High Seas Forecast
Issued by NWS

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FZPN40 PHFO 282238
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC FRI APR 28 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE
HIGHER THAN 10-MINUTE AVERAGE WINDS.

SECURITE

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1800 UTC APR 28 2017.
24 HOUR FORECAST VALID 1800 UTC APR 29 2017.
48 HOUR FORECAST VALID 1800 UTC APR 30 2017.

.WARNINGS.

...GALE WARNING...
.LOW DEVELOPING ALONG TROUGH. TROUGH FROM 18N158W TO 24N157W TO
27N155W THENCE A STATIONARY FRONT TO 30N154W. WINDS S 20 TO 25 KT
WITHIN 180 NM E OF FRONT. WINDS NW TO N 20 TO 30 KT FROM 30N TO
20N BETWEEN 168W AND 157W. ISOLATED MODERATE TO STRONG TSTMS N
OF 24N BETWEEN 158W AND 152W.
.12 HOUR FORECAST LOW NEAR 28N154W 1012 MB. FRONT FROM LOW TO
30N154W. TROUGH FROM LOW TO 23N157W. WINDS SE TO S 20 TO 25 KT
WITHIN 240 NM NE OF A LINE FROM 28N154W TO 21N145W. WINDS NE TO
N 20 TO 25 KT ELSEWHERE WITHIN 480 NM NW OF A LINE FROM 30N154W
TO 20N162W.
.24 HOUR FORECAST LOW NEAR 29N156W 1010 MB. DEVELOPING FRONT FROM
LOW TO 23N157W TO 18N163W. WIND SE 20 TO 30 KT WITHIN 300 NM NE
OF A LINE FROM 28N154W TO 21N141W. WINDS NE TO NW 20 TO 35 KT
WITHIN 360 NM N AND NW OF A LINE FROM 30N154W TO 23N168W.
.48 HOUR FORECAST LOW NEAR 25N161W 1011 MB. FRONT FROM 27N155W
TO 23N157W TO 18N164W. WINDS NE TO NW 20 TO 30 KT WITHIN
300 NM OF LOW NW SEMICIRCLE. WINDS SE TO E 20 TO 25 KT WITHIN
240 NM E OF FRONT.

.SYNOPSIS AND FORECAST.

.HIGH DEVELOPING ALONG RIDGE. RIDGE FROM 30N178E TO 22N160E.
.24 HOUR FORECAST RIDGE FROM 30N178W TO 25N160E.
.48 HOUR FORECAST HIGH NEAR 30N178W 1023 MB. RIDGE FROM HIGH TO
25N160E.

.RIDGE FROM 30N142W TO 24N150W.
.24 HOUR FORECAST RIDGE FROM 28N140W TO 18N144W.
.48 HOUR FORECAST RIDGE FROM 30N140W TO 16N148W.

.OTHERWISE AND ELSEWHERE WINDS NE TO E 20 TO 30 KT FROM 25N
TO 08N BETWEEN 165E AND 157W. ALSO WINDS S TO SW 20 TO 25 KT N
OF A LINE FROM 30N165E TO 28N160E.
.12 HOUR FORECAST WINDS NE TO E 20 TO 25 KT FROM 22N TO 06N
BETWEEN 165E AND 167W. S TO SW WINDS DIMINISHED TO 20 KT OR LESS.
.24 HOUR FORECAST WINDS NE TO E 20 TO 25 KT WITHIN A POLYGON
BOUND BY 26N170W 20N162W 07N178W 12N160E 20N171E 26N170W.
.48 HOUR FORECAST WINDS NE TO E 20 TO 25 KT WITHIN A POLYGON
BOUND BY 23N173W 15N173W 16N161W 23N173W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.OTHERWISE AND ELSEWHERE SEAS 8 TO 11 FT WITHIN A POLYGON BOUND
BY 28N157W 18N168W 06N175W 15N160E 25N177E 28N157W.
.24 HOUR FORECAST SEAS 8 TO 13 FT WITHIN A POLYGON BOUND BY
30N165W 30N149W 14N168W 04N178W 11N160E 18N160E 23N170E 27N167W
30N165W.
.48 HOUR FORECAST SEAS 8 TO 13 FT FROM 30N TO 22N BETWEEN 169W
AND 160W. ALSO SEAS 8 TO 9 FT WITHIN A POLYGON BOUND BY 23N171W
04N173E 19N160E 23N179E 23N171W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

OTHERWISE SCATTERED MODERATE TO STRONG TSTMS S OF 06N W OF 168E.
ALSO ISOLATED MODERATE TO STRONG TSTMS S OF 05N BETWEEN 165W
AND 150W.

$$

.FORECASTER BEDAL. HONOLULU HI.



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