High Seas Forecast
Issued by NWS

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FZPN02 KWBC 242325
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2345 UTC TUE APR 24 2018

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SEE ANNOUNCEMENT OF PLANNED INMARSAT I-3 TO I-4 MIGRATION
IN 2018 AT OCEAN.WEATHER.GOV/GMDSS_NOTICE.PHP (LOWERCASE).

SECURITE

PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT
TO 50N 160E

SYNOPSIS VALID 1800 UTC APR 24.
24 HOUR FORECAST VALID 1800 UTC APR 25.
48 HOUR FORECAST VALID 1800 UTC APR 26.

.WARNINGS.

...GALE WARNING...
.LOW 57N172W 973 MB MOVING NE 15 KT. WITHIN 660 NM SE...960 NM S
AND SW...AND BETWEEN 240 NM AND 480 NM W QUADRANTS WINDS 25 TO
40 KT. SEAS 11 TO 22 FT...EXCEPT 8 TO 15 FT IN THE BERING SEA.
ALSO WITHIN 1500 NM SW QUADRANT WINDS TO 25 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH NEW LOW TO FORM 57N170W
996 MB. S OF THE ALEUTIANS WITHIN 540 NM SE QUADRANT WINDS 25 TO
35 KT. SEAS 10 TO 19 FT. ELSEWHERE WITHIN 1020 NM S SEMICIRCLE
WINDS TO 25 KT. SEAS 8 TO 15 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

...GALE WARNING...
.LOW 61N167W 972 MB MOVING NW 10 KT. FRONT EXTENDS FROM 58N155W
TO 51N156W TO 40N165W. WITHIN 420 NM E OF THE FRONT WINDS 25 TO
40 KT. SEAS 10 TO 20 FT. ELSEWHERE OVER ICE FREE WATERS WITHIN
180 NM NE SEMICIRCLE WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LOW 64N172W 979 MB. WITHIN 240 NM S AND 180 NM
NE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW MOVED NW OF AREA. OVER FORECAST WATERS N
OF 63N W OF ALASKA WINDS TO 25 KT. SEAS LESS THAN 8 FT.

...GALE WARNING...
.LOW 39N137W 1016 MB MOVING S 15 KT. WITHIN 240 NM W AND NW
QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 14 FT. ELSEWHERE WITHIN
360 NM W SEMICIRCLE WINDS TO 25 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 33N136W 1019 MB. WITHIN 420 NM W AND NW
QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

...GALE WARNING...
.48 HOUR FORECAST OVER FORECAST WATERS N OF 37N W OF 170E AREA
OF S TO SE WINDS 25 TO 40 KT. SEAS 8 TO 16 FT.

.SYNOPSIS AND FORECAST.

.LOW 43N126W 1014 MB MOVING W 05 KT. WITHIN 360 NM NW QUADRANT
WINDS TO 25 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 42N128W 1016 MB. WITHIN 660 NM N AND 480
NM NW QUADRANTS WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW 43N133W 1012 MB. WITHIN 420 NM W
SEMICIRCLE WINDS LESS THAN 25 KT. SEAS TO 10 FT.

.24 HOUR FORECAST LOW 43N166E 1020 MB. WITHIN 240 NM S
SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.48 HOUR FORECAST NEW LOW NW OF AREA 62N179W 996 MB. OVER
FORECAST WATERS WITHIN 720 NM S QUADRANT WINDS 20 TO 30 KT. SEAS
TO 11 FT.

.48 HOUR FORECAST WITHIN 180 NM NW OF A FRONT FROM 38N157W TO
30N169W WINDS TO 25 KT. SEAS TO 11 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 120 NM E OF
A LINE FROM 52N155W TO 45N159W.
.24 HOUR FORECAST CONDITIONS IMPROVED.

.DENSE FOG. 48 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM W
OF A LINE FROM 52N164E TO 45N171E TO 33N163E.

.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY OVER ICE FREE
FORECAST WATERS N OF 62N W OF ALASKA.
.48 HOUR FORECAST LIGHT FREEZING SPRAY N OF 62N W OF ALASKA.

.HIGH 47N142W 1034 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST HIGH 49N141W 1024 MB.

.HIGH 40N150W 1036 MB DRIFTING S.
.24 HOUR FORECAST HIGH 38N151W 1034 MB.
.48 HOUR FORECAST HIGH 36N149W 1028 MB.

.HIGH 37N170E 1032 MB MOVING E 20 KT.
.24 HOUR FORECAST HIGH 37N178E 1035 MB.
.48 HOUR FORECAST HIGH 40N178W 1038 MB.

.FORECASTER REINHART. 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 1800 UTC TUE APR 24.
24 HOUR FORECAST VALID 1800 UTC WED APR 25.
48 HOUR FORECAST VALID 1800 UTC THU APR 26.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N133W TO 27N140W. W OF LINE FROM 30N130W TO
23N140W WINDS 20 KT OR LESS. SEAS TO 10 FT IN NW SWELL.
.24 HOUR FORECAST  FRONT DISSIPATED. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.WITHIN AREA BOUNDED BY A LINE FROM 18N140W TO 12N126W TO
07N132W TO 07N140W TO 18N140W WINDS 20 KT OR LESS. SEAS TO 9 FT
IN NW SWELL.
.24 HOUR FORECAST FROM 07N TO 19N W OF 127W WINDS 20 KT OR LESS.
SEAS TO 8 FT.
.48 HOUR FORECAST FROM 09N TO 14N W OF 121W WINDS 20 KT OR LESS.
SEAS TO 8 FT.

.S OF LINE FROM 03.4S82W TO 02S120W WINDS 20 KT OR LESS. SEAS TO
8 FT IN S SWELL.
.24 HOUR FORECAST S OF LINE FROM 03.4S96W TO 02S120W WINDS 20 KT
OR LESS. SEAS TO 8 FT IN S SWELL.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.06 HOUR FORECAST FROM 10.5N TO 11.5N E OF 88W..INCLUDING THE
GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

CONVECTION VALID AT 2100 UTC TUE APR 24...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 10N85W TO 07N98W. ITCZ FROM 07N98W TO 09N118W TO
07N125W TO 07N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN
150 NM OF LINE FROM 07N78W TO 06N95W AND WITHIN 210 NM OF LINE
FROM 04N104W TO 11N119W.

.FORECASTER NELSON. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1800 UTC APR 24 2018.
24 HOUR FORECAST VALID 1800 UTC APR 25 2018.
48 HOUR FORECAST VALID 1800 UTC APR 26 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 28N140W TO 26N149W TO 25N155W MOVING S SLOWLY.
.24 HOUR FORECAST FRONT DISSIPATED.

.COLD FRONT FROM 30N179W TO 28N173E MOVING E 10 KT THENCE A
DISSIPATING STATIONARY FRONT TO 27N164E.
.24 HOUR FORECAST FRONT FROM 30N175W TO 28N173E.
.48 HOUR FORECAST FRONT DISSIPATED.

.WINDS E TO NE 20 TO 30 KT WITHIN A POLYGON BOUND BY 24N158W
17N150W 11N160W 11N170E 15N160E 20N160E 22N177W 24N158W.
.24 HOUR FORECAST WINDS E TO NE 20 TO 30 KT WITHIN A POLYGON
BOUND BY 27N176E 24N164W 13N150W 11N167W 09N177E 11N160E 21N160E
27N176E.
.48 HOUR FORECAST WINDS E TO NE 20 TO 30 KT WITHIN A POLYGON
BOUND BY 30N179E 30N170W 16N163W 10N170E 08N160E 22N160E 28N172E
30N179E.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 11 FT FROM 22N TO 10N BETWEEN 160E AND 160W...AND
ALSO FROM 17N TO 09N E OF 147W.
.24 HOUR FORECAST SEAS 8 TO 11 FT WITHIN A POLYGON BOUND BY
30N170E 30N166W 25N168W 16N160W 10N160W 08N172E 10N160E 25N160E
30N170E... AND ALSO FROM 12N TO 08N E OF 145W.
.48 HOUR FORECAST SEAS 8 TO 13 FT WITHIN A POLYGON BOUND BY
30N170E 30N155W 14N165W 10N179W 08N160E 25N160E 30N170E.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 07N140W TO 06N150W TO 09N165W TO 09N175W TO 06N176E.
ISOLATED MODERATE TSTMS WITHIN 360 NM N OF CONVERGENCE
LINE...AND ALSO WITHIN 180 NM S OF CONVERGENCE LINE W OF 175W.

.OTHERWISE ISOLATED MODERATE TSTMS S OF 10N W OF 176E.

$$

.FORECASTER BEDAL. HONOLULU HI.



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