High Seas Forecast
Issued by NWS

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FZPN02 KWBC 212325
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2345 UTC THU MAR 21 2024

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

FROM APRIL 1 TO OCTOBER 15, DUE TO THE CLIMATOLOGY OF THE NORTH
PACIFIC, HIGH SEAS FORECASTS WILL ONCE AGAIN INCLUDE ALL
FORECASTS OF WINDS 20 TO 30 KNOTS AND SEAS 8 FEET OR GREATER.
ALSO, PLEASE SEE HTTPS://OCEAN.WEATHER.GOV/PROPOSED_HIGH_SEAS
_TROPICAL.PHP FOR A PROPOSAL, AND A REQUEST FOR COMMENTS, TO
INCREASE READABILITY OF THE HIGH SEAS FORECAST (WEB ADDRESS
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 MAR 21.
24 HOUR FORECAST VALID 1800 UTC MAR 22.
48 HOUR FORECAST VALID 1800 UTC MAR 23.

.WARNINGS.

...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 38N160E 973 MB MOVING NE 30 KT AND
SECOND CENTER 42N171E 985 MB MOVING NE 20 KT. WITHIN 360 NM S
SEMICIRCLE OF MAIN CENTER WINDS 40 TO 50 KT. SEAS 17 TO 31 FT.
ELSEWHERE W OF A LINE FROM 48N167E TO 42N180W TO 30N178E WINDS 25
TO 40 KT. SEAS 10 TO 25 FT...HIGHEST NEAR AND S OF CENTER.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 45N177E 976 MB.
BETWEEN 180 NM AND 540 NM S QUADRANT OF MEAN CENTER WINDS 40 TO
50 KT. SEAS 18 TO 32 FT. ELSEWHERE WITHIN AN AREA BOUNDED BY A
LINE FROM 44N160E TO 53N177E TO 49N154W TO 40N154W TO 30N176W TO
44N160E WINDS 25 TO 40 KT. SEAS 10 TO 25 FT...HIGHEST S OF MEAN
CENTER.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 50N175W 979 MB AND
SECOND CENTER 53N165W 980 MB. WITHIN AN AREA BOUNDED BY A LINE
FROM 30N180W TO 41N162W TO 52N164E TO 62N177W TO 60N151W TO
55N145W TO 39N145W TO 30N172W TO 30N180W WINDS 25 TO 40 KT. SEAS
10 TO 20 FT...EXCEPT SEAS 15 TO 26 FT WITHIN 420 NM OF 43N174W.
ELSEWHERE S OF 40N W OF 180W WINDS LESS THAN 25 KT. SEAS 8 TO 14
FT IN MIXED SWELL.

...GALE WARNING...
.LOW 40N135W 1006 MB MOVING NE 10 KT. WITHIN AN AREA BOUNDED BY A
LINE FROM 36N140W TO 43N145W TO 49N142W TO 46N128W TO 35N130W TO
36N140W WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 41N130W 1000 MB. WITHIN 360 NM S...AND 420
NM W QUADRANTS WINDS 25 TO 35 KT. SEAS 10 TO 18 FT. ELSEWHERE
WITHIN AN AREA BOUNDED BY A LINE FROM 34N129W TO 34N138W TO
40N142W TO 50N138W TO 48N126W TO 43N123W TO 34N129W WINDS 20 TO
30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW 42N126W 1001 MB. WITHIN 540 NM SW
SEMICIRCLE WINDS 25 TO 35 KT. SEAS 8 TO 17 FT.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 55N167W 994 MB MOVING N 25 KT.
WITHIN 420 NM NE...AND 660 NM SE QUADRANTS WINDS 25 TO 35 KT.
SEAS 8 TO 17 FT.
.24 HOUR FORECAST LOW 65N167W 995 MB. FROM 53N TO 57N BETWEEN
150W AND 160W WINDS LESS THAN 25 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW WELL N OF AREA. ASSOCIATED CONDITIONS
DIMINISHED.

.SYNOPSIS AND FORECAST.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF 53N BETWEEN
171W AND 165W...AND FROM 40N TO 43N W OF 180W.
.24 HOUR FORECAST DENSE FOG FROM 43N TO 52N BETWEEN 170E AND
158W.
.48 HOUR FORECAST DENSE FOG WITHIN 600 NM NW OF A LINE FROM
44N178E TO 54N150W...AND FROM 40N TO 50N BETWEEN 159W AND 147W.

.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 1800 UTC THU MAR 21.
24 HOUR FORECAST VALID 1800 UTC FRI MAR 22.
48 HOUR FORECAST VALID 1800 UTC SAT MAR 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 09N121W TO 11N125W TO 09N131W TO 06N133W TO 05N127W TO
08N121W TO 09N121W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE TO
E SWELL.
.24 HOUR FORECAST WITHIN 10N122W TO 12N130W TO 11N135W TO
09N138W TO 06N130W TO 08N123W TO 10N122W WINDS 20 KT OR LESS.
SEAS 8 TO 10 FT IN N TO NE SWELL.
.48 HOUR FORECAST WITHIN 12N129W TO 12N140W TO 04N140W TO
05N126W TO 07N121W TO 12N129W WINDS 20 KT OR LESS. SEAS 8 TO 10
FT IN N TO NE SWELL.

.24 HOUR FORECAST WITHIN 30N135W TO 30N140W TO 27N140W TO
29N138W TO 30N135W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN W TO
NW SWELL.
.48 HOUR FORECAST WITHIN 30N126W TO 30N140W TO 21N140W TO
22N137W TO 26N135W TO 27N130W TO 30N126W WINDS 20 KT OR LESS.
SEAS 8 TO 10 FT IN NW SWELL.

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

CONVECTION VALID AT 1800 UTC THU MAR 21...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH EXTENDS FROM THE COAST OF COLOMBIA NEAR 07N77W
TO 05N101W. THE ITCZ CONTINUES FROM 05N101W TO 06N110W...AND
THEN FROM 04N119W TO BEYOND 02N140W. A TROUGH EXTENDS FROM
02N116W TO 08N112W. SCATTERED MODERATE CONVECTION IS NOTED FROM
02N TO 09N BETWEEN 92W AND 107W.

.FORECASTER KONARIK. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1800 UTC MAR 21 2024.
24 HOUR FORECAST VALID 1800 UTC MAR 22 2024.
48 HOUR FORECAST VALID 1800 UTC MAR 23 2024.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT 30N167E 25N160E MOVING E 25 KT. SW WINDS 20 TO 30
KT WITHIN 270 NM E OF FRONT N OF 26N. W WINDS 20 TO 30 KT
W OF FRONT. SEE SEAS BELOW.
.24 HOUR FORECAST FRONT 30N176E 18N160E. SW WINDS 20 TO 25 KT
WITHIN 120 NM E OF FRONT N OF 28N. SEE SEAS BELOW.
.48 HOUR FORECAST FRONT 30N178W 22N171E 18N160E. SW WINDS 20 TO
25 KT WITHIN 90 NM E OF FRONT N OF 26N. SEE SEAS BELOW.

.WEAK FRONT 29N140W 25N153W MOVING S 10 KT.
.24 HOUR FORECAST FRONT DISSIPATED.

.WINDS NE TO E 20 TO 25 KT FROM 18N TO 09N BETWEEN
165W AND 175W.
.24 HOUR FORECAST WINDS NE 20 TO 30 KT E OF LINE 26N140W 19N179E
08N178E 02N140W.
.48 HOUR FORECAST WINDS 20 TO 30 KT E OF LINE 25N140W 24N158W
09N179W 00N155W.

.OTHERWISE...WINDS 20 KT OR BELOW OVER REMINDER OF FORECAST AREA.

.SEAS 18 TO 21 FT N OF LINE 30N162W 28N160E. SEAS 12 TO 18 FT
ELSEWHERE N OF A LINE 30N167E 26N160E. SEAS 8 TO 12 FT ELSEWHERE
N OF LINE 30N171W 21N174E 24N160E.
.24 HOUR FORECAST SEAS 12 TO 18 FT N OF LINE 30N175E 24N170E
18N160E. SEAS 8 TO 12 FT ELSEWHERE N OF LINE 30N179E 16N160E.
 SEAS 8 TO 10 FT FROM 23N TO 11N BETWEEN 168W AND 178E. SEAS
8 TO 9 FT FROM 08N TO 03N BETWEEN 145W AND 152W.
.48 HOUR FORECAST SEAS 12 TO 14 FT N OF 22N BETWEEN 172W AND
175E. SEAS 8 TO 12 FT ELSEWHERE BOUNDED BY AREA 30N160E 30N169W
17N177W 27N160W 21N140W 17N140W 06N159W 07N178E 12N172E 10N160E
30N160E. SEAS 8 TO 12 FT S OF 07N E OF 156W.

.OTHERWISE...SEAS 8 FT OR LOWER OVER REMINDER OF FORECAST AREA.

.ITCZ 02N140W 02N154W. ISOLATED MODERATE TSTMS WITHIN 300 NM
OF ITCZ.

ISOLATED MODERATE TSTMS S OF 05N BETWEEN 178E AND 167E.

$$

.FORECASTER THOMAS. HONOLULU HI.


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