High Seas Forecast
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000
FZPN02 KWBC 231725
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1745 UTC MON APR 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC APR 23.
24 HOUR FORECAST VALID 1200 UTC APR 24.
48 HOUR FORECAST VALID 1200 UTC APR 25.

.WARNINGS.

...GALE WARNING...
.LOW 52N177E 974 MB MOVING NE 15 KT. WITHIN 240 NM E AND SE OF A
TROUGH FROM THE LOW TO 48N167E WINDS 35 TO 45 KT. SEAS 16 TO 30
FT. ELSEWHERE WITHIN 420 NM E AND SE...900 NM SW AND 300 NM NW
QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 18 FT.
.24 HOUR FORECAST LOW 56N174W 969 MB. BETWEEN 240 NM AND 540 NM
S AND SW QUADRANTS WINDS 35 TO 45 KT. SEAS 12 TO 23 FT.
ELSEWHERE WITHIN 600 NM SE...960 NM S AND SW...AND 480 NM W
QUADRANTS WINDS 25 TO 35 KT. SEAS 10 TO 20 FT.
.48 HOUR FORECAST LOW 59N167W 984 MB. WITHIN 600 NM SE AND 960
NM S AND SW QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 21
FT...HIGHEST NEAR 52N164W.

...GALE WARNING...
.LOW 58N175W 979 MB MOVING SW 15 KT. OVER ICE FREE FORECAST
WATERS W OF A LINE FROM 65N164W TO THE LOW WINDS 25 TO 40 KT.
SEAS 8 TO 17 FT.
.24 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED ABOVE
WITH LOW 56N174W.

...GALE WARNING...
.LOW 56N172W 981 MB MOVING NW 10 KT. FRONT EXTENDS FROM 54N166W
TO 38N175E. WITHIN 420 NM SE OF THE FRONT WINDS 25 TO 40 KT.
SEAS 8 TO 14 FT. ELSEWHERE WITHIN 360 NM SE AND 300 NM NE
QUADRANTS WINDS 20 TO 30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH NEW LOW TO FORM NEAR
59N165W 976 MB. FRONT TO EXTEND FROM LOW CENTER TO 56N160W TO
48N160W TO 40N167W. OVER FORECAST WATERS WITHIN 420 NM E OF THE
FRONT WINDS 25 TO 40 KT. SEAS 10 TO 20 FT...EXCEPT SEAS TO 8 FT
IN THE BERING SEA.
.48 HOUR FORECAST LOW 63N173W 975 MB. WITHIN 240 NM OF LOW
CENTER WINDS 20 TO 30 KT. SEAS TO 12 FT...HIGHEST SW.

...GALE WARNING...
.LOW 60N147W 1000 MB DRIFTING NW. FRONT EXTENDS FROM THE LOW TO
57N139W TO 50N136W TO 40N139W. OVER FORECAST WATERS N OF 50N
WITHIN 180 NM N AND E OF THE FRONT WINDS 25 TO 40 KT. SEAS 10 TO
21 FT...HIGHEST NEAR 59N139W. ELSEWHERE S OF 50N WITHIN 180 NM E
OF THE FRONT WINDS 20 TO 30 KT. SEAS 8 TO 15 FT.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

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

.SYNOPSIS AND FORECAST.

.LOW 56N152W 997 MB MOVING N 10 KT. WITHIN 600 NM S AND SE
QUADRANTS WINDS 20 TO 30 KT. SEAS 10 TO 16 FT. ELSEWHERE WITHIN
1500 NM S QUADRANT WINDS LESS THAN 25 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.OVER FORECAST WATERS FROM 35N TO 44N BETWEEN 123W AND 128W AREA
OF N TO NW WINDS TO 25 KT. SEAS TO 12 FT.
.12 HOUR FORECAST CONDITIONS DIMINISHED.

.24 HOUR FORECAST NEW LOW 40N136W 1018 MB. WITHIN 240 NM W
SEMICIRCLE WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW 35N138W 1020 MB. WITHIN 300 NM W AND NW
QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

.48 HOUR FORECAST NEW LOW 43N162E 1018 MB. WITHIN 360 NM S AND
SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 11 FT.

.48 HOUR FORECAST NEW LOW 43N126W 1015 MB. WITHIN 660 NM NW AND
540 NM W QUADRANTS WINDS TO 25 KT. SEAS TO 11 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM SE OF
A LINE FROM 47N174W TO 41N179E.
.24 HOUR FORECAST DENSE FOG FROM 46N TO 53N BETWEEN 155W AND
159W.
.48 HOUR FORECAST CONDITIONS IMPROVED.

.HIGH 49N128W 1028 MB MOVING N 05 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 32N136W 1023 MB MOVING SW 10 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 36N161W 1030 MB MOVING NE 25 KT.
.24 HOUR FORECAST HIGH 40N150W 1034 MB.
.48 HOUR FORECAST LITTLE CHANGE.

.24 HOUR FORECAST HIGH 37N164E 1032 MB.
.48 HOUR FORECAST HIGH 36N176E 1035 MB.

.48 HOUR FORECAST NEW HIGH 46N142W 1033 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 1200 UTC MON APR 23.
24 HOUR FORECAST VALID 1200 UTC TUE APR 24.
48 HOUR FORECAST VALID 1200 UTC WED APR 25.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN AREA BOUNDED BY 20N140W TO 13N130W TO 07N140W TO 20N140W
WINDS 20 KT OR LESS. SEAS TO 8 FT IN NW SWELL.
.24 HOUR FORECAST FROM 10N TO 13N BETWEEN 126W AND 140W WINDS 20
KT OR LESS. SEAS TO 8 FT IN NW SWELL.
.48 HOUR FORECAST FROM 09N TO 17N BETWEEN 124W AND 140W WINDS 20
KT OR LESS. SEAS TO 8 FT IN NW SWELL.

.N OF 29N BETWEEN 122W AND 130W WINDS 20 KT OR LESS. SEAS TO 8
FT  IN MIXED N AND NW SWELL.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.N OF 15N BETWEEN 94W AND 96W...INCLUDING THE GULF OF
TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST N OF 14.5N BETWEEN 94.5W AND 96W...INCLUDING
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.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.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.12 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.
.36 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.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.S OF 02S BETWEEN 100W AND 120W WINDS 20 KT OR LESS. SEAS TO 8
FT IN S SWELL.
.24 HOUR FORECAST S OF LINE FROM 03.4S83W TO 00N120W WINDS 20 KT
OR LESS. SEAS TO 8 FT IN SW SWELL.
.48 HOUR FORECAST S OF LINE FROM 03.4S96W TO 02S120W WINDS 20 KT
OR LESS. SEAS TO 8 FT IN S SWELL.

.18 HOUR FORECAST COLD FRONT APPROACH 30N140W. N OF 29N W OF
139W
WINDS 20 KT OR LESS. SEAS 8 FT IN NW SWELL.
.24 HOUR FORECAST WEAKENING COLD FRONT FROM 30N138W TO 27N140W.
W OF LINE FROM 30N135W TO 28N140W WINDS 20 KT OR LESS. SEAS TO 9
FT IN NW SWELL.
.48 HOUR FORECAST FRONT DISSIPATED. N OF 28N W OF 135W WINDS 20
KT OR LESS. SEAS TO 8 FT.

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

CONVECTION VALID AT 1500 UTC MON APR 23...

.SCATTERED MODERATE WITHIN 90 NM OF 23N127W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 08N78W 06N95W. ITCZ FROM 06N95W TO 08N120W TO
06N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 75 NM OF
06N82W AND 12.5N91W AND 08N99W AND WITHIN AREA BOUNDED BY
15N112W TO 05.5N103W TO 06N140W TO 15N112W.

.FORECASTER NELSON. NATIONAL HURRICANE CENTER.

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

SYNOPSIS VALID 1200 UTC APR 23 2018.
24 HOUR FORECAST VALID 1200 UTC APR 24 2018.
48 HOUR FORECAST VALID 1200 UTC APR 25 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 30N169E TO 26N165E MOVING E SLOWLY.
.24 HOUR FORECAST TROUGH DISSIPATED. NEW FRONT FROM 30N177E TO
27N170E TO 27N160E. NE TO E WINDS 20 TO 25 KT N OF 28N W OF
173E.
.48 HOUR FORECAST FRONT DISSIPATED OVER FORECAST WATERS. NE TO E
WINDS 20 TO 25 KT N OF 27N BETWEEN 162E AND 178E.

.FRONT FROM 30N152W TO 27N165W TO 29N172W MOVING SSE 10 KT.
.24 HOUR FORECAST WEAK FRONT FROM 29N140W TO 26N146W.
.48 HOUR FORECAST FRONT DISSIPATED OVER FORECAST WATERS.

.TROUGH FROM 11N172E TO 06N167E MOVING W 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 06N160E TO 01N161E MOVING W SLOWLY. ISOLATED TO
LOCALLY SCATTERED MODERATE TO STRONG TSTMS S OF 11N W OF 165E.
.24 HOUR FORECAST TROUGH MOVED W OF FORECAST AREA.

.RIDGE FROM 30N179W TO 25N170E MOVING ESE 10 KT AND GRADUALLY
ERODING FROM THE W.

.NE TO E WINDS 20 TO 25 KT FROM 12N TO 19N BETWEEN 153W AND
170E...FROM 10N TO 12N BETWEEN 151W AND 162W...AND FROM 19N TO
25N BETWEEN 162W AND 177W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 12N TO 23N
BETWEEN 149W AND 180W. E WINDS 20 TO 25 KT FROM 12N TO 19N
BETWEEN 165E AND 180E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 12N TO 25N W OF
147W.

.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 8 TO 10 FT BOUNDED BY 30N147W TO 21N163W TO 13N144W TO
08N147W TO 09N174W TO 13N169E TO 19N170E TO 24N179W TO 30N164W
TO 30N147W.
.24 HOUR FORECAST SEAS MAINLY 8 TO 11 FT E OF LINE FROM 30N152W
TO 19N165E TO 12N168E TO 10N177E.
.48 HOUR FORECAST SEAS MAINLY 8 TO 11 FT FROM 10N TO 22N.

.SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.

.ITCZ FROM 06N140W TO 08N160W TO 07N179E. ISOLATED MODERATE
TSTMS WITHIN 360 NM N OF ITCZ.

$$

.FORECASTER KINEL. HONOLULU HI.



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