National Weather Service Marine Forecast FZPN40 PHFO

FZPN40 PHFO 172216
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC FRI APR 17 2026

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 180W

SYNOPSIS VALID 1800 UTC APR 17 2026. 24 HOUR FORECAST VALID 1800 UTC APR 18 2026. 48 HOUR FORECAST VALID 1800 UTC APR 19 2026.

.WARNINGS.

.NONE. .SYNOPSIS AND FORECAST.

.FRONT 30N149W 27N152W THENCE TROUGH 24N157W MOVING E SLOWLY. .24 HOUR FORECAST FRONT 30N142W 28N148W. TROUGH DISSIPATED. .48 HOUR FORECAST FRONT 27N140W 25N147W.

.TROUGH 28N169W 22N171W 16N174W NEARLY STATIONARY. ISOLATED MODERATE TSTMS FROM 26N TO 18N BETWEEN TROUGH AND 165W. .24 HOUR FORECAST TROUGH 30N167W 21N170W 14N175W 10N180W. .48 HOUR FORECAST TROUGH 30N164W 23N166W 14N167W.

.48 HOUR FORECAST NEW FRONT 30N176W 28N180W. SEAS 2.5 TO 3 M NW OF LINE 30N176W 27N180W.

.WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA.

.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.

.ITCZ 05N140W 05N152W 05N160W 06N170W 05N180W. NUMEROUS MODERATE TSTMS WITHIN 270 NM OF ITCZ.

.ISOLATED MODERATE TSTMS FROM 25N TO 22N BETWEEN 163W AND 160W.

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.FORECASTER TROTTER. HONOLULU HI.