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ean.weather.gov/contact/index.php https://ocean.weather.gov/images/xml_logo_opc.gif https://ocean.weather.gov/ NOAA logo OPC High Seas Forecast (N Pacific) 95 45 OPC N Pacific High Seas Forecast HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC SUN OCT 12 2025

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

FROM OCTOBER 15 TO APRIL 1, DUE TO THE CLIMATOLOGY OF THE NORTH
PACIFIC AND THE FREQUENCY AND VOLUME OF WEATHER HAZARDS, ALONG
WITH CUSTOMER FEEDBACK, HIGH SEAS FORECASTS WILL BE LIMITED TO
WINDS OF 25 TO 35 KNOTS AND HIGHER, AND SEAS OF 4 METERS OR
GREATER, ALONG WITH FREEZING SPRAY, DENSE FOG, VOLCANIC ASH,
AND ANYTHING TROPICAL (INCLUDING A DEPRESSION). LESSER
CONDITIONS WILL BE INCLUDED FOR WARNING CONDITIONS AND TO
PRESERVE CONTINUITY WHERE APPROPRIATE.

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 12.
24 HOUR FORECAST VALID 1800 UTC OCT 13.
48 HOUR FORECAST VALID 1800 UTC OCT 14.

.WARNINGS.

...HURRICANE FORCE WIND WARNING...
.06 HOUR FORECAST LOW W OF THE AREA 39N156E 1006 MB. FROM 35N TO
40N W OF 163E WINDS 25 TO 35 KT. SEAS 3 TO 4 M.
.24 HOUR FORECAST LOW 42N170E 996 MB. WITHIN 300 NM SE AND 480 NM
SW QUADRANTS WINDS 35 TO 45 KT. SEAS 3.5 TO 5.5 M. ELSEWHERE FROM
34N TO 45N W OF 178E WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M. ALSO
FROM 30N TO 45N W OF 178E WINDS TO 25 KT. SEAS TO 3.5 M
.30 HOUR FORECAST LOW 44N175E 986 MB. WITHIN 240 NM NE...360 NM
SE...480 NM SW AND 240 NM NW QUADRANTS WINDS 35 TO 50 KT. SEAS 4
TO 6 M.
.42 HOUR FORECAST LOW 50N177W 952 MB. BETWEEN 60 NM AND 180 NM
NE...WITHIN 300 NM SE...180 NM S AND 360 NM SW QUADRANTS WINDS 50
TO 65 KT. SEAS 5 TO 9 M...HIGHEST NEAR 48N177W.
.48 HOUR FORECAST LOW 51N176W 952 MB. WITHIN 120 NM SE...300 NM S
AND SW QUADRANTS WINDS 50 TO 65 KT. SEAS 6.5 TO 10 M...HIGHEST
NEAR 50N175W. ELSEWHERE WITHIN 360 NM NE...660 NM SE...420 NM
S...660 NM SW AND 180 NM NW QUADRANTS WINDS 35 TO 50 KT. SEAS 4
TO 7 M...HIGHEST SW QUADRANT...EXCEPT SEAS 2.5 TO 5 M N OF THE
ALEUTIAN ISLANDS. ALSO WITHIN 540 NM NE...840 NM SE...960 NM
S...1020 NM SW AND 480 NM NW QUADRANTS WINDS 25 TO 35 KT. SEAS
2.5 TO 5.5 M...EXCEPT SEAS TO 3 M N OF THE ALEUTIAN ISLANDS.

...STORM WARNING...
.LOW 65N165W 964 MB MOVING NE 25 KT. BETWEEN 60 NM AND 120 NM SE
AND BETWEEN 90 NM AND 240 NM S AND SW QUADRANTS WINDS 45 TO 60
KT. SEAS 3 TO 7 M. ELSEWHERE BETWEEN 60 NM AND 240 NM S...60 NM
AND 240 NM SW AND 60 NM AND 120 NM NW QUADRANTS WINDS 35 TO 50
KT. SEAS 3 TO 5 M. ALSO WITHIN 360 NM SW QUADRANT AND N OF 53N N
OF THE ALEUTIAN ISLANDS E OF 170W WINDS 25 TO 35 KT. SEAS 2.5 TO
5 M...HIGHEST NEAR 59N166W.
.24 HOUR FORECAST LOW DISSIPATED WELL NE OF THE AREA. N OF 52N N
OF THE ALEUTIAN ISLANDS E OF 180W SEAS TO 25 KT. SEAS TO 3.5
M...MAINLY NEAR 52N.
.36 HOUR FORECAST CONDITIONS DIMINISHED.

...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 53N169E MOVING SE 20 KT THROUGH 12
HOURS THEN TURNING NE. BETWEEN 60 NM AND 660 NM SE...60 NM AND
600 NM S AND 60 NM AND 540 NM SW QUADRANTS OF MAIN LOW WINDS 35
TO 45 KT. SEAS 5 TO 7 M. ELSEWHERE FROM 40N TO 52N W OF 175W
WINDS 25 TO 35 KT. SEAS 3.5 TO 5.5 M. ALSO FROM 30N TO 52N W OF
175W WINDS TO 25 KT. SEAS 2.5 TO 4 M IN MIXED SWELL.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 54N179W 991 MB AND
A SECOND NEW CENTER 50N168E 987 MB. FROM 45N TO 50N W OF 175W AND
FROM 50N TO 52N BETWEEN 175W AND 170E WINDS 25 TO 40 KT. SEAS 3
TO 5.5 M.
.48 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED ABOVE
WITH LOW 51N176W.

...GALE WARNING...
.LOW 48N125W 1009 MB MOVING S 15 KT. WITHIN 360 NM S...480 NM SW
AND 540 NM NW QUADRANTS WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M
.24 HOUR FORECAST LOW 41N125W 1004 MB. BETWEEN 90 NM AND 300 NM
NW SEMICIRCLE WINDS 25 TO 40 KT. SEAS 3.5 TO 5 M. ELSEWHERE
WITHIN 360 NM S...600 NM W AND 480 NM NW QUADRANTS WINDS 20 TO 30
KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST LOW 37N123W 1008 MB. BETWEEN 90 NM AND 360 NM
SE...WITHIN 300 NM SW AND 780 NM NW AND N QUADRANTS WINDS 20 TO
30 KT. SEAS 2.5 TO 5 M IN MIXED SWELL.

...GALE WARNING...
.LOW 52N162W 1006 MB MOVING NE 30 KT. WITHIN 120 NM E AND SE OF A
FRONT FROM 50N162W TO 44N165W WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
ELSEWHERE WITHIN 780 NM NE...600 NM E...420 NM SE AND 720 NM S
QUADRANTS WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST LOW 60N147W 1001 MB. WITHIN 60 NM N AND NE OF A
LINE FROM 60N146W TO 58N138W AND BETWEEN 60 NM AND 360 NM SE...60
NM AND 1080 NM S AND BETWEEN 90 NM AND 480 NM SW QUADRANTS WINDS
20 TO 30 KT. SEAS 2.5 TO 4.5 M...HIGHEST NEAR 56N153W.
.48 HOUR FORECAST LOW MOVED INLAND OVER ALASKA AND DISSIPATED
WITH NEW LOW TO FORM NEAR 58N142W 1001 MB, WITHIN 180 NM E...360
NM S AND 240 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 3.5 M

...GALE WARNING...
.COMPLEX LOW WITH MEAN CENTER 33N149W 1018 MB NEARLY STATIONARY.
WITHIN 180 NM NE SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 3.5 M.
ELSEWHERE WITHIN 300 NM E...540 NM NW AND 300 NM N QUADRANTS
WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 35N158W 1018 MB.
WITHIN 180 NM NE OF A LINE FROM 38N154W TO 33N147W WINDS TO 25
KT. SEAS TO 3.5 M.
.48 HOUR FORECAST COMPLEX LOW DISSIPATED. FROM 30N TO 45N BETWEEN
148W AND 165W WINDS LESS THAN 25 KT. SEAS TO 2.5 M.

.SYNOPSIS AND FORECAST.

.LOW 33N119W 1007 MB NEARLY STATIONARY. FROM 30N TO 40N E OF 130W
WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DESCRIBED WITH
LOW 41N125W ABOVE IN WARNING SECTION.

.SATELLITE DATA AND A RECENT PILOT REPORT AT 2120Z SUGGEST THAT
ASH EMISSIONS FROM SHISHALDIN VOLCANO AT 55N164W HAS BEGUN WITH
THE POSSIBILITY THAT VOLCANIC ASH IS REACHING THE OCEAN SURFACE.
MARINERS SHOULD EXERCISE CAUTION. IF MARINERS ENCOUNTER VOLCANIC
ASH PLEASE REPORT THE OBSERVATION TO THE OCEAN PREDICTION CENTER
BY CALLING 301 683 1520.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N WITHIN 180 NM NW
OF A LINE FROM 45N163W TO 55N154W AND N OF 62N W OF ALASKA.
.24 HOUR FORECAST DENSE FOG WITHIN120 NM NW OF A LINE FROM
46N155W TO 54N147W AND N OF 65N W OF ALASKA. .
.48 HOUR FORECAST CONDITIONS IMPROVED.

.FORECASTER FUTTERMAN. 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 SUN OCT 12.
24 HOUR FORECAST VALID 1800 UTC MON OCT 13.
48 HOUR FORECAST VALID 1800 UTC TUE OCT 14.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 30N117W TO 30N126W TO 28N124W TO 27N120W TO 30N117W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO N SWELL.
.24 HOUR FORECAST WITHIN 30N118W TO 30N123W TO 28N121W TO
28N120W TO 30N118W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW
TO N SWELL.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
2.5 TO 3.0 M IN NW TO N SWELL.
.48 HOUR FORECAST COLD FRONT FROM 30N120W TO 29N125W TO 30N135W.
WITHIN 30N122W TO 30N132W TO 29N130W TO 29N126W TO 30N122W WINDS
20 KT OR LESS. SEAS 2.5 TO 4.5 M IN N SWELL.

.18 HOUR FORECAST WITHIN 31N113W TO 32N114W TO 31N115W TO
30N115W TO 30N114W TO 30N113W TO 31N113W...INCLUDING THE GULF OF
CALIFORNIA... S TO SW WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.42 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N96W TO 15N95W TO
16N94W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS 20
TO 30 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 2100 UTC SUN OCT 12...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 13N87W TO 1010 MB LOW PRESSURE NEAR 11N92W
TO 09N125W. ITCZ FROM 09N125W TO BEYOND 09N140W. SCATTERED
MODERATE FROM 11N TO 14N BETWEEN 92W AND 98W.

.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.

$$
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