HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0545 UTC SUN DEC 21 2025
CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 21.
24 HOUR FORECAST VALID 0000 UTC DEC 22.
48 HOUR FORECAST VALID 0000 UTC DEC 23.
.WARNINGS.
...STORM WARNING...
.S OF 36N BETWEEN 180W AND 165W WINDS 25 TO 35 KT. SEAS 2.5 TO 4
M.
.24 HOUR FORECAST LOW 30N179E 1002 MB. FROM 30N TO 42N BETWEEN
165E AND 164W WINDS 25 TO 40 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST LOW 35N178E 1000 MB. WITHIN 540 NM NE QUADRANT
WINDS 40 TO 50 KT. SEAS 4 TO 7 M. ELSEWHERE FROM 30N TO 45N
BETWEEN 169E TO 161W WINDS 25 TO 40 KT. SEAS 2.5 TO 5.5 M.
...STORM WARNING...
.LOW 40N172E 1014 MB MOVING SW 25 KT. WITHIN 120 NM W SEMICIRCLE
WINDS 35 TO 45 KT. SEAS 4 TO 5.5 M. ELSEWHERE S OF A LINE FROM
38N163E TO 48N172E TO 42N180W WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5
M.
.06 HOUR FORECAST LOW 39N170E 1006 MB WITHIN 120 NM W SEMICIRCLE
WINDS 40 TO 50 KT. SEAS 5 TO 6.5 M.
.24 HOUR FORECAST LOW 31N165E 1014 MB. WITHIN 420 NM W SEMICIRCLE
WINDS 25 TO 35 KT. SEAS 2.5 TO 5.5 M.
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS S OF AREA.
...GALE WARNING...
.COMPLEX LOW WITH MEAN CENTER 52N139W 1001 MB MOVING E 05 KT.
WITHIN 480 NM S...AND 600 NM SW OF A LINE FROM 61N151W TO 50N142W
TO 46N131W WINDS 25 TO 40 KT. SEAS 2.5 TO 5.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 52N136W 994 MB.
WITHIN 480 NM N...840 NM S...AND 960 NM W QUADRANTS WINDS 25 TO
40 KT. SEAS 2.5 TO 6 M...HIGHEST W QUADRANT.
.48 HOUR FORECAST COMBINED LOW 50N130W 990 MB. WITHIN 480 NM
N...AND 540 NM S SEMICIRCLES...AND WITHIN 660 NM SW...AND 600 NM
W OF A LINE FROM 60N161W TO 40N137W WINDS 25 TO 35 KT. SEAS 2.5
TO 5.5 M.
...GALE WARNING...
.W OF A LINE FROM 60N170W TO 43N160E WINDS 25 TO 35 KT. SEAS 2.5
TO 4 M.
.24 HOUR FORECAST LOW 61N173E 1001 MB. W OF A LINE FROM 62N174W
TO 53N173W TO 42N160E WINDS 25 TO 40 KT. SEAS 2.5 TO 5 M.
.48 HOUR FORECAST LOW 64N166W 1010 MB. WITHIN 660 NM S QUADRANT
WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M.
...GALE WARNING...
.48 HOUR FORECAST LOW 59N166E 997 MB WITHIN 660 NM SE...AND 900
NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS 2.5 TO 5 M.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY WITHIN COOK INLET. LIGHT TO
MODERATE FREEZING SPRAY NE OF A LINE FROM 55N155W TO 61N178W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY WITHIN COOK
INLET. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF A LINE
FROM 53N132W TO 55N160W TO 58N167W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 55N E OF
152W.
.SYNOPSIS AND FORECAST.
.24 HOUR FORECAST DENSE FOG VSBY OCCASIONALLY LESS THAN 1 NM N OF
57N W OF 173W.
.48 HOUR FORECAST DENSE FOG N OF 59N W OF 173W.
.FORECASTER BYRD. 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 SUN DEC 21.
24 HOUR FORECAST VALID 0000 UTC MON DEC 22.
48 HOUR FORECAST VALID 0000 UTC TUE DEC 23.
.WARNINGS.
...GALE WARNING...
.WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO 14N95W TO 15N94W
TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25
KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N95W TO 15N94W TO
16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 35
KT. SEAS TO 2.5 M. ELSEWHERE WITHIN 16N94W TO 16N95W TO 15N96W TO
13N96W TO 14N95W TO 14N94W TO 16N94W N TO NE WINDS 20 TO 30 KT.
SEAS LESS THAN 2.5 M.
.SYNOPSIS AND FORECAST.
.WITHIN 30N138W TO 30N140W TO 29N140W TO 30N138W WINDS 20 KT OR
LESS. SEAS TO 2.5 M IN NW TO N SWELL.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.36 HOUR FORECAST WITHIN 30N138W TO 30N140W TO 29N140W TO
30N138W N TO NE WINDS 20 TO 25 KT. SEAS 2.5 TO 3 M IN N SWELL.
.48 HOUR FORECAST WITHIN 30N131W TO 30N140W TO 26N140W TO
29N135W TO 30N131W N TO NE WINDS 20 TO 25 KT. SEAS 2.5 TO 3.5 M
IN NW TO N SWELL.
.WITHIN 11N86W TO 12N88W TO 11N89W TO 10N88W TO 10N86W TO
11N86W...INCLUDING THE GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25
KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.
.WITHIN 09N136W TO 11N137W TO 11N140W TO 07N140W TO 07N138W TO
08N136W TO 09N136W WINDS 20 KT OR LESS. SEAS TO 2.5 M IN NE TO E
SWELL.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 0300 UTC SUN DEC 21...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 07N78W TO 08N97W. ITCZ FROM 08N97W TO BEYOND
07N140W. ISOLATED MODERATE FROM 09N TO 15N BETWEEN 101W AND 125W.
.FORECASTER DELGADO. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E
SYNOPSIS VALID 0000 UTC DEC 21 2025.
24 HOUR FORECAST VALID 0000 UTC DEC 22 2025.
48 HOUR FORECAST VALID 0000 UTC DEC 23 2025.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.COMPLEX LOW DEVELOPING WITH FIRST LOW NEAR 28N175W 1008 MB. WARM
FRONT FROM LOW TO 30N174W...AND FROM 30N171W 27N167W 26N165W
26N163W
THENCE STATIONARY FRONT TO 26N157W 27N154W. WARM FRONT MOVING N
SLOWLY. SE WINDS 20 TO 30 KT N OF A LINE 27N166W 30N175W.
SCATTERED
MODERATE TO STRONG TSTMS WITHIN 120 NM S OF WARM FRONT W OF 165W.
.24 HOUR FORECAST FIRST LOW MOVED N OF AREA. NEW LOW 28N180E 1002
MB.
NEW TROUGH 28N171W 20N174W 11N177E. WARM FRONT MOVED N OF AREA. S
TO
SE WINDS 20 TO 30 KT N OF 18N BETWEEN 162W AND 180E. N TO NE WINDS
20 TO 25 KT NW OF A LINE 30N177E 20N174E 09N160E.
.48 HOUR FORECAST LOW 29N173E 996 MB. TROUGH 30N171W 23N172W
14N178E. S
S WINDS 20 TO 30 KT N OF 20N BETWEEN 160W AND 173E. N TO NW
WINDS 20 TO 30 KT N OF 21N BETWEEN 174E AND 166E.
.COLD FRONT 30N176E 26N175E 21N172E 17N166E MOVING E 15 KT. N TO
NE
WINDS 20 TO 30 KT AND SEAS 3 TO 5 M N OF A LINE 30N176E 20N170E
14N160E. NUMEROUS MODERATE TO STRONG TSTMS WITHIN 150 NM OF FRONT
N
OF 25N. ISOLATED MODERATE TSTMS ELSEWHERE WITHIN 210 NM NW OF
FRONT
N OF 20N.
.24 HOUR FORECAST FRONT MERGED WITH COMPLEX LOW SYSTEM ABOVE.
.TROUGH 23N175W 21N179E 16N174E 15N170E MOVING E SLOWLY. ISOLATED
MODERATE TSTMS WITHIN 240 NM N...AND 90 NM S OF TROUGH.
.24 HOUR FORECAST TROUGH MERGED WITH COMPLEX SYSTEM ABOVE.
.COLD FRONT 30N144W 28N148W 27N153W MOVING E 15 KT.
.24 HOUR FORECAST COLD FRONT 27N140W 24N145W.
.48 HOUR FORECAST COLD FRONT MOVED E OF AREA.
.48 HOUR FORECAST ENE WINDS 20 TO 25 KT N OF 14N BETWEEN 150W AND
160W...AND N OF 23N E OF 150W.
.SEAS 2.5 TO 3 M OVER ENTIRE FORECAST AREA...EXCEPT S OF 16N W OF
180E...AND E OF 145W.
.24 HOUR FORECAST SEAS 3 TO 4.5 M NW OF A LINE 30N172W 07N160E.
SEAS
2.5 TO 3 M FROM 04N TO 18N BETWEEN 146W AND 173W...AND N OF 28N
BETWEEN 161W AND 172W.
.48 HOUR FORECAST SEAS 3 TO 5 M N OF A LINE 25N160W 28N180W
17N177E
17N163E. SEAS 2.5 TO 3 M FROM 04N TO 18N BETWEEN 150W AND
170W...AND
ELSEWHERE NW OF A LINE 20N170W 05N160E.
.WINDS 20 KT OR LESS AND SEAS 2.5 M OR LOWER OVER REMAINDER OF
FORECAST AREA.
.ITCZ 07N140W 07N150W 06N161W 10N180W 10N172E 05N163E 04N160E.
ISOLATED MODERATE TSTMS WITHIN 150 NM OF ITCZ W OF 155W.
.ISOLATED MODERATE TSTMS FROM 12N TO 18N BETWEEN 170W AND
178W...AND
FROM 20N TO 23N BETWEEN 163W AND 169W.
$$
.FORECASTER TSAMOUS. HONOLULU HI.=