High Seas Forecast
Issued by NWS

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000
FZPN02 KWBC 211125
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1145 UTC SAT APR 21 2018

CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 21.
24 HOUR FORECAST VALID 0600 UTC APR 22.
48 HOUR FORECAST VALID 0600 UTC APR 23.

.WARNINGS.

...STORM WARNING...
.LOW 48N169W 984 MB MOVING NE 20 KT. WITHIN 360 NM S AND SW
QUADRANTS WINDS 40 TO 50 KT. SEAS 18 TO 32 FT. ELSEWHERE WITHIN
360 NM NW AND N...840 NM E...780 NM S...AND 660 NM SW QUADRANTS
WINDS 25 TO 40 KT. SEAS 12 TO 25 FT.
.24 HOUR FORECAST LOW 53N158W 985 MB. OVER ICE FREE FORECAST
WATERS WITHIN 660 NM NE...1020 NM SE AND S...780 NM SW...AND 480
NM NW QUADRANTS WINDS 25 TO 35 KT. SEAS 10 TO 26 FT...HIGHEST S
QUADRANT...EXCEPT SEAS TO 9 FT IN BERING SEA.
.48 HOUR FORECAST LOW 56N154W 992 MB. FRONT TO EXTEND FROM
60N148W TO 55N139W TO 50N138W TO 38N142W. OVER FORECAST WATERS N
OF 52N WITHIN 180 NM N AND NE OF THE FRONT WINDS 35 TO 45 KT.
SEAS 11 TO 18 FT. ELSEWHERE WITHIN 300 NM N AND 540 NM S AND SW
QUADRANTS...AND S OF 52N WITHIN 240 NM E AND SE OF THE FRONT
WINDS 25 TO 35 KT. SEAS 9 TO 17 FT.

...STORM WARNING...
.12 HOUR FORECAST LOW W OF AREA 49N156E 992 MB. OVER FORECAST
WATERS FROM 40N TO 51N W OF 165E WINDS 25 TO 35 KT. SEAS TO 10
FT.
.24 HOUR FORECAST LOW 50N162E 983 MB. FROM 39N TO 53N W OF 174E
WINDS 25 TO 40 KT. SEAS 9 TO 15 FT.
.30 HOUR FORECAST LOW 51N165E 981 MB. WITHIN 240 NM SW
SEMICIRCLE WINDS 40 TO 50 KT. SEAS 12 TO 20 FT.
.48 HOUR FORECAST LOW 52N173E 975 MB. WITHIN 360 NM S AND SW
QUADRANTS WINDS 35 TO 45 KT. SEAS 14 TO 28 FT. ELSEWHERE WITHIN
480 NM NW AND N...600 NM E AND SE...AND 780 NM SW QUADRANTS AND
WITHIN 480 NM SE OF A FRONT TO EXTEND FROM 53N172W TO 36N170E
WINDS 25 TO 35 KT. SEAS 10 TO 20 FT...EXCEPT 8 TO 13 FT SE OF
THE FRONT.

...GALE WARNING...
.LOW 54N132W 1003 MB MOVING NE 20 KT. OVER FORECAST WATERS
WITHIN 90 NM EITHER SIDE OF FRONT EXTENDING FROM THE LOW TO
50N128W TO 47N126W WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. ELSEWHERE
FROM 44N TO 53N E OF 145W WINDS TO 25 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW INLAND WITH CONDITIONS DIMINISHED.

...GALE WARNING...
.FROM 33N TO 40N E OF 125W AREA OF NW TO N WINDS 20 TO 30 KT.
SEAS TO 10 FT.
.18 HOUR FORECAST FROM 33N TO 44N BETWEEN 122W AND 128W AREA OF
NW TO N WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST FROM 30N TO 44N BETWEEN 122W AND 129W AREA OF
NW TO N WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST FROM 34N TO 45N BETWEEN 122W AND 128W AREA OF
NW TO N WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.

...GALE WARNING...
.LOW INLAND 61N160W 996 MB MOVING SW 15 KT. OVER ICE FREE
FORECAST WATERS N OF 59N AREA OF N TO NE WINDS 20 TO 30 KT. SEAS
TO 10 FT.
.24 HOUR FORECAST LOW DISSIPATED. N OF A LINE FROM 60N179E TO
57N172W TO 60N165W WINDS 20 TO 30 KT. SEAS TO 10 FT.
.48 HOUR FORECAST NEW LOW 58N172W 984 MB. WITHIN 300 NM SE
QUADRANT AND N OF 58N W OF 165W WINDS 25 TO 35 KT. SEAS 8 TO 14
FT.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY OVER ICE FREE FORECAST WATERS
N OF 61N W OF ALASKA.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 63N.

.SYNOPSIS AND FORECAST.

.LOW W OF AREA 31N156E 1008 MB MOVING NE 10 KT. OVER FORECAST
WATERS S OF 34N W OF 163E WINDS 20 TO 30 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 32N160E 1009 MB. S OF 34N W OF 164E WINDS
TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DESCRIBED IN
SECOND STORM WARNING ABOVE.

.DENSE FOG. VSBY OCCASIONALLY 1 NM OR LESS WITHIN 150 NM NE OF A
LINE FROM 46N158W TO 49N165W.
.24 HOUR FORECAST DENSE FOG WITHIN 180 NM E AND SE OF A LINE
FROM 51N146W TO 46N146W TO 40N151W.
.48 HOUR FORECAST DENSE FOG WITHIN 120 NM E OF A LINE FROM
52N139W TO 40N141W.

.DENSE FOG. 48 HOUR FORECAST VSBY OCCASIONALLY 1 NM OR LESS
WITHIN 120 NM OF 41N179E.

.HIGH 38N140W 1033 MB MOVING NE 20 KT.
.24 HOUR FORECAST HIGH 44N132W 1033 MB.
.48 HOUR FORECAST HIGH 48N128W 1029 MB.

.HIGH 36N173E 1023 MB MOVING SE 20 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 30N180W 1023 MB MOVING E 25 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.24 HOUR FORECAST NEW HIGH 37N179E 1026 MB.
.48 HOUR FORECAST HIGH 36N164W 1029 MB.

.FORECASTER HUFFMAN. 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 SAT APR 21.
24 HOUR FORECAST VALID 0600 UTC SUN APR 22.
48 HOUR FORECAST VALID 0600 UTC MON APR 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 30 NM OF LINE FROM 16N95W TO 14N95W...INCLUDING GULF OF
TEHUANTEPEC...N TO NE WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
ELSEWHERE WITHIN 45 NM OF LINE FROM 16N95W TO 14N95W TO 13N96W
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED N TO NE AND SW
SWELL. FROM 09N TO 11N BETWEEN 96W AND 101W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN MIXED NE AND SW SWELL.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.W OF LINE FROM 19N140W TO 13N128W TO 07N140W NE WINDS 20 TO 25
KT. SEAS 9 TO 10 FT. ELSEWHERE W OF LINE FROM 30N139W TO 19N132W
TO 13N112W TO 10N112W TO 08N122W TO 06N140W WINDS 20 KT OR LESS.
SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST W OF LINE FROM 16N140W TO 15N129W TO 12N127W
TO 10N140W NE WINDS 20 TO 25 KT. SEAS 9 TO 10 FT. ELSEWHERE W OF
LINE FROM 30N135W TO 19N129W TO 10N122W TO 07N140W WINDS 20 KT
OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.48 HOUR FORECAST W OF LINE FROM 21N140W TO 15N129W TO 10N128W
TO 08N140W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.

.WITHIN 30 NM OF LINE FROM 11N86W TO 10.5N88.5W...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.
.36 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 15 NM OF LINE FROM 11N86W TO
11N88W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS
LESS THAN 8 FT.

.12 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 29N120W TO 26N132W WINDS 20 KT
OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST N OF 28N BETWEEN 122W AND 132W WINDS 20 KT OR
LESS. SEAS 8 TO 9 FT IN NW SWELL.

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

CONVECTION VALID AT 0845 UTC SAT APR 21...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 07N77W TO 06N86W TO 05N113W. ITCZ CONTINUES FROM
05N113W TO BEYOND 05N140W. SCATTERED MODERATE ISOLATED STRONG
FROM 06N TO 08N BETWEEN 82W AND 84W AND FROM 04N TO 10N BETWEEN
108W AND 113W. ISOLATED MODERATE AND STRONG WITHIN 60 NM EITHER
SIDE OF A LINE FROM 08N92W TO 04N98W.

.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 0600 UTC APR 21 2018.
24 HOUR FORECAST VALID 0600 UTC APR 22 2018.
48 HOUR FORECAST VALID 0600 UTC APR 23 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 06N165E 1006 MB MOVING W SLOWLY. TROUGH FROM 13N167E TO LOW
TO 04N160E MOVING W SLOWLY. ISOLATED MODERATE TSTMS WITHIN 240
NM OF LOW AND TROUGH.
.24 HOUR FORECAST LOW 05N160E 1008 MB. TROUGH FROM LOW TO
13N162E.
.48 HOUR FORECAST LOW AND TROUGH MOVED W OF AREA.

.COLD FRONT W OF AREA MOVING E 10 KT.
.24 HOUR FORECAST FRONT FROM 30N161E TO 28N160E. S WINDS 20 TO
25 KT WITHIN 240 NM E OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N163E TO 24N160E. S TO SE WINDS
20 TO 30 KT WITHIN 420 NM E OF FRONT N OF 28N.
.48 HOUR FORECAST FRONT FROM 30N168E TO 24N160E. WINDS
DIMINISHED TO 20 KT OR LESS.

.NE TO E WINDS 20 TO 25 KT FROM 07N TO 21N E OF 152W...FROM 09N
TO 19N BETWEEN 152W AND 160W...AND FROM 13N TO 18N BETWEEN 169W
AND 177W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 09N TO 20N E OF
160W...FROM 11N TO 22N BETWEEN 160W AND 178E...AND FROM 10N TO
17N W OF 178E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 09N TO 19N E OF
155W...FROM 11N TO 25N BETWEEN 155W AND 178E...AND FROM 12N TO
17N W OF 170E.

.HIGH 30N180E 1023 MB NEARLY STATIONARY. RIDGE FROM HIGH TO
28N160E NEARLY STATIONARY.
.24 HOUR FORECAST HIGH DISSIPATED.

.OTHERWISE...WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST
AREA.

.SEAS 8 TO 10 FT N OF 06N E OF 152W...AND FROM 10N TO 18N
BETWEEN 152W AND 172W.
.24 HOUR FORECAST SEAS 8 TO 11 FT FROM 08N TO 20N E OF
160W...AND FROM 10N TO 18N BETWEEN 160W AND 170W. SEAS 8 TO 9 FT
FROM 14N TO 20N BETWEEN 170W AND 177E...AND N OF 27N BETWEEN
164W AND 175W.
.48 HOUR FORECAST SEAS 8 TO 10 FT FROM 10N TO 24N BETWEEN 160W
AND 174E...AND FROM 07N TO 18N E OF 160W. SEAS 8 TO 9 FT N OF
25N BETWEEN 151W AND 165W.

.OTHERWISE...SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.

.ITCZ FROM 05N140W TO 07N165W TO 08N176E. SCATTERED MODERATE TO
STRONG TSTMS WITHIN 300 NM N OF ITCZ W OF 162W. ISOLATED
MODERATE TSTMS WITHIN 270 NM N OF ITCZ E OF 162W...AND WITHIN
240 NM S OF ITCZ W OF 165W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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