225
FZPN01 KWBC 180424
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC SAT OCT 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC OCT 18.
24 HOUR FORECAST VALID 0000 UTC OCT 19.
48 HOUR FORECAST VALID 0000 UTC OCT 20.

.WARNINGS.

...HURRICANE FORCE WIND WARNING...
.COMPLEX LOW WITH MAIN CENTER 39N168E 997 MB MOVING NE 35 KT AND
WILL RAPIDLY INTENSIFY AFTER 12 HOURS. WITHIN 180 NM NW
SEMICIRCLE WINDS 40 TO 55 KT. SEAS 3.5 TO 6 M. ELSEWHERE FROM
35N TO 43N W OF 176E AND WITHIN 240 NM W OF A LINE FROM 38N166E
TO 31N162E WINDS 25 TO 40 KT. SEAS 2.5 TO 6 M...HIGHEST NEAR
35N160E.
.24 HOUR FORECAST LOW 47N174W 976 MB. WITHIN 180 NM S AND 90 NM
W QUADRANTS WINDS 55 TO 70 KT. SEAS 5.5 TO 10 M. ALSO FROM 43N
TO 47N BETWEEN 164W AND 176W AND WITHIN 180 NM NW AND N
SEMICIRCLES WINDS 40 TO 55 KT. SEAS 4 TO 7 M. ELSEWHERE WITHIN
240 NM N...420 NM E...480 NM S AND 360 NM W QUADRANTS WINDS 25
TO 40 KT. SEAS 3 TO 5 M. OTHERWISE WITHIN 540 NM S AND SE
SEMICIRCLES AND 300 NM N AND 600 NM W QUADRANTS...AND ALSO
WITHIN 240 NM SE OF A LINE FROM 41N176E TO 33N160E WINDS 20 TO
30 KT. SEAS TO 4 M.
.48 HOUR FORECAST LOW 53N154W 971 MB. FROM 46N TO 53N BETWEEN
150W AND 160W WINDS 45 TO 60 KT. SEAS 7 TO 12.5 M. ALSO FROM 44N
TO 56N BETWEEN 143W AND 163W WINDS 30 TO 45 KT. SEAS 4.5 TO 10
M...HIGHEST S AND SW OF LOW.

...STORM WARNING...
.LOW 51N153W 982 MB MOVING NE 25 KT THEN TURNING MORE SE AFTER
12 HOURS. FROM 46N TO 50N BETWEEN 150W AND 157W WINDS 40 TO 55
KT. SEAS 5 TO 7.5 M. ALSO FROM 43N TO 51N BETWEEN 149W AND
159W...AND WITHIN 180 NM NW AND N QUADRANTS WINDS 25 TO 40 KT.
SEAS 3 TO 6 M...HIGHEST S AND SW OF LOW. ELSEWHERE FROM 41N TO
54N BETWEEN 138W AND 159W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5
M...HIGHEST S AND SW OF LOW.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 52N137W 986 MB
AND A NEW SECOND CENTER NEAR 56N139W 986 MB. BETWEEN 60 NM AND
300 NM S AND 240 NM SW QUADRANTS OF MAIN LOW WINDS 35 TO 50 KT.
SEAS 5 TO 9 M. ALSO FROM 43N TO 52N BETWEEN 130W AND 147W AND
WITHIN 360 NM SW QUADRANT OF SECOND LOW WINDS 25 TO 40 KT. SEAS
3.5 TO 7.5 M...HIGHEST SW OF MAIN CENTER. ELSEWHERE FROM 41N TO
58N E OF 157W WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M IN MIXED SWELL.
.48 HOUR FORECAST LOW INLAND NEAR 51N123W 1008 MB. FROM 41N TO
54N E OF 138W WINDS TO 25 KT. SEAS 3 TO 6 M IN MIXED
SWELL...HIGHEST NEAR 48N127W.

...STORM WARNING...
.24 HOUR FORECAST LOW W OF AREA 48N156E 995 MB. FROM 42N TO 49N
BETWEEN 163E AND 160E AREA OF S TO SE WINDS 25 TO 40 KT. SEAS
2.5 TO 4 M.
.36 HOUR FORECAST LOW 50N161E 986 MB. WITHIN 420 NM S AND WITHIN
180 NM SW QUADRANTS WINDS 35 TO 50 KT. SEAS 4 TO 6.5 M.
.48 HOUR FORECAST LOW 51N169E 980 MB. FRONT WILL EXTEND FROM
52N169E TO 50N176E TO 43N174E. FROM 45N TO 50N W OF 174E WINDS
45 TO 55 KT. SEAS 5.5 TO 10 M. ELSEWHERE FROM 42N TO 51N W OF
178E...WITHIN 300 NM NW SEMICIRCLE AND WITHIN 180 NM NE AND E OF
FRONT WINDS 30 TO 45 KT. SEAS 3 TO 6.5 M.

...GALE WARNING...
.LOW 54N170W 1001 MB MOVING SE 20 KT. WITHIN 360 NM SW QUADRANT
AND WITHIN 360 NM SW AND S OF A LINE FROM LOW TO 51N159W WINDS
30 TO 45 KT. SEAS 4 TO 7 M. ELSEWHERE WITHIN 240 NM N SEMICIRCLE
AND 420 NM SW QUADRANT AND WITHIN 540 NM S OF THE SAME LINE
WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY COMPLEX LOW
52N137W ABOVE.

.SYNOPSIS AND FORECAST.

.LOW 60N147W 994 MB NEARLY STATIONARY. N OF A LINE FROM 60N152W
TO 47N128W WINDS LESS THAN 25 KT. SEAS 2.5 TO 6 M...HIGHEST NEAR
50N132W.
.24 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS AS DESCRIBED
WITH COMPLEX LOW 52N137W IN WARNINGS SECTION.

.FROM 33N TO 43N BETWEEN 124W AND 130W AREA OF N WINDS TO 25 KT.
SEAS TO 3 M.
.24 HOUR FORECAST WITHIN 420 NM E AND SE OF A LINE FROM 42N131W
TO 36N143W AREA OF N TO NE WINDS LESS THAN 25 KT. SEAS TO 4 M.
.48 HOUR FORECAST FROM 34N TO 41N BETWEEN 122W AND 132W AREA OF
N WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M...HIGHEST N.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 40N TO 49N
BETWEEN 143W AND 151W AND N OF 63N BETWEEN 166W AND 169W.
.24 HOUR FORECAST DENSE FOG FROM 48N TO 53N BETWEEN 168W AND
177E...AND FROM 45N TO 50N W OF 163E.
.48 HOUR FORECAST DENSE FOG FROM 51N TO 54N W OF 178E.

.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 0000 UTC SAT OCT 18.
24 HOUR FORECAST VALID 0000 UTC SUN OCT 19.
48 HOUR FORECAST VALID 0000 UTC MON OCT 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 21N134W TO 26N133W TO 30N140W TO 08N140W TO 08N132W TO
14N130W TO 21N134W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N
SWELL.
.24 HOUR FORECAST WITHIN 30N124W TO 30N140W TO 12N140W TO
21N134W TO 30N124W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW
SWELL.
.48 HOUR FORECAST WITHIN 30N117W TO 30N136W TO 28N136W TO
27N128W TO 24N124W TO 25N119W TO 30N117W WINDS 20 KT OR LESS.
SEAS TO 2.5 M IN NW SWELL. ELSEWHERE WITHIN 13N135W TO 15N137W TO
16N140W TO 10N140W TO 10N137W TO 11N135W TO 13N135W WINDS 20 KT
OR LESS. SEAS TO 2.5 M IN NW TO N SWELL.

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

CONVECTION VALID AT 0300 UTC SAT OCT 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 07N78W TO 1007 MB LOW PRES NEAR 13N97W TO
1007
MB LOW PRES NEAR 10N117W AND BEYOND 08N140W. SCATTERED MODERATE
FROM
07N TO 16N BETWEEN 87W AND 105W.

$$
.FORECASTER DELGADO. NATIONAL HURRICANE CENTER.