North Pacific High Seas Forecast

Hurricane Warnings in Effect
North Pacific High Seas Forecast

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FZPN01 KWBC 210932
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1030 UTC SAT DEC 21 2024 

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 0600 UTC DEC 21. 
24 HOUR FORECAST VALID 0600 UTC DEC 22. 
48 HOUR FORECAST VALID 0600 UTC DEC 23. 

.WARNINGS. 

...HURRICANE FORCE WIND WARNING...
.COMPLEX LOW WITH MAIN CENTER 42N166W 946 MB MOVING E 35 KT AND 
WILL TURN NE AFTER 12 HOURS AND SECOND LOW 42N158W 965 MB MOVING 
NE 25 KT. WITHIN 540 NM S SEMICIRCLE OF FIRST LOW WINDS 50 TO 70 
KT. SEAS 33 TO 65 FT. ALSO FROM 32N TO 45N BETWEEN 153W AND 175W 
WINDS 40 TO 50 KT. SEAS 25 TO 50 FT. AND S OF 46N BETWEEN 151W 
AND 179W WINDS 25 TO 40 KT. SEAS 15 TO 30 FT. ELSEWHERE S OF 48N 
BETWEEN 151W AND 180W WINDS 20 TO 30 KT. SEAS 15 TO 30 
FT...EXCEPT 9 TO 18 FT FROM 46N TO 48N.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 45N146W 960 MB 
AND SECOND LOW 48N148W 960 MB. WITHIN 480 NM S SEMICIRCLE OF 
FIRST LOW AND FROM 38N TO 53N BETWEEN 131W AND 138W WINDS 40 TO 
60 KT.  SEAS 24 TO 48 FT. WINDS AND SEAS HIGHEST WITHIN 480 NM S 
SEMICIRCLE OF FIRST LOW. ALSO FROM 32N TO 53N BETWEEN 128W AND 
155W WINDS 25 TO 40 KT. SEAS 20 TO 40 FT...HIGHEST WITHIN 840 NM 
S SEMICIRCLE OF FIRST LOW. AND S OF 53N BETWEEN 128W AND 155W 
WINDS 20 TO 30 KT. SEAS 15 TO 30 FT. ELSEWHERE WITHIN 1320 NM SE 
QUADRANT OF FIRST LOW WINDS TO 25 KT. SEAS 10 TO 20 FT IN W TO 
NW SWELL.
.48 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 55N143W 970 MB 
AND SECOND CENTER 57N153W 966 MB. N AND NE OF A LINE FROM 
58N154W TO 59N147W TO 53N131W WINDS 40 TO 50 KT. SEAS 14 TO 28 
FT. ALSO NE OF A LINE FROM 57N155W TO SECOND LOW TO FIRST LOW TO 
50N137W TO 50N130W WINDS 25 TO 40 KT. SEAS 14 TO 28 FT. AND 
WITHIN 900 NM SE QUADRANT OF FIRST LOW WINDS 20 TO 30 KT. SEAS 
17 TO 34 FT. ELSEWHERE WITHIN 600 NM SW QUADRANT OF FIRST LOW 
AND 780 NM SW QUADRANT OF SECOND LOW WINDS 20 TO 30 KT. SEAS 10 
TO 20 FT...EXCEPT 8 TO 16 FT SW QUADRANT OF SECOND LOW.

...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 52N149W 959 MB MOVING NW 15 
KT...SECOND LOW 48N139W 970 MB MOVING NE 25 KT...AND THIRD LOW 
45N136W 978 MB MOVING NE 20 KT. WITHIN 240 NM EITHER SIDE OF A 
LINE FROM 57N150W TO 39N130W WINDS 35 TO 50 KT. SEAS 16 TO 32 
FT. ALSO NE OF A LINE FROM 55N160W TO 33N133W WINDS 25 TO 40 KT. 
SEAS 14 TO 28 FT. ELSEWHERE WITHIN 120 NM SW QUADRANT OF THIRD 
LOW AREA OF SW TO W WINDS 20 TO 30 KT. SEAS 12 TO 24 FT.
.24 HOUR FORECAST LOW 55N160W 962 MB AND SECOND LOW 56N139W 976 
MB WITH THIRD LOW DISSIPATED. NE OF A LINE FROM 60N148W TO 
SECOND LOW TO 53N135W AREA OF E TO SE WINDS 40 TO 50 KT. SEAS 15 
TO 30 FT. ALSO WITHIN 600 NM NW AND 360 NM NE QUADRANTS OF FIRST 
LOW...AND WITHIN 420 NM NW AND 180 NM SE QUADRANTS OF SECOND LOW 
WINDS 25 TO 40 KT. SEAS 11 TO 22 FT...EXCEPT 9 TO 18 FT WITHIN 
600 NW QUADRANT OF FIRST LOW.
.48 HOUR FORECAST LOW 56N168W 974 MB WITH SECOND LOW DISSIPATED. 
N AND NW OF A LINE FROM 59N179W TO 63N169W AREA OF NE WINDS 35 
TO 50 KT. SEAS 12 TO 21 FT. ALSO BETWEEN 240 NM AND 420 NM NW 
AND BETWEEN 300 NM AND 480 NM W QUADRANTS WINDS 25 TO 35 KT. 
SEAS 10 TO 20 FT. ELSEWHERE WITHIN 240 NM NE AND 540 NM W 
QUADRANTS...AND WITHIN 240 NM S SEMICIRCLE WINDS 20 TO 30 KT. 
SEAS 8 TO 16 FT.

...STORM WARNING...
.EXCEPT AS DESCRIBED WITH LOW 52N164E BELOW...FROM 36N TO 45N 
BETWEEN 179E AND 164E AREA OF W TO NW WINDS 25 TO 40 KT. SEAS 12 
TO 24 FT. ELSEWHERE S OF 49N BETWEEN 180W AND 164E WINDS 20 TO 
30 KT. SEAS 9 TO 18 FT.
.24 HOUR FORECAST NEW LOW 41N163W 987 MB. WITHIN 180 NM S 
SEMICIRCLE AREA OF W TO NW WINDS 40 TO 50 KT. SEAS 15 TO 30 FT. 
ALSO FROM 33N TO 47N BETWEEN 158W AND 174E AREA OF W TO NW WINDS 
25 TO 40 KT. SEAS 12 TO 24 FT. ELSEWHERE S OF 50N BETWEEN 158W 
AND 170W WINDS 20 TO 30 KT. SEAS 12 TO 24 FT.
.48 HOUR FORECAST LOW 45N144W 990 MB. S OF 42N BETWEEN 138W AND 
161W WINDS 30 TO 45 KT. SEAS 14 TO 28 FT. ALSO S OF 47N BETWEEN 
138W AND 170W WINDS 20 TO 30 KT. SEAS 12 TO 24 FT. ELSEWHERE 
WITHIN 1440 NM SE QUADRANT WINDS TO 25 KT. SEAS 10 TO 20 FT IN W 
TO NW SWELL.

...STORM WARNING...
.18 HOUR FORECAST LOW W OF AREA 42N155E 982 MB. W OF A LINE FROM 
35N160E TO 39N163E TO 43N163E AREA OF SE TO S WINDS 25 TO 40 KT. 
SEAS 9 TO 18 FT.
.24 HOUR FORECAST LOW W OF AREA 42N156E 974 MB. WITHIN 420 NM SE 
QUADRANT AREA OF S WINDS 40 TO 50 KT. SEAS 12 TO 22 FT. ALSO 
WITHIN 360 NM NE AND 600 NM SE QUADRANTS WINDS 25 TO 40 KT. SEAS 
9 TO 18 FT. AND WITHIN 840 NM SE QUADRANT WINDS 20 TO 30 KT. 
SEAS TO 12 FT. ELSEWHERE WITHIN 600 NM NE QUADRANT WINDS TO 25 
KT. SEAS 8 TO 16 FT.
.48 HOUR FORECAST LOW 46N165E 944 MB. WITHIN 360 NM NW...420 NM 
NE AND SW...AND 900 NM SE QUADRANTS WINDS 40 TO 60 KT...HIGHEST 
WITHIN 360 NM S SEMICIRCLE OF LOW. SEAS 20 TO 40 FT. ALSO WITHIN 
540 NM NE...1080 NM SE...AND 960 NM S QUADRANTS WINDS 25 TO 40 
KT. SEAS 14 TO 28 FT. ELSEWHERE WITHIN 660 NM NE AND 1320 NM SE 
QUADRANTS WINDS 20 TO 30 KT. SEAS 11 TO 22 FT.

...GALE WARNING...
.LOW 57N169W 982 MB MOVING W 20 KT AND WILL TURN SW AFTER 12 
HOURS. N AND NW OF A LINE FROM 59N178W TO 63N169W AREA OF NE 
WINDS 25 TO 40 KT. SEAS 9 TO 18 FT.
.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED WITH LOW 
55N160W ABOVE.

...GALE WARNING...
.LOW JUST NW OF AREA 52N164E 985 MB MOVING SE 15 KT. WITHIN 480 
NM S QUADRANT AREA OF NW WINDS 25 TO 40 KT. SEAS 10 TO 20 FT.
.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED WITH LOW 
42N156E ABOVE.

...HEAVY FREEZING SPRAY WARNING... 
.MODERATE TO HEAVY FREEZING SPRAY N OF A LINE FROM 60N167W TO 
63N173W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF A LINE 
FROM 60N165W TO 62N176W. 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE 
FROM 60N164W TO 63N174W. ELSEWHERE LIGHT TO MODERATE FREEZING 
SPRAY N OF A LINE FROM 59N162W TO 61N176W. 
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE 
FROM 60N166W TO 62N175W. ELSEWHERE LIGHT TO MODERATE FREEZING 
SPRAY N OF 59N W OF ALASKA. 

.SYNOPSIS AND FORECAST. 

.DENSE FOG. VSBY OCCASIONALLY 1 NM OR LESS FROM 55N TO 63N W OF 
168W...FROM 52N TO 57N BETWEEN 158W AND 161W...FROM 47N TO 49N 
BETWEEN 139W AND 142W...FROM 44N TO 46N BETWEEN 156W AND 
171W...AND WITHIN 90 NM EITHER SIDE OF A LINE FROM 49N179E TO 
44N176W.
.24 HOUR FORECAST DENSE FOG FROM 43N TO 46N W OF 168E...WITHIN 
90 NM OF 47N174W AND 60N147W...WITHIN 120 NM NE OF A LINE FROM 
58N179E TO 52N170W...AND FROM 55N TO 59N BETWEEN 160W AND 172W.
.48 HOUR FORECAST DENSE FOG WITHIN 120 NM EITHER SIDE OF A LINE 
FROM 60N178W TO 53N167W...WITHIN 90 NM EITHER SIDE OF A LINE 
FROM 61N168W TO 57N159W...FROM 45N TO 51N W OF 163E...FROM 49N 
TO 52N BETWEEN 173E AND 163E...AND WITHIN 90 NM OF 60N147W.

.FORECASTER FIGURSKEY. 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 SAT DEC 21.
24 HOUR FORECAST VALID 0600 UTC SUN DEC 22.
48 HOUR FORECAST VALID 0600 UTC MON DEC 23.

.WARNINGS.

...GALE WARNING...
.WITHIN 16N95W TO 16N96W TO 14N96W TO 13N96W TO 13N95W TO 14N94W
TO 16N95W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30
TO 40 KT. SEAS 10 TO 17 FT. ELSEWHERE WITHIN 15N93W TO 16N94W TO
16N96W TO 13N98W TO 12N97W TO 12N95W TO 15N93W N TO NE WINDS 20 
TO 30 KT. SEAS 8 TO 14 FT. REMAINDER OF AREA WITHIN 11N94W TO 
13N94W TO 15N96W TO 10N100W TO 09N97W TO 10N95W TO 11N94W WINDS
20 KT OR LESS. SEAS 8 TO 11 FT IN N TO NE SWELL.
.24 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 14N96W TO
14N95W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE
WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. ELSEWHERE WITHIN 15N93W TO 
16N94W TO 16N96W TO 14N97W TO 12N96W TO 14N93W TO 15N93W N TO NE 
WINDS 20 TO 30 KT. SEAS 8 TO 13 FT. REMAINDER OF AREA WITHIN 
13N94W TO 15N97W TO 12N101W TO 08N102W TO 08N100W TO 09N95W TO 
13N94W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN N TO NE SWELL.
.48 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N97W TO 13N97W TO
13N95W TO 14N94W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC 
...N TO NE WINDS 20 TO 35 KT. SEAS 8 TO 12 FT. ELSEWHERE WITHIN 
11N96W TO 13N95W TO 13N98W TO 11N101W TO 09N101W TO 08N98W TO 
11N96W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN N TO NE SWELL.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N137W TO 28.5N140W. WITHIN 30N132W TO 30N135W
TO 29N135W TO 29N134W TO 29N132W TO 30N132W SW WINDS 20 TO 25 
KT. SEAS 13 TO 17 FT IN W TO NW SWELL. ELSEWHERE WITHIN 21N117W 
TO 20N130W TO 30N128W TO 30N140W TO 04N140W TO 07N126W TO 
21N117W WINDS 20 KT OR LESS. SEAS 8 TO 23 FT IN NW 
SWELL...HIGHEST NEAR
30N140W.
.24 HOUR FORECAST FRONT DISSIPATED. WITHIN 30N119W TO 30N140W TO
01N140W TO 12N121W TO 17N124W TO 30N119W WINDS 20 KT OR LESS. 
SEAS 8 TO 17 FT IN NW SWELL...HIGHEST NEAR 30N130W.
.48 HOUR FORECAST WITHIN 23N111W TO 29N114W TO 30N140W TO 
00N140W TO 00N132W TO 10N119W TO 23N111W...INCLUDING SEBASTIAN 
VIZCAINO BAY AND WITHIN 60 NM OF SHORE...WINDS 20 KT OR LESS.
SEAS 8 TO 22 FT IN NW SWELL...HIGHEST NEAR 30N140W.

.WITHIN 12N86W TO 11N88W TO 10N88W TO 09N89W TO 09N87W TO 10N86W
TO 12N86W...INCLUDING THE GULF OF PAPAGAYO...NE TO E WINDS 20
TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 0600 UTC SAT DEC 21...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N83.5W TO 05.5N93.5W. ITCZ FROM 05.5N93.5W
TO 08N114W TO BEYOND 08N140W. SCATTERED MODERATE FROM 05N TO 09N
BETWEEN 77W AND 83W...AND FROM 04N TO 07N BETWEEN 89W AND 100W.

$$

.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.