High Seas Forecast
Issued by NWS

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FZPN40 PHFO 251512
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC MON SEP 25 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC SEP 25 2017.
24 HOUR FORECAST VALID 1200 UTC SEP 26 2017.
48 HOUR FORECAST VALID 1200 UTC SEP 27 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 12N145W 1011 MB MOVING W SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF LOW.
.24 HOUR FORECAST LOW 12N146W 1011 MB.
.48 HOUR FORECAST LOW DISSIPATED.

.FRONT FROM 30N167W TO 26N175W TO 26N179E MOVING ESE 10 KT. ISOLATED MODERATE
TSTMS WITHIN 90 NM OF FRONT N OF 28N.
.24 HOUR FORECAST FRONT FROM 30N160W TO 26N175W.
.48 HOUR FORECAST FRONT FROM 30N153W TO 27N165W.

.FRONT 30N162E TO 29N160E MOVING ESE SLOWLY.
.24 HOUR FORECAST FRONT NEAR 30N160E. WINDS SW 20 TO 25 KT N OF
28N W OF 163W.
.48 HOUR FORECAST FRONT FROM 30N167E TO 27N160E. WINDS DIMINISHED
TO 20 KT OR LESS.

.TROUGH FROM 27N152W TO 21N154W MOVING E 10 KT. ISOLATED MODERATE
TSTMS WITHIN 90 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 26N156W TO 20N154W DISSIPATING.
.48 HOUR FORECAST TROUGH DISSIPATED.

TROUGH FROM 22N150W TO 15N149W MOVING E 10 KT. ISOLATED MODERATE
TSTMS WITHIN 120 NM E OF TROUGH N OF 20N.
.24 HOUR FORECAST TROUGH 21N152W TO 16N152W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 13N170W TO 06N160E MOVING W 10 KT.
SCATTERED MODERATE TO STORNG TSTMS WITHIN 150 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 11N172W TO 09N160E DISSIPATING.
.48 HOUR FORECAST TROUGH DISSIPATED.

.HIGH 28N175E 1016 MB MOVING SE SLOWLY. RIDGE FROM HIGH TO
25N160E NEARLY STATIONARY.
.24 HOUR FORECAST HIGH 27N177E 1017 MB.
.48 HOUR FORECAST HIGH 28N172E 1018 MB.

.RIDGE FROM 30N152W TO 25N177W MOVING SE SLOWLY.

.WINDS 20 KT OR LESS AND SEAS 8 FT OR LOWER OVER REMAINDER OF
AREA.

.ISOLATED MODERATE TSTMS FROM 16N TO 18N BETWEEN 171W AND 174W.

.MONSOON TROUGH FROM 11N140W TO 11N160W. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF MONSOON TROUGH.

$$

.FORECASTER MORRISON. HONOLULU HI.



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