176
FZPN40 PHFO 282244
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC THU AUG 28 2025

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 AUG 28 2025.
24 HOUR FORECAST VALID 1800 UTC AUG 29 2025.
48 HOUR FORECAST VALID 1800 UTC AUG 30 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 11N147W 1012 MB. TROUGH FROM 15N146W TO LOW TO 09N150W.
TROUGH AND LOW MOVING NW SLOWLY. WINDS 20 TO 25 KT AND SEAS 2.5
TO 3 M WITHIN 90 NM N SEMICIRCLE.
.24 HOUR FORECAST LOW NEAR 13N150W 1012 MB. TROUGH FROM 15N150W
TO LOW TO 09N155W. WINDS 20 TO 25 KT AND SEAS 2.5 TO 3 M WITHIN 90
NM N SEMICIRCLE OF LOW.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH 14N154W 09N163W. WINDS
EASED TO 20 KT OR LESS AND SEAS LOWERED TO 2.5 M OR LOWER.

.TROUGH 28N172E 24N168E 19N166E MOVING W SLOWLY.
.24 HOUR TROUGH DISSIPATED.

.TROUGH 15N164W 09N161W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH 15N166W 11N169W 09N174W.
.48 HOUR FORECAST TROUGH 17N171W 10N174W.

.TROUGH 30N162W 25N166W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N159W 27N163W.
.48 HOUR FORECAST TROUGH ABSORBED BY FRONT DESCRIBED BELOW.

.48 HOUR FORECAST NEW FRONT 30N155W 29N160W 30N166W.

.48 HOUR FORECAST NEW TROUGH 12N179W 10N174E 06N166E.

.WINDS 20 KT OR LESS REMAINDER OF FORECAST AREA.

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

.MONSOON TROUGH 10N140W 09N145W. ITCZ 08N152W 09N157W...AND
09N164W 08N177W 08N160E. ISOLATED MODERATE TSTMS WITHIN 240 NM OF
ITCZ.

.ISOLATED MODERATE TSTMS 17N TO 14N BETWEEN 165E AND 169E.

$$

.FORECASTER TROTTER. HONOLULU HI.