764
FZPN01 KWBC 171559
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC FRI OCT 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC OCT 17.
24 HOUR FORECAST VALID 1200 UTC OCT 18.
48 HOUR FORECAST VALID 1200 UTC OCT 19.

.WARNINGS.

...HURRICANE FORCE WIND WARNING...
.COMPLEX LOW WITH MAIN CENTER 38N159E 1000 MB MOVING NE 35 KT.
FROM 37N TO 40N W OF 162E WINDS 40 TO 55 KT. SEAS 3 TO 5.5 M.
ELSEWHERE FROM 34N TO 41N W OF 166E WINDS 25 TO 40 KT. SEAS 2.5
TO 3.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 43N178E 990 MB.
FROM 40N TO 44N BETWEEN 177E AND 177W WINDS 40 TO 55 KT. SEAS 4
TO 6.5 M. ELSEWHERE FROM 36N TO 45N BETWEEN 175W AND 172E AND
WITHIN 300 NM W OF A LINE FROM 40N175E TO 35N170E TO 30N164E
WINDS 25 TO 40 KT. SEAS 2.5 TO 5.5 M.
.48 HOUR FORECAST COMBINED LOW 51N162W 965 MB. FROM 47N TO 51N
BETWEEN 159W AND 165W WINDS 50 TO 70 KT. SEAS 8 TO 13
M...HIGHEST NEAR 48N163W. ALSO FROM 46N TO 52N BETWEEN 157W AND
168W WINDS 40 TO 55 KT. SEAS 5 TO 10 M...HIGHEST S AND SW OF
LOW. ELSEWHERE WITHIN 360 NM NE...600 NM SE...540 NM SW AND 300
NM NW QUADRANTS WINDS 30 TO 45 KT. SEAS 3 TO 7 M.

...STORM WARNING...
.LOW 48N157W 1000 MB MOVING NE 25 KT. FROM 44N TO 48N BETWEEN
153W AND 160W WINDS 25 TO 35 KT. SEAS 3 TO 5 M. ELSEWHERE WITHIN
AN AREA BOUNDED BY
48N145W...44N145W...38N160W...50N160W...51N155W...50N150W...48N14
5W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW 52N147W 978 MB WITH SECONDARY CENTER
FORMED NEAR 55N141W 987 MB. FRONT WILL EXTEND FROM SECONDARY
CENTER TO 55N137W TO 53N134W TO 50N131W. FROM 47N TO 51N BETWEEN
143W AND 152W WINDS 40 TO 55 KT. SEAS 5 TO 9 M.  ALSO WITHIN 480
NM S AND 300 NM W SEMICIRCLES...AND WITHIN 180 NM NE AND E OF
FRONT...ALSO WITHIN 120 NM N OF A LINE FROM 53N148W TO 55N140W
WINDS 30 TO 45 KT. SEAS 3.5 TO 6.5 M. ELSEWHERE WITHIN 720 NM S
SEMICIRCLE...720 NM E...360 NM N AND 480 NM NW QUADRANTS OF MAIN
CENTER WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M IN MIXED SWELL.
.48 HOUR FORECAST LOW 50N128W 996 MB. WITHIN 180 NM SE AND 360
NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS 4 TO 7.5 M. ELSEWHERE
WITHIN AN AREA BOUNDED BY
55N140W...50N144W...40N133W...40N128W...46N124W...49N124W...55N14
0W WINDS 20 TO 30 KT. SEAS 3 TO 6 M.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 53N172W 995 MB MOVING E 15 KT.
WITHIN AN AREA BOUNDED BY
54N178W...50N176E...42N170W...42N164W...45N162W...49N163W...54N17
8W WINDS 25 TO 40 KT. SEAS 3 TO 6 M. ELSEWHERE WITHIN AN AREA
BOUNDED BY
51N160W...41N160W...39N170W...45N180W...50N174E...55N174E...57N18
0W...57N171W...51N160W  WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST LOW 52N163W 1010 MB. CONDITIONS DESCRIBED WITH
LOW 52N147W ABOVE.

...GALE WARNING...
.48 HOUR FORECAST LOW 49N160E 982 MB. FRONT WILL EXTEND FROM
CENTER TO 49N164E TO 46N166E TO 44N166E TO 39N160E. WITHIN 180
NM N AND 240 NM E OF FRONT...ALSO W OF FRONT TO 160E WINDS 30 TO
45 KT. SEAS 3 TO 6 M.

.SYNOPSIS AND FORECAST.

.LOW 61N147W 994 MB NEARLY STATIONARY. N OF A LINE FROM 56N156W
TO 51N140W TO 51N132W WINDS 20 TO 30 KT. SEAS 4 TO 7.5 M.
.24 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DIMINISHED.

.FROM 34N TO 42N BETWEEN 124W AND 129W WINDS 20 TO 30 KT. SEAS
TO 3 M.
.24 HOUR FORECAST FROM 36N TO 43N BETWEEN 124W AND 128W AREA OF
N TO NW WINDS TO 25 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF 63N BETWEEN
166W AND 168W.
.24 HOUR FORECAST DENSE FOG N OF 64N E OF 168W.
.48 HOUR FORECAST CONDITIONS IMPROVED.

.FORECASTER SHAW. 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 FRI OCT 17.
24 HOUR FORECAST VALID 1200 UTC SAT OCT 18.
48 HOUR FORECAST VALID 1200 UTC SUN OCT 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES...NEAR 13N99W 1009 MB. WITHIN 10N96W TO 12N96W TO
09N104W TO 08N109W TO 06N109W TO 07N101W TO 10N96W WINDS 20 TO 25
KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW PRES...PSBL TRPCL CYCLONE...NEAR 14N98W
1009 MB. WITHIN 13N96W TO 13N97W TO 12N98W TO 11N98W TO 10N97W
TO 11N95W TO 13N96W WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW PRES...PSBL TRPCL CYCLONE...NEAR 14.5N100W
1009 MB. WITHIN 12N97W TO 12N98W TO 12N99W TO 11N99W TO 10N97W
TO 11N96W TO 12N97W WINDS 20 TO 25 KT. SEAS TO 2.5 M.

.WITHIN 30N136W TO 30N140W TO 12N140W TO 13N125W TO 15N117W TO
30N136W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N SWELL.
.24 HOUR FORECAST WITHIN 30N128W TO 23N137W TO 30N140W TO
09N140W TO 09N134W TO 30N128W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN NW TO N SWELL.
.48 HOUR FORECAST WITHIN 30N121W TO 30N137W TO 27N135W TO
26N130W TO 27N127W TO 30N121W AND WITHIN 15N137W TO 14N140W TO
11N140W TO 11N138W TO 13N137W TO 15N137W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN NW TO N SWELL.

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

CONVECTION VALID AT 1500 UTC FRI OCT 17...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 07N78W TO 1009 MB LOW PRES NEAR 13N99W TO
1011 MB LOW PRES NEAR 07N137W TO 06N140W. SCATTERED MODERATE
N OF 06N AND E OF 102W...AND FROM 07N TO 13N BETWEEN 107W AND
120W.

$$
.FORECASTER ERA. NATIONAL HURRICANE CENTER.