573
FZPN01 KWBC 161040 CCA
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC THU OCT 16 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC OCT 16.
24 HOUR FORECAST VALID 0600 UTC OCT 17.
48 HOUR FORECAST VALID 0600 UTC OCT 18.

.WARNINGS.

...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 57N160W 973 MB MOVING NE 20 KT AND
A NEW SECOND CENTER 59N152W 971 MB MOVING N 15 KT. FRONT EXTENDS
LFROM SECOND LOW TO 60N146W TO 58N139W TO 54N135W TO 43N147W.
FROM 50N TO 55N BETWEEN 147W AND 167W AND N AND NE OF FRONT N OF
55N AND E OF 146W WINDS 35 TO 50 KT. SEAS 5.5 TO 10 M...EXCEPT N
AND NE OF FRONT SEAS 4 TO 6 M. ALSO WITHIN 660 NM S AND SE
SEMICIRCLES AND BETWEEN 240 NM AND 540 NM W QUADRANT OF MAIN LOW
AND WITHIN 120 NM N AND E OF FRONT WINDS 25 TO 35 KT. SEAS3 TO 8
M...EXCEPT N AND E OF FRONT SEAS TO 4 M. ELSEWHERE N OF 41N
BETWEEN 140W AND 179W AND WITHIN 1080 NM E QUADRANT OF MAIN LOW
WINDS TO 25 KT. SEAS 2.5 TO 5.5 M.
.24 HOUR FORECAST MAIN LOW 59N146W 990 MB AND SECOND LOW
DISSIPATED INLAND. FROM 51N TO 59N BETWEEN 137W AND 150W AND
WITHIN 540 NM SW QUADRANT WINDS 25 TO 40 KT. SEAS 3 TO 8
M...EXCEPT SEAS TO 4 M IN BERING SEA. ELSEWHERE N OF 48N E OF
146W AND WITHIN 820 NM W AND 660 NM SW QUADRANTS WINDS 20 TO 30
KT. SEAS 2.5 TO 6.5 M...HIGHEST S AND SE OF LOW. ALSO S OF 48N
BETWEEN 132W AND 149W WINDS LESS THAN 25 KT. SEAS TO 5 M.
.48 HOUR FORECAST LOW 59N144W 1000 MB. CONDITIONS DIMINISHED.

...STORM WARNING...
.LOW 37N177W 1008 MB MOVING NE 40 KT. WITHIN 420 NM SE AND 300
NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW 47N160W 1006 MB. WITHIN 360 NM S AND SE
QUADRANTS WINDS 25 TO 35 KT. SEAS 3 TO 4.5 M.
.48 HOUR FORECAST LOW 52N149W 979 MB. FROM 46N TO 52N BETWEEN
145W AND 153W WINDS 40 TO 55 KT. SEAS 4 TO 8 M. ALSO FROM 44N TO
52N BETWEEN 153W AND 167W...AND WITHIN 600 NM E QUADRANT WINDS
25 TO 40 KT. SEAS 2.5 TO 6.5 M. ELSEWHERE FROM 41N TO 56N
BETWEEN 131W AND 167W WINDS 20 TO 30 KT. SEAS TO 4.5 MIGHEST S .

...STORM WARNING...
.24 HOUR FORECAST LOW W OF AREA 38N155E 996 MB. FROM 36N TO 39N
BETWEEN 162E AND 160E WINDS 25 TO 35 KT. SEAS TO 3 M.
.36 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 38N163E 996 MB.
WITHIN 150 NM NW SEMICIRCLE WINDS 45 TO 60 KT. SEAS 4.5 TO 7 M.
ELSEWHERE WITHIN 480 NM SE AND S SEMICIRCLES AND 240 NM N AND
300 NM NW QUADRANTS WINDS 30 TO 45 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR COMPLEX LOW WITH MEAN CENTER NEAR 40172E 994 MB. WITHIN
180 NM NW SEMICIRCLE WINDS 45 TO 60 KT. SEAS 4 TO 7 M. ELSEWHERE
WITHIN 240 NM W OF A LINE FROM 43N170E WINDS 30 TO 45 KT. SEAS
T3.5 TO 6 M. ALSO WITHIN 300 NM E OF THE SAME LINE N OF 35N
WINDS 25 TO 35 KT. SEAS TO 4 M.

...GALE WARNING...
.LOW 49N172E 996 MB MOVING E 20 KT. FROM 44N TO 49N BETWEEN 174E
AND 167E AND WITHIN 180 NM W QUADRANT WINDS 30 TO 45 KT. SEAS
2.5 TO 5.5 M...HIGHEST NEAR 47N170E.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 49N175W 996 MB
AND A NEW CENTER 53N177W 994 MB. WITHIN 300 NM S AND SW
QUADRANTS OF MAIN LOW WINDS 30 TO 45 KT. SEAS 4 TO 6.5 M.
ELSEWHERE WITHIN 300 NM SE...480 NM S AND 360 NM W QUADRANTS OF
MAIN LOW AND WITHIN 420 NM W QUADRANT OF NEW CENTER WINDS 25 TO
35 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 53N163W 999 MB.
WITHIN 480 NM S AND 360 NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS
3.5 TO 7.5 M. ELSEWHERE FROM 41N TO 53N BETWEEN 158W AND 165W
AND WITHIN 540 NM W AND SW QUADRANTS WINDS 20 TO 30 KT. SEAS 2.5
TO 4 M.

.SYNOPSIS AND FORECAST...CORRECTED.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF 61N BETWEEN
170W AND 175W.
.24 HOUR FORECAST DENSE FOG N OF 59N BETWEEN 165W AND 169W.
.48 HOUR FORECAST DENSE FOG FROM 54N TO 60N BETWEEN 180W AND
173E.

.FORECASTER BANCROFT. 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 0600 UTC THU OCT 16.
24 HOUR FORECAST VALID 0600 UTC FRI OCT 17.
48 HOUR FORECAST VALID 0600 UTC SAT OCT 18.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.BROAD LOW PRES...INVEST EP91...NEAR 12N97W 1007 MB. WITHIN
14N96W TO 14N98W TO 11N99W TO 11N97W TO 11N96W TO 14N96W WINDS 20
KT OR LESS. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LOW PRES...INVEST EP91...POSSIBLE TROPICAL
CYCLONE...NEAR 12N98W 1006 MB. WITHIN 10N95W TO 11N95W TO 12N97W
TO 10N99W TO 08N99W TO 07N97W TO 10N95W SW WINDS 20 TO 25 KT.
SEAS TO 2.5 M.
.48 HOUR FORECAST LOW PRES...INVEST EP91...POSSIBLE TROPICAL
CYCLONE...NEAR 13N98W 1005 MB. WITHIN 13N97W TO 11N99W TO 10N98W
TO
10N96W TO 11N96.5W TO 13N97W S TO SW WINDS 20 TO 25 KT. SEAS 2.5
TO
3 M. WITHIN 16N98W TO 15N99W TO 13N97W TO 15N97W TO 16N98W E TO
SE
WINDS 20 TO 25 KT. SEAS TO 2.5 M.

.WITHIN 29N118W TO 30N140W TO 24N140W TO 22N133W TO 23N124W TO
29N118W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN N SWELL.
.24 HOUR FORECAST WITHIN 22N136W TO 28N140W TO 14N140W TO
15N131W TO
8N128W TO 21N132W WINDS 20 KT OR LESS. SEAS 2.5 M IN N TO NE
SWELL.
.48 HOUR FORECAST CONDITIONS TO SHIFT W OF AREA.

.WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO 15N95W TO 15N94W
TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20
TO 25 KT. SEAS LESS THAN 2.5 M.
.12 HOUR FORECAST 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 0945 UTC THU OCT 16...

.LOW PRES NEAR 12N97W 1007 MB...NUMEROUS MODERATE TO STRONG FROM
12N
TO 14N BETWEEN 95.5W AND 98W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH AXIS EXTENDS FROM 11N86W TO LOW PRES NEAR
12N96W 1007 MB TO 09N105W TO 11N114W TO 09N120W TO 09N132W. ITCZ
EXTENDS FROM 09N132W TO 10N140W. SCATTERED MODERATE ISOLATED
STRONG FROM 06N TO 10N BETWEEN 86W AND 92W AND WITHIN 180 NM S OF
THE TROUGH BETWEEN 93W AND 95W. SCATTERED MODERATE FROM 05N TO
10N BETWEEN 81W AND 86W.

$$
.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.