138
FZPN40 PHFO 310309
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SUN AUG 31 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 31 2025.
24 HOUR FORECAST VALID 0000 UTC SEP 01 2025.
48 HOUR FORECAST VALID 0000 UTC SEP 02 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N155W 29N162W 30N170W NEARLY STATIONARY.
.24 HOUR FORECAST FRONT 30N150W 28N153W THENCE TROUGH
25N155W.
.48 HOUR FORECAST FRONT WEAKENS TO TROUGH 30N148W 27N156W.

.TROUGH 30N152W 28N157W MOVING E 10 KT.
.24 HOUR FORECAST TROUGH MERGES WITH FRONT DESCRIBED ABOVE.

.LOW NEAR 14N154W 1010 MB. TROUGH FROM LOW TO 16N152W AND FROM
LOW TO 13N156W MOVING W 10 KT. ISOLATED TSTMS WITHIN 120 NM OF
LOW.
.24 HOUR FORECAST LOW WEAKENS TO TROUGH 15N155W 13N158W.
.48 HOUR FORECAST TROUGH 17N162W 13N158W 10N155W.

.TROUGH 15N170W 12N171W 10N173W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED.

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

.ITCZ 09N140W 10N145W 13N149W...AND 11N157W 09N169W...AND 13N174W
12N180W 12N165E. ISOLATED TSTMS WITHIN 120 NM OF ITCZ.

$$

.FORECASTER PECHACEK. HONOLULU HI.