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National Weather Service Marine Forecast FZPN40 PHFO

FZPN40 PHFO 231520
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC WED AUG 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 AUG 23 2017.
24 HOUR FORECAST VALID 1200 UTC AUG 24 2017.
48 HOUR FORECAST VALID 1200 UTC AUG 25 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 12N171E TO 10N160E MOVING NW 10 KT. ISOLATED
MODERATE TSTMS WITHIN 180 NM OF TROUGH...AND FROM 05N TO 08N
BETWEEN 180E AND 176E.
.24 HOUR FORECAST TROUGH FROM 11N170E TO 09N160E.
.48 HOUR FORECAST TROUGH FROM 12N164E TO 10N160E.

.TROUGH FROM 23N161E TO 17N161E MOVING W 15 KT. SCATTERED MODERATE
TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

.RIDGE FROM 30N170E TO 29N160E MOVING N SLOWLY.

.24 HOUR FORECAST E WINDS 20 TO 25 KT FROM 14N TO 20N BETWEEN
150W AND 160W.
.48 HOUR FORECAST E WINDS DIMINISHED TO 20 KT OR LESS.

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

.SEAS 8 TO 10 FT N OF 19N E OF 146W.
.24 HOUR FORECAST SEAS 8 TO 9 FT FROM N OF 24N E OF 142W.
.48 HOUR FORECAST SEAS 8 TO 9 FT FROM N OF 27N E OF 142W.

.OTHERWISE SEAS 8 FT OR LESS OVER REMAINDER OF AREA.

.MONSOON TROUGH FROM 10N140W TO 12N150W TO 10N160W. SCATTERED
MODERATE TSTMS WITHIN 180 NM OF TROUGH.

ISOLATED MODERATE TSTMS FROM 24N TO 27N BETWEEN 161W TO 167W

AND FROM 22N TO 25N BETWEEN 175E TO 172E.



.FORECASTER MORRISON. HONOLULU HI.