564
FZPN01 KWBC 010420
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC MON DEC 01 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC DEC 01.
24 HOUR FORECAST VALID 0000 UTC DEC 02.
48 HOUR FORECAST VALID 0000 UTC DEC 03.

.WARNINGS.

...HURRICANE FORCE WIND WARNING...
.LOW 32N172W 992 MB MOVING NE 45 KT. WITHIN 120 NM S SEMICIRCLE
WINDS 35 TO 50 KT. SEAS 4 TO 6 M. ELSEWHERE CONDITIONS DESCRIBED
WITH COMPLEX LOW 48N177W BELOW.
.18 HOUR FORECAST LOW 42N161W 970 MB.WITHIN 120 NM S SEMICIRCLE
WINDS 50 TO 65 KT. SEAS 5 TO 7.5 M.
.24 HOUR FORECAST LOW 48N160W 970 MB. WITHIN 300 NM E AND 180 NM
S SEMICIRCLES WINDS 45 TO 60 KT. SEAS 4.5 TO 7 M. ALSO WITHIN 420
NM NE...600 NM SE...260 NM SW...AND 300 NM NW QUADRANTS WINDS 30
TO 45 KT. SEAS 4 TO 6.5 M. ELSEWHERE S OF 55N BETWEEN 145W AND
165W WINDS 20 TO 30 KT. SEAS 3 TO 4.5 M.
.48 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY COMPLEX LOW
53N170W BELOW.

...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 44N172W 982 MB MOVING NE 20 KT THEN
TURNING NW AFTER 12 HOURS. FROM 32N TO 45N W OF 160W WINDS 25 TO
40 KT. SEAS 3.5 TO 6 M...HIGHEST NEAR 42N159W AND 36N170E.
ELSEWHERE...EXCEPT WHERE DESCRIBED WITH HURRICANE FORCE WIND
WARNING ABOVE...S OF 45N W OF 144W WINDS TO 25 KT. SEAS 3 TO 5 M
IN MIXED SWELL.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 50N169W 973 MB
AND SECOND CENTER 45N173W 980 MB. WITHIN 540 NM SW QUADRANT OF
FIRST CENTER...AND BETWEEN 300 NM AND 660 NM NW QUADRANT OF
SECOND CENTER WINDS 35 TO 45 KT. SEAS 4 TO 7.5 M...HIGHEST NEAR
55N178W. ALSO N OF 30N BETWEEN 165W AND 170E WINDS 25 TO 35 KT.
SEAS 3 TO 5.5 M. ELSEWHERE N OF 30N BETWEEN 170E AND 164E WINDS
TO 25 KT. SEAS 3 TO 4.5 M IN N SWELL.
.30 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER NEAR 51N171W 968
MB. BETWEEN 180 NM AND 540 NM N AND NW QUADRANTS WINDS 35 TO 50
KT. SEAS 6 TO 8.6 M.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 53N170W 968 MB.
WITHIN 540 NM NW SEMICIRCLE AND BETWEEN 300 NM AND 780 NM SW
QUADRANT WINDS 40 TO 55 KT. SEAS 6 TO 9.5 M...HIGHEST CONDITIONS
NW OF MEAN CENTER. ALSO WITHIN THE BERING SEA BETWEEN 157W AND
172E...WITHIN 540 NM SE SEMICIRCLE...AND S OF 52N BETWEEN 170W
AND 172E WINDS 25 TO 40 KT. SEAS 3 TO 7 M. ELSEWHERE WITHIN 900
NM SE SEMICIRCLE AND S OF 40N BETWEEN 160W AND 167E WINDS TO 25
KT. SEAS 2.5 TO 5.5 M...HIGHEST ALONG 180W.

...GALE WARNING...
.LOW 59N149W 990 MB MOVING NE 10 KT. N AND E OF A FRONT FROM LOW
CENTER TO 59N146W TO 58N140W TO 51N132W WINDS 30 TO 45 KT. SEAS 4
TO 6 M. ELSEWHERE N OF 50N BETWEEN 130W AND 152W WINDS 20 TO 30
KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST LOW DISSIPATED INLAND AND ASSOCIATED CONDITIONS
DIMINISHED.

...GALE WARNING...
.COMPLEX LOW WITH FIRST CENTER 48N177W 982 MB MOVING SE 10 KT AND
SECOND CENTER 53N166W 981 MB MOVING NW 15 KT THEN DISSIPATING.
WITHIN 540 NM NW QUADRANT OF FIRST CENTER...WITHIN 600 NM SE AND
420 NM S QUADRANTS OF SECOND CENTER...AND WITHIN 420 NM NW OF A
LINE FROM 50N180W TO 60N165W WINDS 30 TO 45 KT. SEAS 4 TO 6.5
M...HIGHEST NW OF FIRST CENTER. ELSEWHERE N OF 44N W OF
150W...EXCEPT N OF 53N BETWEEN 150W AND 165W...WINDS 20 TO 30 KT.
SEAS 3 TO 6 M IN MIXED SWELL.
.24 HOUR FORECAST LOW AND CONDITIONS DESCRIBED WITH LOW 50N169W
ABOVE.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY N OF 61N W OF ALASKA. ELSEWHERE
LIGHT TO MODERATE FREEZING SPRAY N OF A LINE FROM 56N176E TO
60N167W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 61N W OF
ALASKA. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 58N W OF
165W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 60N W OF
ALASKA. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 59N W OF
ALASKA.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST N OF 42N W OF 163E AREA OF S TO SE WINDS 20 TO
30 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST N OF 30N W OF 168E WINDS 20 TO 30 KT. SEAS 2.5
TO 4 M IN MIXED SWELL.

.48 HOUR FORECAST FROM 35N TO 46N BETWEEN 124W AND 129W AREA OF N
WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 120 NM EITHER
SIDE OF A LINE FROM 56N150W TO 58N143W TO 53N137W TO 46N139W TO
38N148W...AND WITHIN 480 NM NW OF A LINE FROM 44N180W TO 53N173W
TO 59N163W.
.24 HOUR FORECAST DENSE FOG FROM 47N TO 61N BETWEEN 161W AND
175E...AND FROM 36N TO 48N BETWEEN 143W AND 153W.
.48 HOUR FORECAST DENSE FOG FROM 39N TO 62N BETWEEN 165W AND
180W...AND WITHIN 240 NM EITHER SIDE OF A LINE FROM 56N140W TO
40N150W.

.FORECASTER ANDERSON. 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 0000 UTC MON DEC 1.
24 HOUR FORECAST VALID 0000 UTC TUE DEC  2.
48 HOUR FORECAST VALID 0000 UTC WED DEC  3.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 23N106W TO 24N107W TO 23N108W TO 22N108W TO 22N107W TO
22N106W TO 23N106W NW TO N WINDS 20 TO 25 KT. SEAS LESS THAN 2.5
M.
.06 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.WITHIN 16N94W TO 16N95W TO 15N95W TO 15N94W TO
16N94W...INCLUDING
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN
2.5 M.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.03 HOUR FORECAST WITHIN 30N139W TO 30N140W TO 27N140W TO
28N139W TO 30N139W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN W
TO NW SWELL.
.24 HOUR FORECAST WITHIN 26N132W TO 30N130W TO 30N140W TO
15N140W TO 16N138W TO 26N132W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN W TO NW SWELL.
.48 HOUR FORECAST WITHIN 30N124W TO 30N140W TO 09N140W TO
10N133W TO 19N125W TO 30N124W 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 0350 UTC MON DEC 1...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 09N85W TO 07N90W TO 05N96W. THE
ITCZ STRETCHES FROM 05N96W TO 07N106W TO 10N112W THEN RESUMES
FROM 09N130W AND BEYOND 07N140W. NUMEROUS MODERATE TO ISOLATED
STRONG FROM 15N TO 20N BETWEEN 108W AND 117W. SCATTERED MODERATE
ELSEWHERE FROM 05N TO 09N E OF 95W.

.FORECASTER RAMOS. NATIONAL HURRICANE CENTER.

$$