464
FZPN40 PHFO 280912
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 28 2025.
24 HOUR FORECAST VALID 0600 UTC AUG 29 2025.
48 HOUR FORECAST VALID 0600 UTC AUG 30 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 11N145W 1011 MB MOVING NW SLOWLY. WINDS 20 TO 25 KT AND
SEAS 2.5 TO 3 M WITHING 60 NM N SEMICIRCLE. ISOLATED MODERATE
TSTMS WITHIN 30 NM OF LOW.
.24 HOUR FORECAST LOW 12N146W 1010 MB. WINDS 20 TO 25 KT AND SEAS
2.5 TO 3 M WITHIN 90 NM N SEMICIRCLE OF LOW.
.48 HOUR FORECAST LOW 13N153W 1010 MB. WINDS 20 TO 25 KT AND SEAS
2.5 TO 3 M WITHIN 90 NM N SEMICIRCLE OF LOW.

.LOW NEAR 11N160W 1010 MB. TROUGH 15N157W TO LOW. LOW AND TROUGH MOVING
W 10 KT. NE WINDS 20 TO 25 KT AND SEAS 2.5 TO 3 M WITHIN 180 NM N
AND W OF LOW AND TROUGH. ISOLATED MODERATE TSTMS WITHIN 120 NM NW
OF LOW AND TROUGH.
.24 HOUR FORECAST LOW NEAR 13N165W 1011 MB. TROUGH 15N164W TO LOW TO
09N166W. WINDS 20 TO 25 KT AND SEAS 2.5 TO 3.5 M FROM 12N TO 16N BETWEEN
161W AND 166W.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH 16N168W 10N171W. WINDS EASED
TO 20 KT OR LESS AND SEAS EASED TO 2.5 M OR LESS.

.LOW 11N172W 1011 MB. TROUGH 15N171W TO LOW MOVING W 15 KT AND DISSIPATING.
ISOLATED MODERATE TSTMS WITHIN 30 NM OF LOW.
.24 HOUR TROUGH AND LOW DISSIPATED.

.TROUGH 26N170E 21N171E MOVING W 10 KT AND DISSIPATING.
.24 HOUR FORECAST TROUGH 26N165E 22N165E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 30N162W 25N165W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N161W 25N163W.
.48 HOUR FORECAST TROUGH 30N157W 24N162W.

.WINDS 20 KT OR LESS REMAINDER OF FORECAST AREA.

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

.MONSOON TROUGH 10N140W 09N143W. ITCZ 09N163W 08N180W 09N170E
08N160E. ISOLATED MODERATE TSTMS WITHIN 240 NM OF TROUGH.

.ISOLATED MODERATE TSTMS FROM 12N TO 16N BETWEEN 175E AND 165E.

$$

.FORECASTER SHIGESATO. HONOLULU HI.