260
FZPN40 PHFO 201042
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC WED AUG 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 20 2025.
24 HOUR FORECAST VALID 0600 UTC AUG 21 2025.
48 HOUR FORECAST VALID 0600 UTC AUG 22 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 30N166W TO 27N166W TO 27N168W MOVING SLOWLY W.
ISOLATED MODERATE TSTMS WITHIN 90 NM E OF TROUGH N OF 27N.
.24 HOUR FORECAST TROUGH FROM 30N169W TO 27N152W.
.48 HOUR FORECAST WEAKENED TROUGH MOVED N AND DISSIPATED.

.TROUGH FROM 30N179E TO 25N179W TO 21N177E MOVING W SLOWLY.
ISOLATED MODERATE TSTMS FROM 23N TO 28N BETWEEN 177W TO 176E.
.24 HOUR FORECAST WEAKENED TROUGH FROM 30N177E TO 26N175E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 30N163E TO 25N163E TO 22N160E NEARLY STATIONARY.
SCATTERED MODERATE TSTMS N OF 22N W OF 163E.
.24 HOUR FORECAST WEAKENED TROUGH MOVED N AND DISSIPATED.

.24 HOUR FORECAST NEW TROUGH FROM 14N148W TO 11N150W. E WINDS 20
TO 25 KT AND 2.5 TO 3 M SEAS FROM 13N TO 14N BETWEEN 146W AND
149W.
.48 HOUR FORECAST TROUGH FROM 14N153W TO 12N155W. E WINDS 20 TO
25 KT AND SEAS 2.5 TO 3 M FROM 13N TO 16N BETWEEN 151W AND 156W.

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

.MONSOON TROUGH FROM 10N140W TO 12N148W TO 11N153W THENCE ITCZ TO
08N170W TO 09N175W TO 10N179W TO 09N172E. SCATTERED MODERATE
TSTMS WITHIN 1800 NM N OF MONSOON TROUGH E OF 147W. ISOLATED
MODERATE TSTMS WITHIN 90 NM EITHER SIDE OF ITCZ.

.SCATTERED MODERATE TSTMS WITHIN 270 NM EITHER SIDE OF A LINE FROM
11N176W TO 03N160E.


$$

.FORECASTER BLOOD. HONOLULU HI.