656
FZPN40 PHFO 301019
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 30 2025.
24 HOUR FORECAST VALID 0600 UTC AUG 31 2025.
48 HOUR FORECAST VALID 0600 UTC SEP 01 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 15N153W 13N154W 11N153W MOVING NW SLOWLY. WINDS 20 TO 25 KT
FROM 16N TO 14N BETWEEN 154W AND 151W. SEAS 2.5 TO 3.0 M FROM 17N
TO 13N BETWEEN 154W AND 149W. ISOLATED MODERATE TSTMS WITHIN 90 NM
OF TROUGH.
.24 HOUR FORECAST TROUGH 16N157W 14N156W 11N156W. WINDS EASED 20
KT OR LESS. SEAS SUBSIDED TO 2.5 M OR LOWER.
.48 HOUR FORECAST TROUGH 20N159W 17N160W 12N158W.

.TROUGH 15N171W 10N171W MOVING W SLOWLY. ISOLATED MODERATE TO
LOCALLY STRONG TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 15N173W 11N174W.
.48 HOUR FORECAST TROUGH 16N176W 10N176W.

.TROUGH 11N175E 06N176E MOVING W SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 13N168E 08N169E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 30N154W 29N159W MOVING E 10 KT.
.24 HOUR FORECAST TROUGH MERGES WITH FRONT DESCRIBED BELOW.

.24 HOUR FORECAST NEW FRONT 30N152W 28N156W 30N168W.
.48 HOUR FORECAST FRONT 30N149W 28N154W 30N165W.

.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 10N140W 11N147W 13N152W...12N155W 09N160W 09N166W 13N169W...AND
13N171W 09N179E 10N176E. ISOLATED MODERATE TSTMS WITHIN 210 NM OF
ITCZ W OF 165W...AND WITHIN 120 NM ELSEWHERE.


$$

.FORECASTER PIERCE. HONOLULU HI.