777
FZPN40 PHFO 301504
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC AUG 30 2025.
24 HOUR FORECAST VALID 1200 UTC AUG 31 2025.
48 HOUR FORECAST VALID 1200 UTC SEP 01 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N157W 29N165W 30N173W NEARLY STATIONARY.
.24 HOUR FORECAST FRONT 30N151W 28N156W 30N168W.
.48 HOUR FORECAST FRONT 30N149W 28N153W 30N163W.

.TROUGH 30N153W 29N157W MOVING E 10 KT.
.24 HOUR FORECAST TROUGH MERGES WITH FRONT DESCRIBED ABOVE.

.LOW NEAR 13N153W 1010 MB. TROUGH 15N153W 13N154W TO LOW TO
12N155W 10N156W. LOW AND TROUGH MOVING NW SLOWLY. WINDS 20 TO 25
KT FROM 16N TO 15N BETWEEN 154W AND 152W. SEAS 2.5 TO 3.0 M FROM
17N TO 14N BETWEEN 155W AND 151W. ISOLATED MODERATE TSTMS WITHIN
90 NM OF TROUGH.
.24 HOUR FORECAST LOW NEAR 15N157W 1011 MB. TROUGH 16N156W TO LOW
TO 13N156W 12N157W. WINDS EASED 20 KT OR LESS. SEAS SUBSIDED TO
2.5 M OR LOWER.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH 16N160W 13N160W 12N159W.

.TROUGH 16N171W 12N172W 10N172W MOVING SW SLOWLY. ISOLATED
MODERATE TO LOCALLY STRONG TSTMS WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 15N173W 11N174W.
.48 HOUR FORECAST TROUGH 14N176W 09N177W.

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

.ISOLATED MODERATE TSTMS FROM 16N TO 10N W OF 163E...AND FROM 25N
TO 21N BETWEEN 166E AND 171E.

.ITCZ 08N140W 11N146W 13N152W...12N156W 09N161W 13N170W...AND
13N172W 11N177W 12N179E 10N170E. ISOLATED MODERATE TSTMS WITHIN
210 NM OF ITCZ W OF 175W...AND WITHIN 120 NM ELSEWHERE.

.ISOLATED MODERATE TSTMS FROM 17N TO 09N W OF 163E...AND FROM 07N
TO 03N W OF 168E.

$$

.FORECASTER PIERCE. HONOLULU HI.