High Seas Forecast
Issued by NWS

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FZPN01 KWBC 250947
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC WED APR 25 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC APR 25.
24 HOUR FORECAST VALID 0600 UTC APR 26.
48 HOUR FORECAST VALID 0600 UTC APR 27.

.WARNINGS.

...GALE WARNING...
.LOW 63N170W 972 MB DRIFTING NW. BETWEEN 480 NM AND 1260 NM SW
QUADRANT...AND WITHIN 900 NM SE QUADRANT WINDS 25 TO 40 KT. SEAS
12 TO 23 FT...EXCEPT 8 TO 16 FT N OF THE ALEUTIAN ISLANDS.
ELSEWHERE WITHIN 1380 NM S SEMICIRCLE WINDS TO 25 KT. SEAS 8 TO
16 FT.
.24 HOUR FORECAST LOW NW OF AREA NEAR 64N172W 984 MB. OVER
FORECAST WATERS WITHIN 240 NM S SEMICIRCLE WINDS 25 TO 40 KT.
SEAS 8 TO 16 FT. ELSEWHERE WITHIN 1140 NM S SEMICIRCLE WINDS TO
25 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW AND CONDITIONS N OF AREA.

...GALE WARNING...
.LOW 42N160E 1018 MB MOVING NE 25 KT. WITHIN 300 NM SE QUADRANT
WINDS 25 TO 35 KT. SEAS TO 11 FT. ELSEWHERE WITHIN 300 NM NE AND
420 NM SE QUADRANT WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW 43N172E 1024 MB. WITHIN 360 NM S
SEMICIRCLE WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

...GALE WARNING...
.24 HOUR FORECAST LOW W OF AREA NEAR 46N151E 986 MB. FROM 40N TO
48N W OF 164E WINDS 25 TO 40 KT. SEAS TO 12 FT. ELSEWHERE FROM
33N TO 50N W OF 167E WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW NW OF AREA NEAR 54N164E 978 MB. OVER
FORECAST WATERS WITHIN 420 NM NE...1080 NM SE AND 660 NM SW
QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 19 FT. ELSEWHERE WITHIN
540 NM NE AND 1320 NM SE QUADRANTS WINDS TO 25 KT. SEAS TO 11 FT.

.SYNOPSIS AND FORECAST.

.LOW 36N137W 1018 MB MOVING SE 10 KT. WITHIN 240 NM E AND 420 NM
W SEMICIRCLES WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.LOW 42N127W 1014 MB MOVING SW 10 KT. WITHIN 300 NM SW AND 780
NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 42N132W 1012 MB. WITHIN 660 NM W
SEMICIRCLE WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW 44N134W 1014 MB. WITHIN 540 NM SW QUADRANT
WINDS TO 25 KT. SEAS TO 10 FT.

.EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM 30N TO 40N
BETWEEN 155W AND 170E WINDS TO 25 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM
30N TO 60N BETWEEN 130W AND 177E WINDS TO 25 KT. SEAS 8 TO 13
FT. .48 HOUR FORECAST CONDITIONS DESCRIBED BELOW.

.48 HOUR FORECAST NEW LOW 48N145W 1018 MB. WITHIN 240 NM
NW...360 NM NE...120 NM SE AND 480 NM SW QUADRANTS WINDS 20 TO
30 KT. SEAS TO 10 FT.

.48 HOUR FORECAST LOW 61N170W 998 MB. WITHIN 600 NM S SEMICIRCLE
WINDS 20 TO 30 KT. SEAS TO 12 FT.

.48 HOUR FORECAST NEW LOW 34N157W 1018 MB. FROM 30N TO 41N
BETWEEN 149W AND 180W WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.

.DENSE FOG. 24 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
FROM 38N TO 45N W OF 164E.
.48 HOUR FORECAST DENSE FOG FROM 32N TO 43N W OF 171E AND FROM
43N TO 50N BETWEEN 180W AND 165E AND FROM 50N TO 53N BETWEEN
174W AND 166E.

.HIGH 49N138W 1035 MB DRIFTING SW.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 39N151W 1035 MB DRIFTING SW.
.24 HOUR FORECAST HIGH 36N152W 1032 MB.
.48 HOUR FORECAST HIGH 36N144W 1025 MB.

.HIGH 36N174E 1035 MB MOVING NE 15 KT.
.24 HOUR FORECAST HIGH 37N179W 1038 MB.
.48 HOUR FORECAST HIGH 40N174W 1040 MB.

.FORECASTER HOLLEY. 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 0600 UTC WED APR 25.
24 HOUR FORECAST VALID 0600 UTC THU APR 26.
48 HOUR FORECAST VALID 0600 UTC FRI APR 27.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N134W TO 26N140W. NW OF LINE FROM 30N128W TO
23N140W WINDS 20 KT OR LESS. SEAS 8 FT IN NW SWELL.
.24 HOUR FORECAST FRONT DISSIPATED. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.W OF LINE FROM 17N140W TO 12N130W TO 08N134W WINDS 20 KT OR
LESS. SEAS 8 TO 9 FT IN NW SWELL.
.24 HOUR FORECAST FROM 09N TO 16N W OF 130W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST FROM 10N TO 14N W OF 136W WINDS 20 KT OR LESS.
SEAS 8 FT IN NW SWELL.

.S OF 03S W OF 96W WINDS 20 KT OR LESS. SEAS 8 FT IN S SWELL.
.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 0900 UTC WED APR 25...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 07N77W TO 06N98W. ITCZ FROM 06N98W TO 07N117W TO
06N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 75 NM S OF
AXIS BETWEEN 93W AND 99W.

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.


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