High Seas Forecast
Issued by NWS

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000
FZPN02 KWBC 230525
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0545 UTC MON APR 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC APR 23.
24 HOUR FORECAST VALID 0000 UTC APR 24.
48 HOUR FORECAST VALID 0000 UTC APR 25.

.WARNINGS.

...STORM WARNING...
.LOW 52N172E 975 MB MOVING NE 15 KT. OVER FORECAST WATERS WITHIN
300 NM OF LOW CENTER EXCEPT 360 NM SW QUADRANT WINDS 35 TO 50
KT. SEAS 14 TO 28 FT S SEMICIRCLE AND 9 TO 18 FT N SEMICIRCLE.
ELSEWHERE FROM 44N TO 57N W OF 170E AND WITHIN 300 NM SE OF A
FRONT EXTENDING FROM 45N178E TO 40N171E WINDS 25 TO 35 KT. SEAS
8 TO 15 FT.
.24 HOUR FORECAST LOW 53N179W 968 MB. FRONT TO EXTEND FROM
54N166W TO 44N171W TO 34N180W. WITHIN 480 NM SE AND 720 NM S
QUADRANTS AND N OF 41N WITHIN 300 NM SE OF THE FRONT WINDS 35 TO
45 KT. SEAS 13 TO 25 FT...HIGHEST S. ELSEWHERE FROM 38N TO 55N W
OF 170W AND WITHIN 480 NM E AND SE OF FRONT WINDS 25 TO 35 KT.
SEAS 9 TO 18 FT.
.48 HOUR FORECAST LOW 58N169W 974 MB. WITHIN 600 NM SE AND 900
NM S QUADRANTS WINDS 30 TO 40 KT. SEAS 12 TO 24 FT. ELSEWHERE
WITHIN 960 NM NE AND E...1200 NM S...AND 900 NM W QUADRANTS
WINDS 25 TO 35 KT. SEAS 9 TO 18 FT. ALSO WITHIN 300 NM SE OF A
FRONT TO EXTEND FROM 50N152W TO 40N162W WINDS 20 TO 30 KT. SEAS
8 TO 16 FT.

...GALE WARNING...
.LOW 55N153W 990 MB MOVING N 10 KT. FRONT EXTENDS FROM 59N148W
TO 56N140W TO 46N140W TO 37N145W. OVER FORECAST WATERS WITHIN
240 NM N AND E OF THE FRONT...AND WITHIN 540 NM S AND SW
QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 20 FT. ELSEWHERE FROM
32N TO 60N BETWEEN 143W AND 168W WINDS TO 25 KT. SEAS 8 TO 16
FT.
.24 HOUR FORECAST LOW 58N153W 1003 MB. FRONT TO EXTEND FROM
59N139W TO 51N133W. WITHIN 120 NM NE AND E OF THE FRONT WINDS 25
TO 35 KT. SEAS 8 TO 16 FT. ELSEWHERE WITHIN 1200 NM SE QUADRANT
WINDS TO 25 KT. SEAS 8 TO 15 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

...GALE WARNING...
.LOW 58N170W 988 MB MOVING W 15 KT. OVER ICE FREE FORECAST
WATERS WITHIN 480 NM N SEMICIRCLE AND 240 NM S QUADRANT WINDS 25
TO 35 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW 57N179E 970 MB. WITHIN 360 NM NW
SEMICIRCLE WINDS 25 TO 35 KT. SEAS 10 TO 20 FT. ELSEWHERE N OF
55N W OF 162W WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED ABOVE
WITH LOW 58N169W.

...GALE WARNING...
.36 HOUR FORECAST NEW LOW 60N165W 973 MB. FRONT TO EXTEND FROM
LOW CENTER TO 56N159W TO 47N160W TO 40N167W. OVER ICE FREE
FORECAST WATERS WITHIN 360 NM E QUADRANT AND WITHIN 420 NM E AND
SE OF THE FRONT WINDS 25 TO 40 KT. SEAS 10 TO 19 FT...EXCEPT
SEAS TO 8 FT IN THE BERING SEA.
.48 HOUR FORECAST LOW 62N170W 967 MB. WITHIN 180 NM OF LOW
CENTER WINDS 25 TO 40 KT. SEAS TO 10 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.

.OVER FORECAST WATERS FROM 35N TO 44N BETWEEN 122W AND 128W AREA
OF NW TO N WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST CONDITIONS DIMINISHED.

.LOW 36N169E 1014 MB MOVING NE 35 KT. FRONT EXTENDS FROM 40N174E
TO LOW CENTER TO 30N167E. WITHIN 300 NN E OF FRONT WINDS 20 TO
30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DESCRIBED IN
WARNINGS SECTION ABOVE.

.48 HOUR FORECAST NEW LOW 38N137W 1019 MB. WITHIN 300 NM W AND
NW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 120 NM OF
42N177E.
.24 HOUR FORECAST DENSE FOG WITHIN 150 NM E OF A LINE FROM
51N166E TO 40N173E.
.48 HOUR FORECAST DENSE FOG WITHIN 90 NM OF 53N149W.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 60 NM E OF A
LINE FROM 49N140W TO 42N141W.
.24 HOUR FORECAST CONDITIONS IMPROVED.

.HIGH 46N127W 1029 MB MOVING N 05 KT.
.24 HOUR FORECAST HIGH 50N127W 1025 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 37N134W 1025 MB MOVING SW 20 KT.
.24 HOUR FORECAST HIGH 31N139W 1023 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 35N170W 1029 MB MOVING NE 30 KT.
.24 HOUR FORECAST HIGH 38N156W 1033 MB.
.48 HOUR FORECAST HIGH 38N150W 1035 MB.

.48 HOUR FORECAST HIGH 37N172E 1034 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 0000 UTC MON APR 23.
24 HOUR FORECAST VALID 0000 UTC TUE APR 24.
48 HOUR FORECAST VALID 0000 UTC WED APR 25.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.W OF LINE FROM 22N140W TO 18N134W TO 11N128W TO 07N140W WINDS
20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED NE AND NW SWELL.
.24 HOUR FORECAST FROM 09N TO 16N W OF 128W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN MIXED NE AND NW SWELL.
.48 HOUR FORECAST FROM 10N TO 16N W OF 124W WINDS 20 KT OR LESS.
SEAS 8 FT IN MIXED NE AND NW SWELL.

.N OF 28N BETWEEN 121W AND 130W WINDS 20 KT OR LESS. SEAS 8 TO 9
FT IN NW SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 10.5N TO 11.5N E OF 87.5W...INCLUDING GULF OF
PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST FROM 10.5N TO 11.5N E OF 87.5W...INCLUDING
GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 10.5N TO 11.5N E OF 87.5W...INCLUDING
GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.S OF 02.5S W OF 116W WINDS 20 KT OR LESS. SEAS 8 FT IN SW SWELL.
.24 HOUR FORECAST  S OF 01S W OF 90W WINDS 20 KT OR LESS. SEAS 8
TO 9 FT IN SW SWELL.
.48 HOUR FORECAST S OF 00N W OF 85W WINDS 20 KT OR LESS. SEAS 8
FT IN SW SWELL.

.30 HOUR FORECAST COLD FRONT APPROACH 30N140W. N OF 29N W OF
137W WINDS 20 KT OR LESS. SEAS 8 FT IN FRESH NW SWELL.
.48 HOUR FORECAST WEAKENING COLD FRONT FROM 30N137W TO BEYOND
28N140W. NW OF FRONT WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW
SWELL.

.30 HOUR FORECAST GULF OF TEHUANTEPEC N OF 14.5N BETWEEN 94.5W
AND 95W N WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 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 0245 UTC MON APR 23...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 09N73W TO 06N85W TO 05N95W. ITCZ CONTINUES FROM
05N95W TO 05N110W TO 04N125W TO BEYOND 05N140W. SCATTERED
MODERATE ISOLATED STRONG FROM 04N TO 10N BETWEEN 82W AND
86W...FROM 05N TO 11N BETWEEN 106W AND 110W...WITHIN 120 NM
EITHER SIDE OF LINE FROM 13N113W TO 05N119W AND WITHIN 120 NM
EITHER SIDE OF LINE FROM 04N130W TO 12N135W.

.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.

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

SYNOPSIS VALID 0000 UTC APR 23 2018.
24 HOUR FORECAST VALID 0000 UTC APR 24 2018.
48 HOUR FORECAST VALID 0000 UTC APR 25 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N166E TO 24N160E MOVING E 10 KT.
.24 HOUR FORECAST WEAKENING FRONT FROM 30N173E TO 24N169E. NE
WINDS 20 TO 25 KT N OF 29N W OF 165E.
.48 HOUR FORECAST FRONT DISSIPATED OVER FORECAST AREA. E TO NE
WINDS 20 TO 25 KT N OF 28N BETWEEN 162E AND 175E.

.FRONT FROM 30N160W TO 29N170W MOVING SE 10 KT.
.24 HOUR FORECAST FRONT FROM 30N146W TO 27N156W.
.48 HOUR FORECAST FRONT FROM 29N140W TO 26N152W.

.TROUGH FROM 10N175E TO 06N165E MOVING W SLOWLY. ISOLATED
MODERATE TSTMS S OF 11S W OF 167E ANF FROM 06S TO 11S BETWEEN
174E AND 175W.
.24 HOUR FORECAST TROUGH FROM 10N175E TO 07S165E DISSIPATING.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 30N152W TO 24N156W MOVING E SLOWLY AND DISSIPATING.
.24 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N176E TO 25N164E MOVING NE 10 KT.

.RIDGE FROM 30N145W TO 28N150W MOVING NE 10 KT.

.NE TO E WINDS 20 TO 25 KT FROM 09N TO 18N BETWEEN 148W AND
165W...FROM 12N TO 22N BETWEEN 165W AND 174E...AND FROM 10N TO
17N W OF 164E.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 12N TO 21N
BETWEEN 152W AND 170E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 10N TO TO 22N W
OF 152W.

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

.SEAS 8 TO 10 FT FROM 07N TO 18N E OF 167W AND FROM 10N TO 24N
BETWEEN 167W AND 172E. SEAS 8 TO 9 FT N OF LINE FROM 30N154W TO
24N160W TO 24N167W.
.24 HOUR FORECAST SEAS 8 TO 10 FT FROM 10N TO 24N BETWEEN 148W
AND 170E AND N OF 24N BETWEEN 142W AND 160W.
.48 HOUR FORECAST SEAS 8 TO 10 FT FROM 10N TO 23N E OF 176E AND
FROM 10N TO 20N W OF 176E.

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

.ITCZ FROM 06N140W TO 07N155W TO 06N166W. ISOLATED MODERATE
TSTMS WITHIN 150 NM N OF ITCZ E OF 156W AND ELSEWHERE WITHIN 90
NM OF ITCZ.

$$

.FORECASTER BURKE. HONOLULU HI.



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