FZPN01 KWBC 152228
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC MON DEC 15 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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).

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 DEC 15. 
24 HOUR FORECAST VALID 1800 UTC DEC 16.
48 HOUR FORECAST VALID 1800 UTC DEC 17.

.WARNINGS.

...STORM WARNING... 
.COMPLEX LOW WITH FIRST CENTER 57N140W 969 MB NEARLY STATIONARY
AND SECOND CENTER 51N145W 982 MB MOVING NE 20 KT. WITHIN 90 NM N
AND W SEMICIRCLE OF THE FIRST CENTER AND WITHIN 180 NM S QUADRANT
OF THE SECOND CENTER...AND FROM 50N TO 55N BETWEEN 160W AND 167W
WINDS 35 TO 50 KT. SEAS 4.5 TO 8.5 M...HIGHEST N QUADRANT OF
FIRST CENTER. ELSEWHERE N OF 44N BETWEEN 130W AND 154W AND N OF
48N BETWEEN 154W AND 172W WINDS 25 TO 35 KT. SEAS 3 TO 6 M.
.24 HOUR FORECAST COMBINED LOW 58N139W 984 MB. WITHIN 90 NM OF
CENTER WINDS 25 TO 40 KT. SEAS 3 TO 6 M.
.48 HOUR FORECAST COMBINED LOW 58N143W 988 MB. ASSOCIATED
CONDITIONS DIMINISHED.

...STORM WARNING... 
.COMPLEX LOW WITH MAIN CENTER 31N170W 1000 MB MOVING E 15 KT. S
OF 38N BETWEEN 162W AND 176W WINDS 25 TO 40 KT. SEAS 3.5 TO 7 M.
.24 HOUR FORECAST LOW 31N164W 999 MB. WITHIN 180 NM NW OF A LINE
FROM 30N170W TO 32N168W TO 34N160W WINDS 35 TO 45 KT. SEAS 4.5 TO
8.5 M. ELSEWHERE FROM 30N TO 39N BETWEEN 155W AND 176W WINDS 25
TO 35 KT. SEAS 3 TO 6 M.
.30 HOUR FORECAST LOW 33N163W 998 MB. WITHIN 240 NM NE QUADRANT
WINDS 35 TO 50 KT. SEAS 4 TO 8 M.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 35N159W 999 MB. S
OF 44N BETWEEN 138W AND 171W WINDS 25 TO 40 KT. SEAS 4 TO 8 M.

...STORM WARNING... 
.COMPLEX LOW WITH MAIN CENTER W OF AREA 48N152E 985 MB MOVING NE
25 KT. WITHIN 120 NM E OF A LINE FROM 44N160E TO 40N162W WINDS 45
TO 55 KT. SEAS 4.5 TO 8.5 M. ELSEWHERE W OF A LINE FROM 51N163E
TO 44N168E TO 32N164E TO 30N160E WINDS 35 TO 45 KT. SEAS 4 TO 7.5
M. ELSEWHERE W OF A LINE FROM 53N166E TO 47N173E TO 30N166E WINDS
25 TO 40 KT. SEAS TO 4 M.
.24 HOUR FORECAST COMPLEX LOW WITH NEW MAIN LOW 44N170E 1010 MB.
FRONT TO EXTEND FROM 52N166E TO 46N170E TO LOW CENTER TO 35N169E
TO 30N169E. WITHIN 300 NM E FRONT N OF 40N WINDS 25 TO 35 KT.
SEAS 3 TO 6 M. ELSEWHERE W OF 175E WINDS 20 TO 30 KT. SEAS 2.5 TO
5 M.
.48 HOUR FORECAST LOW WELL NW OF AREA. N OF 46N W OF 180W WINDS
20 TO 30 KT. SEAS 2.5 TO 4.5 M.

...STORM WARNING...
.24 HOUR FORECAST FROM 55N TO 58N BETWEEN 160W AND 164W WINDS 35
TO 45 KT. SEAS 3 TO 5.5 M. ELSEWHERE N OF A LINE FROM 47N171W TO
44N167W TO 53N152W WINDS 25 TO 35 KT. SEAS 3 TO 5 M.
.30 HOUR FORECAST NEW LOW 56N151W 991 MB. WITHIN 360 NM W
QUADRANT WINDS 35 TO 50 KT. SEAS 3 TO 6 M.
.48 HOUR FORECAST LOW 53N143W 989 MB. WITHIN 360 NM S AND 660 NM
W QUADRANTS WINDS 35 TO 50 KT. SEAS 4 TO 8 M. ELSEWHERE WITHIN
540 NM S AND 780 NM W QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO 6
M.

...GALE WARNING... 
. FRONT EXTENDS FROM 50N127W TO 45N128W TO 42N130W. WITHIN 240 NM
E AND SE OF THE FRONT WINDS 25 TO 40 KT. SEAS 3 TO 6 M.
.24 HOUR FORECAST ASSOCIATED CONDITIONS DIMINISHED.

...GALE WARNING...
.LOW 46N156W 977 MB MOVING NE 30 KT. WITHIN 600 NM SE AND 720 NM
W QUADRANT WINDS 25 TO 40 KT. SEAS 3.5 TO 6.5 M.
.24 HOUR FORECAST LOW 50N136W 992 MB. WITHIN 660 NM S AND 600 W
QUADRANTS WINDS 25 TO 40 KT. SEAS 3 TO 5.5 M.
.48 HOUR FORECAST LOW 55N134W 990 MB. FROM 44N TO 54N E OF 137W
WINDS 25 TO 35 KT. SEAS 3 TO 6 M.

...GALE WARNING...
.06 HOUR FORECAST NEW LOW 63N167W 1006 MB. WITHIN 480 NM SW
QUADRANT WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED BY FIRST
STORM WARNING ABOVE.

...HEAVY FREEZING SPRAY WARNING... 
.LIGHT TO MODERATE FREEZING SPRAY N OF A LINE FROM 57N155W TO
55N157W TO 62N175W AND WITHIN 60 NM S OF THE ALASKA COAST BETWEEN
138W AND 148W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 58N E OF
170W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF A LINE FROM
57N154W TO 56N156W TO 61N176W AND WITHIN 60 NM S OF THE ALASKA
COAST BETWEEN 142W AND 148W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE
FROM 57N155W TO 58N166W. ELSEWHERE LIGHT TO MODERATE FREEZING
SPRAY N OF A LINE FROM 59N142W TO 60N148W TO 55N154W TO 55N169W
TO 63N173W.

.SYNOPSIS AND FORECAST.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 49N TO 58N
BETWEEN 136W AND 147W.
.24 HOUR FORECAST DENSE FOG FROM 38N TO 43N BETWEEN 124W AND
131W.
.48 HOUR FORECAST CONDITIONS IMPROVED.

.FORECASTER HYDE. 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 MON DEC 15.
24 HOUR FORECAST VALID 1800 UTC TUE DEC 16.
48 HOUR FORECAST VALID 1800 UTC WED DEC 17.

.WARNINGS.

...GALE WARNING...
.WITHIN 15N94W TO 16N94W TO 16N96W TO 14N96W TO 14N95W TO 15N94W
...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO 40 
KT. SEAS 2.5 TO 4.5 M. ELSEWHERE WITHIN 16N94W TO 16N96W TO 
11N101W TO 10N98W TO 11N95W TO 13N94W TO 16N94W N TO NE WINDS 20
TO 30 KT. SEAS 2.5 TO 3.5 M.
.06 HOUR FORECAST LITTLE CHANGE...EXCEPT WINDS TO 45 KT AND SEAS
TO 5.0 M.
.18 HOUR FORECAST WITHIN 15N94W TO 16N94W TO 16N96W TO 13N97W TO
13N96W TO 14N95W TO 15N94W...INCLUDING THE GULF OF TEHUANTEPEC 
...N TO NE WINDS 30 TO 35 KT. SEAS 2.5 TO 4.5 M. ELSEWHERE WITHIN
12N94W TO 15N94W TO 13N100W TO 11N101W TO 10N99W TO 11N95W TO 
12N94W N TO NE WINDS 20 TO 30 KT. SEAS 2.5 TO 4.0 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 2.5 M IN N TO NE SWELL.

.SYNOPSIS AND FORECAST.

.WITHIN 17N127W TO 20N132W TO 19N140W TO 08N140W TO 13N131W TO
13N125W TO 17N127W NE TO E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 20N135W TO 20N140W TO 10N140W TO 
12N137W TO 11N131W TO 15N128W TO 20N135W WINDS 20 KT OR LESS. 
SEAS 2.5 TO 3.0 M IN E SWELL.
.48 HOUR FORECAST WITHIN 16N133W TO 19N135W TO 22N140W TO 
11N140W TO 12N134W TO 16N133W WINDS 20 KT OR LESS. SEAS 2.5 TO 
3.0 M IN E SWELL.

.WITHIN 11N86W TO 10N87W TO 10N88W TO 10N87W TO 10N86W TO 11N86W
...INCLUDING THE GULF OF PAPAGAYO...NE 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.

.06 HOUR FORECAST WITHIN 30N139W TO 30N140W TO 29N140W TO
30N139W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN W TO NW SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.42 HOUR FORECAST WITHIN 30N121W TO 30N124W TO 29N125W TO
28N124W TO 28N122W TO 30N121W WINDS 20 KT OR LESS. SEAS 2.5 M IN
W TO NW SWELL.
.48 HOUR FORECAST WITHIN 30N119W TO 30N125W TO 28N126W TO 
27N125W TO 27N122W TO 28N120W TO 30N119W WINDS 20 KT OR LESS. 
SEAS 2.5 TO 3.0 M IN W TO NW SWELL.

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

CONVECTION VALID AT 1900 UTC MON DEC 15...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 08.5N78W TO 07N95W. ITCZ FROM 07N95W TO 
08N111W TO 07.5N125W. SURFACE TROUGH FROM 15N128W TO 06N126W. 
ITCZ FROM 07N127.5W TO BEYOND 06N140W. SCATTERED MODERATE 
FROM 05N TO 10.5N BETWEEN 77W AND 86W...FROM 10N TO 12N BETWEEN 
109W AND 112W...FROM 07.5N TO 10N BETWEEN 116W AND 120W...AND 
FROM 09N TO 12N BETWEEN 124W AND 127W.


.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.

$$