138
FZPN40 PHFO 290327
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC FRI AUG 29 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 29 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 30 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 31 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 11N148W 1009 MB. TROUGH FROM 15N147W TO LOW TO 08N151W.
TROUGH AND LOW MOVING NW SLOWLY. WINDS 20 TO 25 KT AND SEAS 2.5
TO 3 M WITHIN 90 NM N SEMICIRCLE. ISOLATED MODERATE TSTMS FROM 11N
TO 09N BETWEEN 150W AND 147W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH 14N151W 08N159W. WINDS
EASED TO 20 KT OR LESS. SEAS 2.5 TO 3 M FROM 16N TO 13N BETWEEN
153W AND 143W.
.48 HOUR FORECAST TROUGH 15N156W 08N164W. SEAS LOWERED TO 2.5 M
OR LOWER.

.TROUGH 25N167W 20N166W MOVING W SLOWLY.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 16N163W 11N164W 08N167W MOVING W 10 KT. ISOLATED MODERATE
TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 16N166W 09N173W.
.48 HOUR FORECAST TROUGH 17N170W 09N175W.

.TROUGH 30N161W 27N164W MOVING E 10 KT.
.24 HOUR FORECAST TROUGH 30N156W 27N161W.
.48 HOUR FORECAST TROUGH ABSORBED BY FRONT DESCRIBED BELOW.

.48 HOUR FORECAST NEW FRONT 30N153W 28N159W 30N167W.

.WINDS 20 KT OR LESS REMAINDER OF FORECAST AREA.

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

.ITCZ 10N140W 10N145W...09N152W 09N159W...AND 10N169W 09N175W 07N177E
07N160E. ISOLATED MODERATE TSTMS WITHIN 240 NM OF ITCZ.

.ISOLATED MODERATE TSTMS FROM 25N TO 16N W OF 165E.

$$

.FORECASTER TROTTER. HONOLULU HI.