High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 211545
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC SAT APR 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 21.
24 HOUR FORECAST VALID 1200 UTC APR 22.
48 HOUR FORECAST VALID 1200 UTC APR 23.

.WARNINGS.

...STORM WARNING...
.LOW 49N164W 983 MB MOVING NE 20 KT. FROM 42N TO 47N BETWEEN
160W AND 173W WINDS 35 TO 50 KT. SEAS 18 TO 32 FT. ALSO WITHIN
300 NM N SEMICIRCLE...720 NM SW AND 840 NM SE QUADRANTS WINDS 25
TO 40 KT. SEAS 10 TO 20 FT...HIGHEST SW. ELSEWHERE WITHIN 1200
NM SW QUADRANT WINDS TO 25 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST LOW 53N155W 985 MB. FRONT TO EXTEND FROM
57N156W TO 56N144W TO 48N142W TO 38N150W. WITHIN 240 NM N AND E
OF THE FRONT...AND WITHIN 420 NM S SEMICIRCLE WINDS 25 TO 40 KT.
SEAS 8 TO 15 FT...EXCEPT S SEMICIRCLE SEAS 11 TO 22 FT.
ELSEWHERE WITHIN 480 NM E AND SE AND 1020 NM SW QUADRANTS WINDS
20 TO 30 KT. SEAS 9 TO 19 FT...HIGHEST SW.
.48 HOUR FORECAST LOW 57N153W 997 MB. FRONT TO EXTEND FROM
60N148W TO 58N138W TO 53N136W TO 44N137W. OVER FORECAST WATERS
WITHIN 120 NM N AND E OF THE FRONT WINDS 25 TO 40 KT. SEAS 9 TO
20 FT...HIGHEST NEAR 58N139W. ELSEWHERE WITHIN 540 NM S AND SE
QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 16 FT.

...STORM WARNING...
.12 HOUR FORECAST LOW 50N160E 988 MB. WITHIN 600 NM SE AND 420
NM E QUADRANTS WINDS 25 TO 35 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW 51N167E 980 MB. WITHIN 240 NM SW
SEMICIRCLE WINDS 40 TO 50 KT. SEAS 12 TO 20 FT. ALSO WITHIN 360
NM NE...660 NM SE...480 NM SW AND 240 NM NW QUADRANTS WINDS 25
TO 40 KT. SEAS 8 TO 16 FT.
.48 HOUR FORECAST LOW 52N178E 974 MB. WITHIN 240 NM E AND SE OF
A LINE FROM THE LOW TO 48N168E WINDS 35 TO 45 KT. SEAS 15 TO 27
FT. ELSEWHERE WITHIN 1020 NM SE AND 780 NM SW QUADRANTS WINDS 25
TO 40 KT. SEAS 8 TO 17 FT.

...GALE WARNING...
.OVER FORECAST WATERS FROM 33N TO 41N E OF 127W AREA OF N TO NW
WINDS 20 TO 30 KT. SEAS TO 11 FT.
.12 HOUR FORECAST FROM 38N TO 43N E OF 127W N TO NW WINDS 25 TO
35 KT. SEAS 9 TO 13 FT.
.24 HOUR FORECAST FROM 32N TO 44N BETWEEN 121W AND 129W N WINDS
20 TO 30 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST FROM 35N TO 44N BETWEEN 122W AND 128W N WINDS
TO 25 KT. SEAS TO 11 FT.

...GALE WARNING...
.LOW 59N164W 995 MB MOVING SW 10 KT. OVER ICE FREE WATERS WITHIN
420 NM NW QUADRANT WINDS 20 TO 30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH NEW LOW TO FORM 57N163W
987 MB. WITHIN 540 NM NW AND 240 NM NE QUADRANTS WINDS 20 TO 30
KT. SEAS TO 12 FT...HIGHEST NW.
.36 HOUR FORECAST LOW 58N170W 986 MB. WITHIN 360 NM NW QUADRANT
WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW 58N175W 978 MB. W OF A LINE FROM THE LOW
TO 65N161W WINDS 25 TO 40 KT. SEAS 8 TO 17 FT. ELSEWHERE WITHIN
420 NM SE QUADRANT WINDS 20 TO 30 KT. SEAS TO 11 FT.

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

.SYNOPSIS AND FORECAST.

.LOW INLAND 58N130W 1006 MB MOVING NE 20 KT. OVER FORECAST
WATERS WITHIN 780 NM S QUADRANT WINDS TO 25 KT. SEAS 8 TO 16 FT.
.12 HOUR FORECAST LOW WELL INLAND AND CONDITIONS DIMINISHED.

.LOW W OF AREA 30N157E 1009 MB MOVING NE 10 KT. OVER FORECAST
WATERS S OF 34N W OF 163E WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW 31N161E 1012 MB. WITHIN 480 NM E QUADRANT
WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DESCRIBED IN
WARNINGS SECTION ABOVE.

.DENSE FOG. 24 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
WITHIN 180 NM E OF A LINE FROM 50N143W TO 40N147W.
.48 HOUR FORECAST CONDITIONS IMPROVED.

.DENSE FOG. 48 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
WITHIN 180 NM E OF A LINE FROM 47N173W TO 38N178E.

.HIGH 40N136W 1034 MB MOVING NE 20 KT.
.24 HOUR FORECAST HIGH 46N129W 1032 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 30N176W 1024 MB MOVING E 15 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 36N176E 1024 MB MOVING E 20 KT.
.24 HOUR FORECAST HIGH 35N175W 1027 MB.
.48 HOUR FORECAST HIGH 36N161W 1030 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 SAT APR 21.
24 HOUR FORECAST VALID 1200 UTC SUN APR 22.
48 HOUR FORECAST VALID 1200 UTC MON APR 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FROM 10N TO 14N W OF 130W NE TO E WINDS 20 TO 25 KT. SEAS 9 TO
11 FT. ELSEWHERE W OF LINE FROM 03N140W TO 02N135W TO 10N113W TO
13N114W TO 20N134W TO 29N140W WINDS 20 KT OR LESS. SEAS 8 TO 10
FT IN MIXED SWELL.
.24 HOUR FORECAST W OF LINE FROM 07N140W TO 10N120W TO 25N138W
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST FROM 07N TO 20N W OF 126W WINDS 20 KT OR LESS.
SEAS TO 9 FT IN MIXED SWELL.

.WITHIN 30 NM OF LINE FROM 11N86W TO 10N88W...INCLUDING GULF
OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS TO 8 FT IN MIXED NE AND
SW SWELL.
.24 HOUR FORECAST LITTLE CHANGE IN WINDS. SEAS LESS THAN 8 FT.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.42 HOUR FORECAST WITHIN 30 NM OF LINE FROM 11N86W TO 10N88W...
INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS
THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.FROM 23N TO 29N BETWEEN 114W AND 118W WINDS 20 KT OR LESS. SEAS
TO 8 FT IN NW SWELL.
.06 HOUR FORECAST N OF LINE FROM 30N120W TO 28N131W WINDS 20 KT
OR LESS. SEAS 8 FT IN NW SWELL.
.24 HOUR FORECAST N OF LINE FROM 30N120W TO 28N121W TO 25N138W
TO 30N133W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST N OF 28N BETWEEN 121W AND 132W WINDS 20 KT OR
LESS. SEAS 8 FT IN NW SWELL.

.GULF OF TEHUANTEPEC N OF 14.5N BETWEEN 94.5W AND 95.5W N WINDS
20 TO 25 KT. SEAS TO 8 FT. ELSEWHERE FROM 07.5N TO 14N BETWEEN
92.5W AND 101W WINDS 20 KT OR LESS. SEAS TO 9 FT IN MIXED N TO
NE AND SW SWELL.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.36 HOUR FORECAST S OF 02S BETWEEN 100W AND 120W WINDS 20 KT OR
LESS. SEAS 8 FT IN SW SWELL.
.48 HOUR FORECAST S OF 01.5S BETWEEN 92W AND 120W WINDS 20 KT OR
LESS. SEAS 8 FT IN SW SWELL.

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

CONVECTION VALID AT 1445 UTC SAT APR 21...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 09N74W TO 04N100W TO 07N113W. ITCZ CONTINUES FROM
07N113W TO 08N134W TO BEYOND 07N140W. SCATTERED MODERATE TO
STRONG WITHIN 150 NM N AND 120 NM S OF TROUGH BETWEEN 76W AND
100W. SCATTERED MODERATE ISOLATED STRONG FROM 04N TO 12N BETWEEN
108W AND 125W. WIDELY SCATTERED MODERATE TO STRONG WITHIN 120 NM
N OF ITCZ W OF 128W.

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.


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