East and Central North Pacific High Seas Forecast

FZPN02 KWBC 182325
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2345 UTC SAT OCT 18 2025

CCODE/2:31:12:01:00/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

PLEASE SEE PROPOSAL TO ALIGN NWS PACIFIC HIGH SEAS FORECASTS WITH
METAREA XII:  HTTPS://OCEAN.WEATHER.GOV/HIGHSEASPACIFICPROPOSAL/
(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 1800 UTC OCT 18. 
24 HOUR FORECAST VALID 1800 UTC OCT 19.
48 HOUR FORECAST VALID 1800 UTC OCT 20.

.WARNINGS.

...HURRICANE FORCE WIND WARNING... 
.COMPLEX LOW WITH MAIN CENTER 45N178E 980 MB MOVING NE 35 KT AND
RAPIDLY INTENSIFYING. WITHIN 240 NM SE AND 120 NM SW QUADRANTS
WINDS 50 TO 60 KT. SEAS 3.5 TO 7 M. ELSEWHERE FROM 38N TO 49N
BETWEEN 169W AND 176E AND WINDS 35 TO 50 KT. SEAS 2.5 TO 6
M...HIGHEST NEAR 42N177E. ALSO FROM 36N TO 50N BETWEEN 166W AND
171E AND WITHIN 240 NM SE OF A LINE FROM 38N171E TO 31N160E WINDS
25 TO 35 KT. SEAS 2.5 TO 4.5 M. 
.06 HOUR FORECAST LOW 47N174E 965 MB. WITHIN 300 NM SE AND 180 NM
S QUADRANTS WINDS 60 TO 75 KT. SEAS 4.5 TO 9 M.
.24 HOUR FORECAST LOW 52N159W 966 MB. WITHIN 300 NM S QUADRANT
WINDS 50 TO 65 KT. SEAS 9 TO 15 M. ALSO FROM 44N TO 56N BETWEEN
147W AND 171W WINDS 35 TO 50 KT. SEAS 3.5 TO 9 M...HIGHEST SW OF
LOW CENTER. ELSEWHERE WITHIN 360 NM NE...660 NM SE...540 NM
SW...AND 480 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO 7 M. 
.48 HOUR FORECAST LOW 56N142W 977 MB. WITHIN 420 NM S QUADRANT
WINDS 35 TO 45 KT. SEAS 4.5 TO 10.5 M...HIGHEST NEAR 51N140W.
ALSO N OF 47N BETWEEN 128W AND 155W WINDS 25 TO 40 KT. SEAS 4.5
TO 9 M. ELSEWHERE N OF A LINE FROM 34N166W TO 37N150W TO 50N128W
WINDS TO 25 KT. SEAS 2.5 TO 5 M. HIGHEST SW OF LOW. 

...STORM WARNING... 
.COMPLEX LOW WITH MAIN CENTER 51N141W 982 MB MOVING E 25 KT.
FRONT EXTENDS FROM 53N130W TO 49N127W. WITHIN 420 NM SW QUADRANT
AND WITHIN 90 NM NE OF FRONT WINDS 25 TO 50 KT. SEAS 5.5 TO 10.5
M...HIGHEST S OF LOW. ALSO FROM 42N TO 58N BETWEEN 126W AND 155W
WINDS 25 TO 40 KT. SEAS 4 TO 8 M...HIGHEST S AND SW OF LOW.
ELSEWHERE FROM 39N TO 59N BETWEEN 124W AND 171W WINDS 20 TO 30
KT. SEAS 2.5 TO 5 M...HIGHEST S AND SW OF LOW.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 49N124W 1005 MB.
WITHIN 600 NM SE QUADRANT WINDS 20 TO 30 KT. SEAS 4.5 TO 9 M.
ELSEWHERE FROM 35N TO 58N E OF 155W WINDS TO 25 KT. SEAS 2.5 TO
5.5 M IN MIXED SWELL. 
.48 HOUR FORECAST LOW WELL INLAND. FROM 34N TO 43N BETWEEN 124W
AND 130W WINDS 20 TO 30 KT. SEAS 3 TO 5.5 M IN MIXED SWELL.
ELSEWHERE S OF 46N BETWEEN 120W AND 141W WINDS TO 25 KT. SEAS 2.5
TO 4 M. 

...STORM WARNING... 
.24 HOUR FORECAST LOW 49N166E 984 MB. WITHIN 300 NM S AND 180 NM
NW QUADRANTS AND WITHIN WITHIN 120 NM SE OF A LINE FROM 49N173E
TO 45N172E TO 41N168E WINDS 45 TO 60 KT. SEAS 5.5 TO 9 M. ALSO
FROM 41N TO 52N W OF 176E WINDS 35 TO 45 KT. SEAS 3 TO 6 M.
ELSEWHERE FROM 39N TO 55N W OF 179E WINDS 25 TO 35 KT. SEAS 2.5
TO 5 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 51N172W 987 MB.
FROM 43N TO 50N BETWEEN 162W AND 174E WINDS 35 TO 50 KT. SEAS 5.5
TO 11 M. ALSO FROM 41N TO 56N BETWEEN 158W AND 169W WINDS 25 TO
40 KT. SEAS 4 TO 8 M. ELSEWHERE FROM 37N TO 57N W OF 164W WINDS
20 TO 30 KT. SEAS 2.5 TO 5 M...HIGHEST S AND SW OF LOW.

.SYNOPSIS AND FORECAST.

. S OF 44N BETWEEN 122W AND 142W WINDS TO 25 KT. SEAS 2.5 TO 3.5
M.
.24 HOUR FORECAST CONDITIONS DIMINISHED.

.24 HOUR FORECAST LOW NW OF AREA NEAR 65N172W 1002 MB. WITHIN 180
NM E QUADRANT WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LOW AND CONDITIONS WELL N OF AREA.

.48 HOUR FORECAST LOW W OF AREA NEAR 47N158E 1005 MB. FROM 36N TO
48N W OF 169W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 60 NM NE OF A
LINE FROM 53N175W TO 48N179W TO 47N175W.
.24 HOUR FORECAST DENSE FOG WITHIN 90 NM N OF A LINE FROM 50N162E
TO 51N167E TO 50N174E AND WITHIN 60 NM E OF A LINE FROM 64N171W
TO 54N171W.
.48 HOUR FORECAST DENSE FOG WITHIN 60 NM N OF A LINE FROM 53N179W
TO 53N170W.

.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 1800 UTC SAT OCT 18.
24 HOUR FORECAST VALID 1800 UTC SUN OCT 19.
48 HOUR FORECAST VALID 1800 UTC MON OCT 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 30N128W TO 30N140W TO 20N140W TO 30N128W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN NW SWELL.
.24 HOUR FORECAST WITHIN 30N120W TO 29N134W TO 28N131W TO
29N128W TO 29N124W TO 30N120W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN NW SWELL.
.48 HOUR FORECAST WITHIN 30N128W TO 30N140W TO 28N140W TO
27N137W TO 28N134W TO 30N128W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN NW TO N SWELL.

.36 HOUR FORECAST WITHIN 12N119W TO 12N120W TO 12N122W TO
10N122W TO 10N121W TO 10N120W TO 12N119W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN NW SWELL.
.48 HOUR FORECAST WITHIN 13N122W TO 13N124W TO 12N125W TO
10N125W TO 10N123W TO 11N121W TO 13N122W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN NW SWELL.

.42 HOUR FORECAST WITHIN 16N95W TO 16N96W TO 15N96W TO 15N95W TO
16N95W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20
TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 2030 UTC SAT OCT 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 08N82W TO 1008 MB LOW PRES NEAR 
14N98W TO 11N123W. SURFACE TROUGH ALONG 126W. ITCZ FROM 12N127W 
TO BEYOND 08N140W. SCATTERED MODERATE TO ISOLATED STRONG 
N OF 08N BETWEEN 87W AND 105W. SIMILAR ACTIVITY FROM 08N TO 13N 
AND W OF 109W.

.FORECASTER ERA. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI

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

SYNOPSIS VALID 1800 UTC OCT 18 2025.
24 HOUR FORECAST VALID 1800 UTC OCT 19 2025.
48 HOUR FORECAST VALID 1800 UTC OCT 20 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N168E 26N163E MOVING NE 15 KT.
.24 HOUR FORECAST FRONT WEAKENING TO TROUGH 30N172E 27N170E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 13N166E 06N166E MOVING W 15 KT.
.24 HOUR FORECAST TROUGH 14N162E 10N160E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.24 HOUR FORECAST NEW TROUGH 13N145W 10N144W 08N150W.
.48 HOUR FORECAST TROUGH 11N150W 08N153W 08N153W.

.WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA.

.SEAS 2.5 TO 4 M N OF LINE 26N160E 30N165E. SEAS 2.5 TO 3 M
N OF 20N E OF 165W.
.24 HOUR FORECAST SEAS 2.5 TO 4 M N OF LINE 20N160E
30N175E...AND N OF 23N BETWEEN 155W AND 170W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF 23N BETWEEN 175W AND
178E...AND FROM 15N TO 25N W OF 164E.

.SEAS 2.5 M OR LESS OVER REMAINDER FORECAST AREA.

.ITCZ 10N140W 06N150W 07N160W 05N174W. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF ITCZ.

.SCATTERED MODERATE TSTMS FROM 23N TO 27N BETWEEN 162W AND
167W...AND FROM 05N TO 10N BETWEEN 170W AND 175E. ISOLATED
MODERATE TSTMS WITH 90 NM OF POINT 08N163E.

$$

.FORECASTER PECHACEK. HONOLULU HI.