North Pacific High Seas Forecast

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FZPN01 KWBC 100420
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
0430 UTC SUN DEC 10 2023 

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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). 

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 10. 
24 HOUR FORECAST VALID 0000 UTC DEC 11. 
48 HOUR FORECAST VALID 0000 UTC DEC 12. 

.WARNINGS. 

...STORM WARNING... 
.LOW 40N174E 989 MB MOVING E 25 KT THEN TURNING MORE NE AFTER 12 
HOURS. WITHIN 300 NM SW QUADRANT WINDS 35 TO 50 KT. SEAS 18 TO 
28 FT. ELSEWHERE S OF 47N BETWEEN 179E AND 164E WINDS 25 TO 40 
KT. SEAS 11 TO 24 FT. 
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 42N168W 990 MB. 
WITHIN 540 NM SW AND 300 NM NW QUADRANTS WINDS 30 TO 45 KT. SEAS 
14 TO 25 FT. ELSEWHERE WITHIN 540 NM N...720 NM W AND 660 NM S 
AND SE QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 23 FT...EXCEPT SE 
QUADRANT SEAS 8 TO 14 FT. 
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 50N152W 981 MB. 
FROM 40N TO 47N BETWEEN 147W AND 161W WINDS 35 TO 45 KT. SEAS 12 
TO 25 FT. ELSEWHERE WITHIN 660 NM E SEMICIRCLE AND 840 NM 
SW...600 NM W AND 420 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 9 
TO 22 FT...HIGHEST NEAR 37N165W. 

...STORM WARNING... 
.LOW 55N134W 990 MB MOVING NE 10 KT. E OF A FRONT FROM LOW TO 
49N127W WINDS 35 TO 50 KT. SEAS 12 TO 21 FT. ELSEWHERE WITHIN 
240 NM SW AND 360 NM S QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 18 
FT. ALSO S OF 58N AND N OF A LINE FROM 43N124W TO 30N140W TO 
30N151W WINDS 20 TO 30 KT. SEAS 8 TO 17 FT IN MIXED 
SWELL...HIGHEST NEAR 45N130W.
.24 HOUR FORECAST LOW DISSIPATED INLAND. FROM 42N TO 53N E OF 
132W WINDS TO 25 KT. SEAS TO 12 FT. 
.48 HOUR FORECAST FROM 30N TO 37N E OF 125W WINDS TO 25 KT. SEAS 
TO 9 FT. 

...STORM WARNING... 
.LOW 49N167W 983 MB MOVING E 10 KT. WITHIN 180 NM N AND 240 NM W 
QUADRANTS WINDS 35 TO 50 KT. SEAS 10 TO 20 FT...HIGHEST W 
QUADRANT. ELSEWHERE FROM 45N TO 53N BETWEEN 160W AND 179E AND 
WITHIN 360 NM E AND SE OF FRONT FROM 50N165W TO 43N162W TO 
34N168W WINDS 25 TO 40 KT. SEAS 8 TO 19 FT...HIGHEST NEAR 
46N178W. ALSO WITHIN 360 NM W OF FRONT WINDS LESS THAN 25 KT. 
SEAS TO 12 FT. 
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 49N161W 990 MB 
AND A NEW SECOND CENTER 57N154W 982 MB. WITHIN 240 NM W AND SW 
QUADRANTS OF FIRST CENTER AND WITHIN 360 NM NE QUADRANT OF 
SECOND CENTER WINDS 35 TO 50 KT. SEAS 12 TO 23 FT. 
ELSEWHERE...EXCEPT WHERE DESCRIBED WITH LOW 42N168W ABOVE...N OF 
46N TO 61N BETWEEN 145W AND 173W AND WITHIN 600 NM E AND SE 
QUADRANTS OF SECOND LOW WINDS 25 TO 40 KT SEAS 8 TO 19 
FT...EXCEPT IN THE BERING SEA SEAS 8 TO 14 FT. 
.48 HOUR FORECAST COMBINED LOW 61N152W 982 MB. N OF 54N BETWEEN 
154W AND 176W WINDS 25 TO 40 KT. SEAS 8 TO 15 FT.

...GALE WARNING...
.LOW 43N172W 991 MB MOVING NE 30 KT. WITHIN 240 NM S AND SW 
QUADRANTS WINDS 25 TO 35 KT. SEAS 10 TO 12 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY 
COMPLEX LOW 49N161W ABOVE. 

...GALE WARNING... 
.24 HOUR FORECAST NEW LOW 53N159E 1002 MB. N OF 42N W OF 168E 
WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. 
.48 HOUR FORECAST LOW MOVED WELL NW OF AREA WITH NEW LOW FORMING 
NEAR 53N174E 1009 MB. FROM 40N TO 52N BETWEEN 179E AND 171E 
WINDS WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. 

...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 
56N160W TO 58N178E...AND WITHIN COOK INLET. 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N AND NE OF A 
LINE FROM 57N158W TO 58N165W TO 63N175W. ELSEWHERE LIGHT TO 
MODERATE FREEZING SPRAY N AND NE OF A LINE FROM 56N160W TO 
59N180W AND WITHIN COOK INLET. 
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N AND NE OF A 
LINE FROM 57N158W TO 56N162W TO 62N175W. ELSEWHERE LIGHT TO 
MODERATE FREEZING SPRAY N OF A LINE FROM 55N158W TO 57N165W TO 
60N178W. 

.SYNOPSIS AND FORECAST.

.LOW 59N159W 1001 MB MOVING SE 10 KT. OVER THE BERING SEA 
BETWEEN 163W AND 177E AREA OF N WINDS 20 TO 30 KT. SEAS 8 TO 15 
FT... HIGHEST NEAR 58N173W.  
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY 
COMPLEX LOW IN THIRD STORM WARNING.  

.24 HOUR FORECAST EXCEPT WHERE DESCRIBED IN WARNINGS SECTION 
ABOVE...S OF 53N BETWEEN 165W AND 165E WINDS TO 25 KT. SEAS 8 TO 
21 FT IN MIXED SWELL. 
.48 HOUR FORECAST EXCEPT WHERE DESCRIBED IN WARNINGS SECTION 
ABOVE...S OF 50N BETWEEN 135W AND 177W WINDS 20 TO 30 KT. SEAS 8 
TO 17 FT IN MIXED SWELL.

.48 HOUR FORECAST FROM 30N TO 35N W OF 177W AREA OF E TO NE 
WINDS TO 25 KT. SEAS 9 TO 15 FT IN MIXED SWELL.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF 55N E OF 
138W...AND WITHIN 180 NM N OF A LINE FROM 50N158W TO 45N176W.
.24 HOUR FORECAST DENSE FOG FROM 56N TO 60N BETWEEN 143W AND 
163W...WITHIN 120 NM NW OF A LINE FROM 46N165W TO 53N155W...AND 
N OF 47N W OF 164E.
.48 HOUR FORECAST DENSE FOG N OF 47N BETWEEN 147W AND 
153W...FROM 42N TO 50N BETWEEN 157W AND 159W...AND WITHIN 120 NM 
NE OF A LINE FROM 55N171E TO 48N177E. 

.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 SUN DEC 10.
24 HOUR FORECAST VALID 0000 UTC MON DEC 11.
48 HOUR FORECAST VALID 0000 UTC TUE DEC 12.

.WARNINGS.

...STORM WARNING...
.06 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 14N95W TO
14N94W TO 15N94W TO 16N94W...INCLUDING THE GULF OF
TEHUANTEPEC...NW TO N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15.5N95W TO 
15.5N94W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 
30 TO 40 KT. SEAS TO 8 FT...BUILDING RAPIDLY. WITHIN 15.5N95W TO 
15.5N94W TO 15N94W TO 15N95W TO 15.5N95W N WINDS 20 TO 30 KT. 
SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 15N94W TO 16N95W TO 16N96W TO 14N96W TO
14N94W TO 15N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 
35 TO 50 KT. SEAS 12 TO 16 FT. WITHIN 14N94W TO 14N96W TO 13N96W 
TO 13N95W TO 14N94W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 
.36 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N97W TO 13N96W TO 
13N95W TO 15N93W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...
N TO NE WINDS 30 TO 45 KT. SEAS 12 TO 14 FT. WITHIN 14N92W TO 
13N96W TO 15N97W TO 11N101W TO 10N99W TO 11N94W TO 14N92W NE 
WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 
.48 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO
14N96W TO 15N94W TO 16N94W...INCLUDING THE GULF OF 
TEHUANTEPEC... N TO NE WINDS 30 TO 40 KT. SEAS 8 TO 12 FT. WITHIN
15N93W TO 14N96W TO 15N97W TO 14N99W TO 11N99W TO 12N95W TO 
15N93W NE WINDS 20 TO 30 KT. SEAS 12 TO 14 FT. WITHIN 14N93W TO 
11N97W TO 14N99W TO 09N103W TO 08N94W TO 10N92W TO 14N93W WINDS 
20 KT OR LESS. SEAS 8 TO 12 FT IN N TO NE SWELL.

.SYNOPSIS AND FORECAST.

.WITHIN 31N114W TO 30N114W TO 27N112W TO 24N111W TO 26N110W TO
31N114W...INCLUDING THE GULF OF CALIFORNIA... NW TO N WINDS 20
TO 30 KT. SEAS TO 9 FT.
.24 HOUR FORECAST WITHIN 28N111W TO 31N113W TO 31N115W TO 
23N109W TO 24N108W TO 28N111W...INCLUDING THE GULF OF 
CALIFORNIA... NW TO N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.WITHIN 18N130W TO 19N140W TO 07N140W TO 07N130W TO 18N130W NE
TO E WINDS 20 TO 25 KT. SEAS 11 TO 13 FT. WITHIN 30N116W TO 
30N140W TO 00N140W TO 03S94W TO 30N116W...INCLUDING SEBASTIAN 
VIZCAINO BAY AND WITHIN 60 NM OF SHORE... WINDS 20 KT OR LESS. 
SEAS 8 TO 11 FT IN NW TO N SWELL.
.24 HOUR FORECAST WITHIN 09N136W TO 12N136W TO 12N140W TO 
05N140W TO 05N136W TO 09N136W NE TO E WINDS 20 TO 25 KT. SEAS 9 
TO 11 FT. WITHIN 02N114W TO 02N136W TO 00N136W TO 03.4S120W TO 
02S120W TO 03.4S114W TO 02N114W WINDS 20 KT OR LESS. SEAS 8 TO 10
FT IN SE SWELL. WITHIN 16N117W TO 25N140W TO 11N140W TO 05N131W 
TO 10N118W TO 16N117W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE 
SWELL.
.48 HOUR FORECAST WITHIN 14N122W TO 14N130W TO 21N140W TO 
04N140W TO 05N134W TO 11N122W TO 14N122W WINDS 20 KT OR LESS. 
SEAS 8 TO 10 FT IN NE TO E SWELL.

.WITHIN 11N86W TO 12N87W TO 11N88W TO 10N89W TO 10N88W TO 10N86W
TO 11N86W...INCLUDING THE GULF OF PAPAGAYO... NE TO E WINDS 20
TO 25 KT. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.
.36 HOUR FORECAST WITHIN 11N86W TO 12N87W TO 11N88W TO 10N89W TO
10N88W TO 10N86W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...
NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

CONVECTION VALID AT 0300 UTC SUN DEC 10...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 08N78W TO 06N89W. THE ITCZ 
EXTENDS FROM 06N89W TO 08N120W TO BEYOND 06N140W. SCATTERED 
MODERATE AND ISOLATED STRONG IS CONVECTION NOTED FROM 05N-10N 
BETWEEN 115W-135W.

$$
.FORECASTER LANDSEA. NATIONAL HURRICANE CENTER.