514
FZPN01 KWBC 171036 CCA
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC OCT 17.
24 HOUR FORECAST VALID 0600 UTC OCT 18.
48 HOUR FORECAST VALID 0600 UTC OCT 19.

.WARNINGS.

...HURRICANE FORCE WIND WARNING...
.06 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 38N159E 997 MB.
FROM 37N TO 40N BETWEEN 163E AND 160E WINDS 40 TO 55 KT. SEAS 3
TO 5.5 M. ELSEWHERE FROM 34N TO 42N BETWEEN 167E AND 160E WINDS
25 TO 40 KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 40N173E 1001 MB.
WITHIN 240 NM NW SEMICIRCLE WINDS 35 TO 50 KT. SEAS 3 TO 6 M.
ELSEWHERE FROM 37N TO 44N BETWEEN 180W AND 166E AND WITHIN 300
NM W OF A LINE FROM LOW TO 30N163E WINDS 25 TO 40 KT. SEAS 2.5
TO 5.5 M...HIGHEST NEAR 34N160E.
.48 HOUR FORECAST COMBINED LOW 49N167W 972 MB. FROM 45N TO 49N
BETWEEN 165W AND 169W AND WITHIN 90 NM W QUADRANT WINDS 50 TO 65
KT. SEAS 4.5 TO 9 M. ALSO FROM 43N TO 49N BETWEEN 162W AND 170W
AND WITHIN 120 NM W AND NW QUADRANTS WINDS 40 TO 55 KT. SEAS 120
NM OF LOW EXCEPT 180 NM S QUADRANT AND WITHIN 180 NM E OF A
FRONT FROM 47N170W TO 45N170W TO 41N173W WINDS 40 TO 55 KT. SEAS
3 TO 7 M...HIGHEST S AND SW OF LOW. ELSEWHERE FROM 40N TO 51N
BETWEEN 155W AND 173W WINDS 25 TO 40 KT. SEAS 2.5 TO 5.5 M.

...STORM WARNING...
.LOW 46N160W 1004 MB MOVING NE 25 KT AND RAPIDLY INTENSIFYING.
WITHIN 360 NM S AND SE QUADRANTS WINDS 25 TO 35 KT. SEAS 3 TO
4.5 M. ELSEWHERE WITHIN 540 NM E AND SE AND 360 NM SW QUADRANTS
WINDS TO 25 KT. SEAS 2.5 TO 4 M.
.12 HOUR FORECAST LOW 50N154W 992 MB. FROM 46N TO 49N BETWEEN
151W AND 158W WINDS 35 TO 50 KT. SEAS 4 TO 5.5 M.
.24 HOUR FORECAST LOW 52N149W 979 MB. WITHIN 240 NM S...180 NM
SE AND 120 NM W QUADRANTS WINDS 40 TO 55 KT. SEAS 4.5 TO 8.5
M...HIGHEST S OF LOW. ALSO WITHIN 180 NM NW SEMICIRCLE...300 NM
E QUADRANT...FROM 44N TO 51N BETWEEN 144W AND 162W AND WITHIN
180 NM NE AND E OF A FRONT FROM 54N145W TO 52N138W TO 44N142W
WINDS 25 TO 40 KT. SEAS 3.5 TO 6.5 M. ELSEWHERE WITHIN 960 NM E
AND 840 NM S QUADRANTS AND FROM 40N TO 57N BETWEEN 150W AND 162W
WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M IN MIXED SWELL.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 51N132W 991 MB.
WITHIN 240 NM SW QUADRANT WINDS 35 TO 50 KT. SEAS 5.5 TO 8 M.
ALSO WITHIN 480 NM SW SEMICIRCLE AND 240 NM E QUADRANT WINDS 25
TO 40 KT. SEAS 3 TO 7 M...HIGHEST SW OF LOW. ELSEWHERE FROM 41N
TO 57N BETWEEN 127W AND 149W WINDS 20 TO 30 KT. SEAS 2.5 TO 5.5
M...HIGHEST SW OF LOW. OTHERWISE S OF 41N BETWEEN 129W AND 155W
WINDS LESS THAN 25 KT. SEAS TO 4 M.

...GALE WARNING...
.LOW 60N147W 991 MB NEARLY STATIONARY. FROM 51N TO 57N BETWEEN
135W AND 155W WINDS 25 TO 35 KT. SEAS 4 TO 7.5 M. ELSEWHERE
WITHIN 720 NM W AND SW QUADRANTS AND N OF 48N BETWEEN 130W AND
149W WINDS TO 25 KT. SEAS 2.5 TO 6 M...HIGHEST S OF LOW. ALSO
EXCEPT WHERE OTHERWISE NOTED S OF 48N BETWEEN 130W AND 155W
WINDS LESS THAN 25 KT. SEAS TO 5 M.
.24 HOUR FORECAST LOW 59N147W 999 MB. N OF 56 E OF 158W WINDS TO
25 KT. SEAS TO 4 M... HIGHEST NEAR 56N138W.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 50N174W 996 MB MOVING NE 25 KT AND
A SECOND CENTER 53N177W 995 MB MOVING E 15 KT. WITHIN 420 NM S
AND SW QUADRANTS OF MAIN CENTER AND WITHIN 360 NM SW QUADRANT OF
SECOND LOW WINDS 25 TO 40 KT. SEAS 3.5 TO 7 M...HIGHEST NEAR
46N177W. ELSEWHERE FROM 39N TO 56N BETWEEN 166W AND 180W AND
WITHIN 420 NM W AND SW QUADRANTS OF SECOND LOW WINDS 20 TO 30
KT. SEAS 2.5 TO 5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 52N165W 1004 MB.
FROM 44N TO 51N BETWEEN 158W AND 175W WINDS 25 TO 40 KT. SEAS
3.5 TO 7 M. ELSEWHERE FROM 41N TO 55N BETWEEN 158W AND 177W
WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M...HIGHEST SW OF LOW.
.48 HOUR FORECAST COMPLEX LOW AND ASSOCIATED CONDITIONS ABSORBED
BY COMPLEX LOW IN STORM WARNING ABOVE.

...GALE WARNING...
.48 HOUR FORECAST LOW JUST W OF AREA 49N158E 991 MB. W OF A LINE
FROM 51N163E TO 47N167E TO 40N163E WINDS 25 TO 40 KT. SEAS 3 TO
5 M.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST FROM 34N TO 45N BETWEEN 124W AND 129W AREA OF
N TO NW WINDS TO 25 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST WITHIN 360 NM E AND SE OF A LINE FROM 41N127W
TO 34N139W AREA OF N TO NE WINDS LESS THAN 25 KT. SEAS TO 3 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 40N TO 45N
BETWEEN 145W AND 155W...AND N OF 59N BETWEEN 167W AND 171W.
.24 HOUR FORECAST CONDITIONS IMPROVED.
.48 HOUR FORECAST DENSE FOG FROM 49N TO 52N BETWEEN 168W AND
170W...FROM 58N TO 62N BETWEEN 169W AND 172W...FROM 54N TO 56N
BETWEEN 179W AND 178E...AND FROM 48N TO 51N W OF 168E.

.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 FRI OCT 17.
24 HOUR FORECAST VALID 0600 UTC SAT OCT 18.
48 HOUR FORECAST VALID 0600 UTC SUN OCT 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES...NEAR 13N99W 1008 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 14N100W
1006 MB. WITHIN 11N95W TO 14N97W TO 11N101W TO 11N107W TO
08N110W TO 07N102W TO 11N95W WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0
M.
.48 HOUR FORECAST LOW PRES...PSBL TRPCL CYCLONE...NEAR 15N101W
1006 MB. WITHIN 13N96W TO 14N107W TO 08N108W TO 08N100W TO 09N97W
TO 13N96W WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.

.WITHIN 20N127W TO 30N133W TO 30N140W TO 11N140W TO 13N122W TO
16N115W TO 20N127W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N
SWELL.
.24 HOUR FORECAST WITHIN 30N126W TO 20N136W TO 30N140W TO
07N140W TO 08N132W TO 30N126W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN NW AND N SWELL.
.48 HOUR FORECAST WITHIN 30N122W TO 30N140W TO 14N140W TO
30N122W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW SWELL.

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

CONVECTION VALID AT 0830 UTC FRI OCT 17...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N86W TO 1008 MB LOW PRES (EP91) NEAR
13N99W TO 1010 MB LOW PRES NEAR 10N118W AND TO 07N124W. ITCZ
FROM 07N124W TO BEYOND 06N140W. SCATTERED MODERATE FROM 06N TO
17N AND E OF 107W...FROM 07N TO 11N BETWEEN 108W AND 120W.

$$
.FORECASTER DELGADO. NATIONAL HURRICANE CENTER.