High Seas Forecast
Issued by NWS

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343
FZPN01 KWBC 241536
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC TUE APR 24 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 24.
24 HOUR FORECAST VALID 1200 UTC APR 25.
48 HOUR FORECAST VALID 1200 UTC APR 26.

.WARNINGS.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 55N174W 971 MB MOVING NE 15 KT.
WITHIN 660 NM SE...960 NM S AND SW...AND BETWEEN 180 NM AND 480
NM W QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 22 FT...EXCEPT 9 TO
16 FT IN THE BERING SEA. ELSEWHERE WITHIN 1200 NM SW QUADRANT
WINDS TO 25 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST COMBINED LOW 60N167W 986 MB. WITHIN 600 NM SE
AND 960 NM SE QUADRANTS WINDS 25 TO 35 KT. SEAS 10 TO 21 FT.
ELSEWHERE WITHIN 1320 NM S AND SW QUADRANTS WINDS TO 25 KT. SEAS
8 TO 15 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

...GALE WARNING...
.LOW 59N164W 976 MB MOVING NW 15 KT. FRONT EXTENDS FROM THE LOW
TO 54N159W TO 45N163W TO 39N169W. WITHIN 420 NM E OF THE FRONT
WINDS 25 TO 40 KT. SEAS 11 TO 21 FT. ELSEWHERE WITHIN 540 NM E
OF THE FRONT WINDS TO 25 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 64N171W 975 MB. OVER ICE FREE WATERS
WITHIN 240 NM SE SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW W OF AREA 64N172W 992 MB. WITHIN 180 NM SE
SEMICIRCLE WINDS TO 25 KT. SEAS TO 8 FT.

...GALE WARNING...
.LOW 39N137W 1018 MB MOVING S 15 KT. WITHIN 240 NM W AND NW
QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 34N137W 1019 MB. WITHIN 420 NM W AND NW
QUADRANTS WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

...GALE WARNING...
.48 HOUR FORECAST OVER FORECAST WATERS FROM 36N TO 52N W OF 167E
AREA OF S TO SE WINDS 25 TO 35 KT. SEAS 8 TO 15 FT.

.SYNOPSIS AND FORECAST.

.LOW 43N125W 1014 MB MOVING W 05 KT. WITHIN 240 NM NW QUADRANT
WINDS LESS THAN 25 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 43N127W 1014 MB. WITHIN 600 NM NW QUADRANT
WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW 43N132W 1012 MB. WITHIN 420 NM W AND NW
QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.

.24 HOUR FORECAST LOW 43N162E 1018 MB. WITHIN 240 NM S
SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.48 HOUR FORECAST OVER FORECAST WATERS N OF 52N W OF 175W AREA
OF W TO SW WINDS TO 25 KT. SEAS TO 10 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM E OF
A LINE FROM 54N159W TO 46N162W.
.24 HOUR FORECAST CONDITIONS IMPROVED.

.DENSE FOG. 48 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM W
OF A LINE FROM 50N162E TO 44N170E TO 33N162E.

.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 40N150W 1034 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST HIGH 37N150W 1028 MB.

.HIGH 36N166E 1032 MB MOVING E 20 KT.
.24 HOUR FORECAST HIGH 36N175E 1035 MB.
.48 HOUR FORECAST HIGH 39N179W 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 1200 UTC TUE APR 24.
24 HOUR FORECAST VALID 1200 UTC WED APR 25.
48 HOUR FORECAST VALID 1200 UTC THU APR 26.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N129W TO 28N140W. W OF LINE FROM 30N133W TO
25N140W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NW SWELL.
.24 HOUR FORECAST DISSIPATING COLD FRONT FROM 30N132W TO 26N140W.
W OF LINE FROM 30N133W TO 26N140W WINDS 20 KT OR LESS. SEAS TO 8
FT IN NW SWELL.
.36 HOUR FORECAST FRONT DISSIPATED. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.WITHIN AREA BOUNDED BY A LINE FROM 18N140W TO 12N125W TO
07N130W TO 10N140W TO 18N140W WINDS 20 KT OR LESS. SEAS TO 9 FT
IN NW SWELL.
.24 HOUR FORECAST FROM 08N TO 18N W OF 125W WINDS 20 KT OR LESS.
SEAS TO 8 FT.
.48 HOUR FORECAST FROM 10N TO 17N W OF 122W WINDS 20 KT OR LESS.
SEAS TO 8 FT.

.S OF LINE FROM 03.4S82W TO 01S120W WINDS 20 KT OR LESS. SEAS TO
9 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.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.N OF 14.5N BETWEEN 94.5W 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.

.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 LITTLE CHANGE.
.30 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 1500 UTC TUE APR 24...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 09N84W TO 07N98W. ITCZ FROM 07N98W TO 08N114W TO
06N130W TO 07N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN
180 NM OF LINE FROM 06N77W TO 08N86W TO 05N103W AND WITHIN 240
NM OF LINE FROM 04N104W TO 11N118W.

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.



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