502
FZPN40 PHFO 281501
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC AUG 28 2025.
24 HOUR FORECAST VALID 1200 UTC AUG 29 2025.
48 HOUR FORECAST VALID 1200 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.
.24 HOUR FORECAST LOW 12N150W 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 DISSIPATED. TROUGH 14N152W 10N154W. WINDS
20 TO 25 KT AND SEAS 2.5 TO 3 M WITHIN 60 NM N SEMICIRCLE OF LOW.

.TROUGH 16N160W 10N162W MOVING W 10 KT. NE WINDS 20 TO 25 KT AND
SEAS 2.5 TO 3 M WITHIN 180 NM OF TROUGH. ISOLATED MODERATE TSTMS
WITHIN 120 NM NW OF LOW AND TROUGH.
.24 HOUR FORECAST TROUGH 16N166W 11N167W. WINDS 20 TO 25 KT AND SEAS
2.5 TO 3.5 M FROM 13N TO 16N BETWEEN 163W AND 168W.
.48 HOUR FORECAST TROUGH 15N160W 12N170W. WINDS EASED TO 20 KT OR LESS
AND SEAS EASED TO 2.5 M OR LESS.

.TROUGH 15N172W 10N173W MOVING W 15 KT AND DISSIPATING. ISOLATED MODERATE
TSTMS WITHIN 30 NM OF LOW.
.24 HOUR TROUGH AND LOW DISSIPATED.

.TROUGH 26N170E 21N169E MOVING W 10 KT AND DISSIPATING.
.24 HOUR FORECAST TROUGH 26N165E 21N164E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 30N163W 25N166W NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N160W 26N161W.
.48 HOUR FORECAST TROUGH 30N156W 26N162W.

.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 09N164W 08N180W 10N170E
08N160E. SCATTERED MODERATE TSTMS FROM ITCZ TO 16N BETWEEN 174E
AND 167E. ISOLATED MODERATE TSTMS WITHIN 240 NM OF TROUGH.

$$

.FORECASTER SHIGESATO. HONOLULU HI.