081
FZPN40 PHFO 231433
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC SAT AUG 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 23 2025.
24 HOUR FORECAST VALID 1200 UTC AUG 24 2025.
48 HOUR FORECAST VALID 1200 UTC AUG 25 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH 30N175W 25N170W MOVING NW SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF TROUGH N OF 27N.
.24 HOUR FORECAST TROUGH 30N178E 24N169E.
.48 HOUR FORECAST TROUGH 30N180E 25N177E.

.TROUGH 30N177E 27N175E 23N172E MOVING N SLOWLY. SCATTERED MODERATE
TSTMS WITHIN 210 NM E OF TROUGH.
.24 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH 26N165E 26N160E MOVING N SLOWLY. SCATTERED MODERATE TSTMS N
OF 23N BETWEEN 163E AND 171E. ISOLATED MODERATE TSTMS ELSEWHERE N
OF 21N W OF 173E.
.24 HOUR FORECAST TROUGH 28N166E 24N160E.
.48 HOUR FORECAST TROUGH 27N163E 24N160E.

.TROUGH 15N160W 12N160W 07N160W MOVING W SLOWLY. WINDS 20 TO 25
KT WITHIN 120 NM OF ITCZ N OF 13N.
.24 HOUR FORECAST TROUGH 15N167W 08N166W. WINDS 20 TO 25 KT WITHIN
90 NM OF TROUGH N OF 13N.
.48 HOUR FORECAST TROUGH 13N171W 07N172W.

.TROUGH 14N176E 04N175E MOVING W SLOWLY. WINDS 20 TO 25 KT WITHIN
120 NM OF TROUGH N OF 11N. ISOLATED MODERATE TSTMS WITHIN 270 NM
OF TROUGH.
.24 HOUR FORECAST TROUGH 15N167E 09N167E.
.48 HOUR FORECAST TROUGH 12N162E 08N160E.

.WINDS 20 TO 25 KT FROM 12N TO 20N E OF 152W.
.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 12N TO 17N E OF 154W.
.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 11N TO 16N BETWEEN 160W
AND 148W.

.SEAS 2.5 TO 3.0 M FROM 12N TO 20N E OF 160W...AND FROM 10N TO
16N BETWEEN 175E AND 178W.
.24 HOUR FORECAST SEAS 2.5 TO 3.0 M FROM 11N TO 17N BETWEEN 155W
AND 143W.
.48 HOUR FORECAST SEAS 2.5 TO 3.0 M FROM 12N TO 16 BETWEEN 160W AND
154W.

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

.MONSOON TROUGH 11N140W 10N152W. ISOLATED MODERATE TSTMS WITHIN 150
N OF TROUGH.

.ITCZ 09N163W 06N172W 08N178W. ISOLATED MODERATE TSTMS WITHIN 210 NM
OF ITCZ.

.ISOLATED MODERATE TSTMS S OF 10S W OF 170E.

$$

.FORECASTER SHIGESATO. HONOLULU HI.