. SEAS TO 2.5 M. ELSEWHERE WITHIN AN AREA BOUNDED BY A 
LINE FROM 48N123W TO 41N131W TO 41N144W TO 52N158W TO 57N146W TO 
52N129W TO 48N123W WINDS LESS THAN 25 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST LOW 56N135W 996 MB. WITHIN 240 NM S AND SE 
QUADRANTS...AND WITHIN 180 NM EITHER SIDE OF A LINE FROM 55N150W 
TO 49N138W...WINDS 20 TO 30 KT. SEAS TO 4 M. ELSEWHERE WITHIN AN 
AREA BOUNDED BY A LINE FROM LOW CENTER TO 47N122W TO 40N128W TO 
40N136W TO 51N156W TO 58N145W TO LOW CENTER WINDS TO 24 KT. SEAS 
TO 4 M.

...GALE WARNING... 
.BETWEEN A LINE FROM 53N160W TO 56N153W AND THE ALASKA 
COAST...AND IN THE BERING SEA N OF 57N E OF 162W...AREA OF NW 
WINDS 20 TO 30 KT. SEAS LESS THAN 2.5 M.
.12 HOUR FORECAST BETWEEN A LINE FROM 54N156W 59N148W AND THE 
ALASKA COAST AREA OF NW WINDS 25 TO 35 KT. SEAS TO 3 M.
.24 HOUR FORECAST BETWEEN A LINE FROM 52N158W TO 57N146W AND THE 
ALASKA COAST AREA OF NW WINDS 25 TO 40 KT. SEAS TO 4 M.
.48 HOUR FORECAST BETWEEN A LINE FROM 51N156W TO 58N145W AND THE 
ALASKA COAST AREA OF NW WINDS 25 TO 35 KT. SEAS TO 4 M.

.SYNOPSIS AND FORECAST. 

.LOW 35N176E 1010 MB MOVING N 10 KT. WITHIN 180 NM NW...NE...AND 
E OF A LINE FROM LOW CENTER TO 36N178E TO 34N179W TO 30N179E 
WINDS 20 TO 30 KT. SEAS TO 3.5 M. ELSEWHERE FROM 30N TO 38N 
BETWEEN 174E AND 174W WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 38N174E 1011 MB. WITHIN 540 NM E QUADRANT 
WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST LOW 44N174E 1014 MB. FROM 39N TO 45N BETWEEN 
174E AND 178W WINDS LESS THAN 25 KT. SEAS TO 2.5 M. 

.LOW 49N175E 1015 MB MOVING N 10 KT. FROM 48N TO 52N BETWEEN 
172E AND 179W WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 51N176E 1017 MB. CONDITIONS DIMINISHED. 

.FROM 35N TO 40N E OF 126W AREA OF N TO NW WINDS 20 TO 30 KT. 
SEAS TO 3 M.
.24 HOUR FORECAST WITHIN AN AREA BOUNDED BY A LINE FROM 32N122W 
TO 34N126W TO 40N124W TO 35N120W TO 32N122W AREA OF NW WINDS 20 
TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.WITHIN 180 NM EITHER SIDE OF A LINE FROM 29N160W TO 37N150W 
AREA OF NE WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST CONDITIONS DIMINISHED.

.KLYUCHEVSKOY VOLCANO 56.03N 160.38E HAS ERUPTED. VOLCANIC ASH 
MAY BE REACHING THE SURFACE WITHIN 90 NM EITHER SIDE OF A LINE 
FROM 54N179E TO 51N170E TO 49N165E. MARINERS SHOULD EXERCISE 
CAUTION. IF MARINERS ENCOUNTER VOLCANIC ASH OR FLOATING VOLCANIC 
DEBRIS IN AND NEAR VICINITY YOU ARE ENCOURAGED TO REPORT THE 
OBSERVATION TO THE OCEAN PREDICTION CENTER BY CALLING 
301-683-1520. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN AN AREA 
BOUNDED BY A LINE FROM 45N144W TO 42N166W TO 42N172E TO 50N175E 
TO 47N145W.
.24 HOUR FORECAST DENSE FOG WITHIN AN AREA BOUNDED BY A LINE 
FROM 42N165W TO 43N172E TO 55N177E TO 53N175W TO 42N165W...AND E 
OF A LINE FROM 49N127W TO 46N125W TO 40N126W.
.48 HOUR FORECAST DENSE FOG WITHIN AN AREA BOUNDED BY A LINE 
FROM 43N164W TO 43N171E TO 52N178E TO 55N169W TO 50N162W...AND 
WITHIN 90 NM OF THE CALIFORNIA COAST FROM 37N TO 41N.

.FORECASTER CONNELLY. 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 0000 UTC FRI AUG 15.
24 HOUR FORECAST VALID 0000 UTC SAT AUG 16.
48 HOUR FORECAST VALID 0000 UTC SUN AUG 17.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 12N87W TO 13N88W TO 12N90W TO 10N90W TO 10N88W TO
12N87W...INCLUDING THE GULF OF PAPAGAYO... E TO SE WINDS 20 TO
25 KT. SEAS LESS THAN 2.5 M.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.12 HOUR FORECAST WITHIN 29N112W TO 31N113W TO 31N114W TO
29N113W TO 27N111W TO 27N110W TO 29N112W...INCLUDING THE GULF OF
CALIFORNIA... SE TO S WINDS 20 TO 30 KT. SEAS LESS THAN 2.5 M.
.24 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 FRI AUG 15...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 10N85W TO 08N92W TO 14N105W TO
10N120W TO BEYOND 08N140W. SCATTERED MODERATE FROM 04N TO 06N 
WEST OF 78W...AND FROM 06N TO 09N BETWEEN 86W AND 89W. SCATTERED
MODERATE TO ISOLATED STRONG FROM 07N TO 11N BETWEEN 92W AND 98W.
SCATTERED MODERATE FROM 13N TO 15N BETWEEN 109W AND 113W.

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 0000 UTC AUG 15 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 16 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 17 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N145W 25N150W 23N152W MOVING NE 15 KT.
.24 HOUR FORECAST TROUGH 27N152W 30N150W.
.48 HOUR FORECAST TROUGH MOVED N OF AREA.

.FRONT 30N178E 25N175E THENCE TROUGH 24N170E 25N165E
MOVING W 5 KT. WINDS 20 TO 25 KT AND SEAS 2.4 TO 4 M
WITHIN 120 NM E OF FRONT N OF 25N. SCATTERED MODERATE
TSTMS WITHIN 150 NM OF FRONT N OF 25N.
.24 HOUR FORECAST FRONT 30N178E 25N175E THENCE TROUGH 24N173E.
.48 HOUR FORECAST FRONT MOVED N OF AREA. TROUGH 29N177E
23N173E.

.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 2.5 M OR LOWER REMAINDER OF FORECAST AREA.

.MONSOON TROUGH 12N140W 10N145W.

ITCZ 10N155W 09N160W 09N165W 05N170W 09N176W. SCATTERED
MODERATE TSTMS WITHIN 180 NM OF ITCZ.

$$

.FORECASTER PECHACEK. HONOLULU HI.