High Seas Forecast
Issued by NWS

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170
FZPN01 KWBC 240334
HSFEP1

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

...GALE WARNING...
.LOW 54N178W 970 MB MOVING NE 10 KT. WITHIN 1140 NM S
SEMICIRCLE...AND 300 NM NW AND 600 NM NE QUADRANTS WINDS 25 TO
40 KT. SEAS 12 TO 24 FT. ELSEWHERE WITHIN 1320 NM S
SEMICIRCLE...AND 660 NM NE QUADRANT WINDS TO 25 KT. SEAS 8 TO 16
FT.
.24 HOUR FORECAST LOW 57N172W 975 MB. WITHIN 1140 NM S
SEMICIRCLE WINDS 25 TO 40 KT. SEAS 12 TO 25 FT. ELSEWHERE WITHIN
300 NM N AND 1260 NM S SEMICIRCLES WINDS TO 25 KT. SEAS 8 TO 15
FT.
.48 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 63N174W
DESCRIBED BELOW.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 63N169W 972 MB. WITHIN 120 NM NW AND
SE QUADRANTS WINDS 25 TO 35 KT. SEAS TO 8 FT. ELSEWHERE WITHIN
180 NM SW QUADRANT WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LOW W OF AREA NEAR 63N174W 980 MB. OVER
FORECAST WATERS WITHIN 1140 NM S SEMICIRCLE...AND 240 NM NE
QUADRANT WINDS 20 TO 30 KT. SEAS 8 TO 18 FT.

...GALE WARNING...
.24 HOUR FORECAST FROM 36N TO 43N W OF 163E WINDS 20 TO 30 KT.
SEAS TO 8 FT.
.36 HOUR FORECAST FROM 36N TO 43N W OF 168E WINDS 25 TO 35 KT.
SEAS 8 TO 14 FT.
.48 HOUR FORECAST FROM 37N TO 45N BETWEEN 175E AND 165E WINDS 20
TO 30 KT. SEAS 8 TO 14 FT.

.SYNOPSIS AND FORECAST.

.FROM 35N TO 47N BETWEEN 123W AND 130W WINDS TO 25 KT. SEAS TO 8
FT.
.24 HOUR FORECAST FROM 39N TO 53N BETWEEN 124W AND 133W WINDS 20
TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST FROM 37N TO 54N BETWEEN 127W AND 141W WINDS TO
25 KT. SEAS TO 11 FT.

.LOW 40N136W 1016 MB DRIFTING SW. WITHIN 600 NM W SEMICIRCLE
WINDS TO 25 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW DISSIPATED. FROM 30N TO 47N BETWEEN 133W
AND 145W WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DESCRIBED ABOVE.

.EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM 60N BETWEEN 127W
AND 156W WINDS TO 25 KT. SEAS 8 TO 17 FT.
.24 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM
30N TO 42N BETWEEN 160W AND 165E WINDS TO 25 KT. SEAS 8 TO 15 FT.
.48 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM
30N TO 43N BETWEEN 150W AND 174E WINDS TO 25 KT. SEAS 8 TO 13 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 240 NM SE OF
A LINE FROM 41N174W TO 52N164W.
.24 HOUR FORECAST CONDITIONS IMPROVED.

.HIGH 50N129W 1027 MB NEARLY STATIONARY.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 38N154W 1034 MB MOVING NE 10 KT.
.24 HOUR FORECAST HIGH 40N149W 1036 MB.
.48 HOUR FORECAST LITTLE CHANGE.

.24 HOUR FORECAST HIGH 36N172E 1024 MB.
.48 HOUR FORECAST HIGH 37N179E 1038 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 TUE APR 24.
24 HOUR FORECAST VALID 0000 UTC WED APR 25.
48 HOUR FORECAST VALID 0000 UTC THU APR 26.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.E OF LINE FROM 18N140W TO 10N126W TO 08N140W WINDS 20 KT OR
LESS. SEAS 8 FT IN NW SWELL.
.24 HOUR FORECAST FROM 08N TO 16N W OF 135W WINDS 20 KT OR LESS.
SEAS 8 FT IN NW SWELL.
.48 HOUR FORECAST FROM 08N TO 15N W OF 130W WINDS 20 KT OR LESS.
SEAS 8 FT IN NW SWELL.

.S OF 02S W OF 91W WINDS 20 KT OR LESS. SEAS 8 FT IN S SWELL.
.24 HOUR FORECAST S OF 02S W OF 94W WINDS 20 KT OR LESS. SEAS 8
FT IN S SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.06 HOUR FORECAST N OF 14.5N BETWEEN 94.5W AND 96W...INCLUDING
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.COLD FRONT APPROACH 30N140W. NW OF LINE FROM 30N139W TO 29N140W
WINDS 20 KT OR LESS. SEAS 8 FT IN NW SWELL.
.24 HOUR FORECAST WEAKENING COLD FRONT FROM 30N136W TO 26N140W.
NW OF LINE FROM 30N128W TO 22N140W WINDS 20 KT OR LESS. SEAS 8
TO 9 FT IN NW SWELL.
.48 HOUR FORECAST FRONT DISSIPATED. 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 TUE APR 24...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 08N78W TO 07N99W. ITCZ FROM 07N99W TO 07N120W TO
06N140W. SCATTERED MODERATE ISOLATED STRONG FROM 05N TO 10N
BETWEEN 107W AND 134W.

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.



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