High Seas Forecast
Issued by NWS

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885
FZPN01 KWBC 192132
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC THU APR 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC APR 19.
24 HOUR FORECAST VALID 1800 UTC APR 20.
48 HOUR FORECAST VALID 1800 UTC APR 21.

.WARNINGS.

...STORM WARNING...
.LOW 43N168E 983 MB MOVING NE 30 KT. OVER FORECAST WATERS WITHIN
180 NM W AND 300 NM S AND SE QUADRANTS WINDS 40 TO 50 KT. SEAS
13 TO 26 FT. ELSEWHERE FROM 33N TO 47N BETWEEN 160E AND 179E
WINDS 25 TO 40 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST LOW 47N176W 980 MB. WITHIN 240 NM SW AND 420
NM S QUADRANTS WINDS 40 TO 50 KT. SEAS 16 TO 31 FT. ELSEWHERE
FROM 35N TO 51N BETWEEN 160W AND 173E WINDS 25 TO 40 KT. SEAS 9
TO 23 FT.
.48 HOUR FORECAST LOW 50N162W 983 MB. BETWEEN 120 NM AND 540 NM
S QUADRANT WINDS 35 TO 45 KT. SEAS 16 TO 32 FT. ELSEWHERE WITHIN
300 NM N AND NW...720 NM S AND SW AND 780 NM E QUADRANTS WINDS
25 TO 35 KT. SEAS 9 TO 22 FT.

...GALE WARNING...
.LOW 58N143W 990 MB MOVING NW 10 KT. FRONT EXTENDS FROM 55N134W
TO 48N139W TO 41N148W. WITHIN 360 NM S QUADRANT WINDS 25 TO 35
KT. SEAS 9 TO 16 FT. ELSEWHERE WITHIN 240 NM SE OF FRONT AND
FROM 52N TO 60N BETWEEN 134W AND 149W WINDS 20 TO 30 KT. SEAS 8
TO 13 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH ASSOCIATED CONDITIONS
DIMINISHED.

...GALE WARNING...
.LOW 55N165W 987 MB MOVING NE 15 KT. WITHIN 300 NM SW AND 720 NM
S QUADRANTS WINDS 25 TO 35 KT. SEAS 11 TO 20 FT. ELSEWHERE
WITHIN AN AREA BOUNDED BY A LINE FROM 38N159W TO 53N148W TO
55N177W TO 45N175W TO 38N159W WINDS 20 TO 30 KT. SEAS 8 TO 14
FT.
.24 HOUR FORECAST LOW 56N154W 998 MB. FROM 42N TO 53N BETWEEN
142W AND 157W WINDS 20 TO 30 KT. SEAS 9 TO 17 FT.
.48 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED WITH LOW
50N162W ABOVE.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 51N133W 1005 MB. FRONT TO EXTEND FROM
54N133W TO LOW TO 46N133W TO 41N135W. WITHIN 180 NM E OF FRONT
WINDS 25 TO 40 KT. SEAS 9 TO 16 FT. ELSEWHERE WITHIN 240 NM E
AND 180 NM W OF FRONT WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST LOW DISSIPATED INLAND. FROM 44N TO 53N BETWEEN
125W AND 140W WINDS LESS THAN 25 KT. SEAS TO 11 FT.

...GALE WARNING...
.48 HOUR FORECAST OVER FORECAST WATERS W OF A LINE FROM 40N164E
TO 46N167E TO 50N164E WINDS 25 TO 35 KT. SEAS TO 12 FT.

.SYNOPSIS AND FORECAST.

.OVER FORECAST WATERS E OF A LINE FROM 42N126W TO 37N125W TO
30N120W AREA OF N TO NW WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST FROM 32N TO 40N BETWEEN 120W AND 125W AREA OF
NW WINDS 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST FROM 31N TO 43N BETWEEN 121W AND 129W AREA OF
N TO NW WINDS 20 TO 30 KT. SEAS TO 12 FT.

.24 HOUR FORECAST LOW 53N171E 997 MB. OVER FORECAST WATERS
WITHIN 180 NM W AND 300 NM S QUADRANTS WINDS TO 25 KT. SEAS TO
11 FT.
.48 HOUR FORECAST LOW 53N174E 1003 MB. WITHIN 360 NM S QUADRANT
WINDS TO 25 KT. SEAS TO 9 FT.

.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY OVER ICE FREE
FORECAST WATERS N OF 60N W OF ALASKA.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 40N TO 45N
BETWEEN 168E AND 174E.
.24 HOUR FORECAST DENSE FOG FROM 44N TO 48N BETWEEN 167W AND
174W.
.48 HOUR FORECAST DENSE FOG FROM 36N TO 43N BETWEEN 147W AND
153W AND FROM 42N TO 48N BETWEEN 160E AND 168E.

.HIGH 37N170W 1028 MB MOVING E 35 KT.
.24 HOUR FORECAST HIGH 37N150W 1031 MB.
.48 HOUR FORECAST HIGH 42N134W 1034 MB.

.HIGH 36N135W 1030 MB MOVING SE 10 KT WILL TURN SW AFTER 12
HOURS.
.24 HOUR FORECAST HIGH 33N136W 1030 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 46N127W 1027 MB NEARLY STATIONARY.
.24 HOUR FORECAST HIGH DISSIPATED.

.48 HOUR FORECAST HIGH 36N179E 1024 MB.

.FORECASTER KOSIER. 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 1800 UTC THU APR 19.
24 HOUR FORECAST VALID 1800 UTC FRI APR 20.
48 HOUR FORECAST VALID 1800 UTC SAT APR 21.

.WARNINGS.

...GALE WARNING...
.06 HOUR FORECAST GULF OF TEHUANTEPEC N OF 15N BETWEEN 94.5W AND
95.5W N WINDS 25 TO 35 KT. SEAS 8 TO 10 FT.
.12 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 16N95W TO 14N96W N
TO NE WINDS 30 TO 40 KT. SEAS 10 TO 14 FT. ELSEWHERE WITHIN 60
NM OF A LINE FROM 16N95W TO 13N95.5W NE TO E WINDS 20 TO 25 KT.
SEAS 8 TO 10 FT.
.24 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO 14.5N95.5W
TO 12N97W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO
30 KT. SEAS 10 TO 13 FT. ELSEWHERE WITHIN 75 NM OF LINE FROM
16N95W TO 11N97W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED
NE AND SW SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.SYNOPSIS AND FORECAST.

.FROM 08N TO 13N BETWEEN 127W AND 137W NE WINDS 20 TO 25 KT.
SEAS 8 TO 10 FT. ELSEWHERE FROM 07N TO 23N W OF 118W WINDS 20 KT
OR LESS. SEAS TO 8 FT IN NW SWELL.
.24 HOUR FORECAST TROUGH FROM 07N127W TO 15N125W. FROM 10N TO
16N BETWEEN 121W AND 130W NE WINDS 20 TO 25 KT. SEAS 8 TO 11 FT.
ELSEWHERE W OF A LINE FROM 25N140W TO 14N108W TO 04N127W WINDS
20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED NE AND NW SWELL.
.48 HOUR FORECAST TROUGH FROM 07N125W TO 15N122W. W OF A LINE
FROM 30N120W TO 22N130W TO 10N113W TO 03N140W WINDS 20 KT OR
LESS. SEAS 8 TO 10 FT IN MIXED NE AND NW SWELL.

.S OF A LINE FROM 03.4S92W TO 11N96W TO 11N117W TO 00N120W WINDS
20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SW AND NW SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.12 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 11N86W TO
10N89W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS
TO 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 11N86W TO
10N89W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS
TO 8 FT.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.06 HOUR FORECAST N OF 25N E OF 116W...INCLUDING SEBASTIAN
VIZCAINO BAY...NW WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST E OF LINE FROM 30N123W TO 21N115W WINDS 20 KT
OR LESS. SEAS TO 8 FT IN NW SWELL.
.48 HOUR FORECAST CONDITIONS MERGED WITH AREA OF SWELL TO THE W.

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

CONVECTION VALID AT 1430 UTC THU APR 19...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 08N77W TO 06N93W. ITCZ FROM 06N93W TO
07N115W TO 05N130W TO BEYOND 06N140W. SCATTERED MODERATE
ISOLATED STRONG WITHIN 120 NM EITHER SIDE OF ITCZ AXIS BETWEEN
91W AND 113W AND FROM 04N TO 13N BETWEEN 114W AND 132W.

$$
.FORECASTER LATTO. NATIONAL HURRICANE CENTER.



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