542
FZPN40 PHFO 300340
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SAT AUG 30 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 30 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 31 2025.
48 HOUR FORECAST VALID 0000 UTC SEP 01 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 18N152W 14N153W 10N152W MOVING W SLOWLY. WINDS 20 TO 25 KT
WITHIN 60 NM OF TROUGH. SEAS 2.5 TO 3.0 M FROM 12N TO 17N BETWEEN
148W AND 153W.
.24 HOUR FORECAST TROUGH 15N155W 12N156W 10N156W. WINDS EASED
20 KT OR LESS. SEAS SUBSIDED TO 2.5 M OR LOWER.
.48 HOUR FORECAST TROUGH 18N158W 08N161W.

.TROUGH 16N167W 13N168W 10N168W MOVING W SLOWLY. ISOLATED MODERATE
TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 17N173W 10N173W.
.48 HOUR FORECAST TROUGH 17N175W 10N175W.

.TROUGH 14N176E 10N176E 05N177E MOVING W SLOWLY. ISOLATED MODERATE
TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 14N173E 08N173E.
.48 HOUR FORECAST TROUGH 14N169E 08N164E.

.TROUGH 10N160E 07N161E MOVING W SLOWLY. ISOLATED MODERATE TSTMS
FROM 10N TO 14N W OF 163E.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

.TROUGH 25N163E 23N163E 22N164E MOVING W SLOWLY.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.

.TROUGH 30N156W 29N159W 28N162W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH ABSORBED BY FRONT DESCRIBED BELOW.

.24 HOUR FORECAST NEW FRONT 30N151W 27N159W 30N169W.
.48 HOUR FORECAST FRONT 30N149W 27N156W 30N167W.

.24 HOUR FORECAST NEW TROUGH 27N165E 23N165E.
.48 HOUR FORECAST TROUGH 27N164E 24N163E.

.WINDS 20 KT OR LESS AND SEAS 2.5 M OR LOWER OVER REMAINDER OF
FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 21N TO 24N BETWEEN 171E AND 169E.

.ITCZ FROM 10N140W 10N143W 11N147W...11N157W 11N165W...AND 11N171W
09N180E. ISOLATED MODERATE TSTMS WITHIN 210 NM OF ITCZ W OF
157W...AND WITHIN 120 NM ELSEWHERE.

$$

.FORECASTER AHUE. HONOLULU HI.