High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 250404
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC APR 25.
24 HOUR FORECAST VALID 0000 UTC APR 26.
48 HOUR FORECAST VALID 0000 UTC APR 27.

.WARNINGS.

...GALE WARNING...
.LOW 34N137W 1018 MB MOVING SE 10 KT. WITHIN 300 NM NW QUADRANT
WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. ELSEWHERE WITHIN 240 NM E
SEMICIRCLE...AND 420 NM NW AND 600 NM SW QUADRANTS WINDS TO 25
KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 33N135W 1018 MB. FROM 30N TO 40N BETWEEN
135W AND 145W WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

...GALE WARNING...
.COMPLEX LOW WITH FIRST CENTER 63N169W 972 MB DRIFTING NW AND
SECOND CENTER 57N172W 979 MB MOVING NE 10 KT. WITHIN 120 NM NW
AND 1080 NM SE QUADRANTS OF FIRST CENTER...AND 720 NM SE AND
1080 NM SW QUADRANTS OF SECOND CENTER WINDS 25 TO 40 KT. SEAS 12
TO 23 FT...EXCEPT 8 TO 16 FT N OF THE ALEUTIAN ISLANDS.
ELSEWHERE WITHIN 1380 NM SE AND 1620 NM SW QUADRANTS OF FIRST
CENTER WINDS TO 25 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST LOW NW OF AREA NEAR 64N174W 984 MB. OVER
FORECAST WATERS WITHIN 1260 NM S SEMICIRCLE WINDS 20 TO 30 KT.
SEAS 10 TO 18 FT.
.48 HOUR FORECAST LOW AND CONDITIONS N OF AREA.

...GALE WARNING...
.LOW W OF AREA NEAR 41N155E 1014 MB MOVING NE 25 KT. OVER
FORECAST WATERS WITHIN 420 NM E SEMICIRCLE WINDS TO 25 KT. SEAS
TO 8 FT.
.12 HOUR FORECAST LOW 42N164E 1024 MB. WITHIN 300 NM S
SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW 43N170E 1026 MB. WITHIN 120 NM N AND 360
NM S SEMICIRCLES 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 44N150E 991 MB. FROM 33N TO
48N W OF 163E WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW NW OF AREA NEAR 52N160E 982 MB. OVER
FORECAST WATERS WITHIN 420 NM NE AND 1080 NM SE QUADRANTS WINDS
25 TO 40 KT. SEAS 9 TO 17 FT. ELSEWHERE WITHIN 540 NM NE AND
1320 NM SE QUADRANTS WINDS TO 25 KT. SEAS TO 11 FT.

.SYNOPSIS AND FORECAST.

.LOW 43N126W 1014 MB MOVING SW 10 KT. WITHIN 600 NM NW QUADRANT
WINDS 20 TO 30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 42N129W 1012 MB. WITHIN 660 NM NW QUADRANT
WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW 43N135W 1014 MB. WITHIN 540 NM W
SEMICIRCLE WINDS TO 25 KT. SEAS TO 10 FT.

.EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM 30N TO 40N
BETWEEN 159W AND 166E WINDS TO 25 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM
30N TO 42N BETWEEN 150W AND 176E WINDS TO 25 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM
30N TO 40N BETWEEN 150W AND 175W WINDS TO 25 KT. SEAS TO 11 FT.

.48 HOUR FORECAST NEW LOW 45N147W 1016 MB. WITHIN 240 NM
NW...480 NM NE...120 NM SE AND 420 NM SW QUADRANTS WINDS 20 TO
30 KT. SEAS TO 10 FT.

.48 HOUR FORECAST LOW 61N174W 996 MB. WITHIN 240 NM NE...660 NM
SE AND 540 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 12 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 44N W OF 170E AND FROM
44N TO 50N W OF 178E AND FROM 50N TO 53N W OF 169E.

.HIGH 51N138W 1035 MB DRIFTING SW.
.24 HOUR FORECAST HIGH 49N141W 1030 MB.
.48 HOUR FORECAST HIGH 51N141W 1024 MB.

.HIGH 40N149W 1035 MB NEARLY STATIONARY.
.24 HOUR FORECAST HIGH 38N151W 1032 MB.
.48 HOUR FORECAST HIGH 34N148W 1028 MB.

.HIGH 36N173E 1034 MB MOVING NE 15 KT.
.24 HOUR FORECAST HIGH 37N180W 1038 MB.
.48 HOUR FORECAST HIGH 40N176W 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 0000 UTC WED APR 25.
24 HOUR FORECAST VALID 0000 UTC THU APR 26.
48 HOUR FORECAST VALID 0000 UTC FRI APR 27.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N135W TO 27N140W. NW OF LINE FROM 30N128W TO
23N140W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
.24 HOUR FORECAST FRONT DISSIPATED. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.W OF LINE FROM 18N140W TO 08N134W WINDS 20 KT OR LESS. SEAS 8
TO 9 FT IN NW SWELL.
.24 HOUR FORECAST FROM 08N TO 15N W OF 130W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST FROM 10N TO 13N W OF 127W WINDS 20 KT OR LESS.
SEAS 8 FT IN NW SWELL.

.S OF 03S W OF 95W 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 0300 UTC WED APR 25...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 08N78W TO 06N98W. ITCZ FROM 06N98W TO 08N120W TO
07N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 60 NM S OF
AXIS BETWEEN 90W AND 97W. SCATTERED MODERATE WITHIN 150 NM N OF
AXIS BETWEEN 106W AND 111W.

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.


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