063
FZPN40 PHFO 200316
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 20 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 21 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 22 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 30N143W TO 27N147W MOVING W SLOWLY.
.24 HOUR FORECAST TROUGH FROM 30N150W TO 28N152W.
.48 HOUR FORECAST TROUGH FROM 30N143W TO 27N147W.

.TROUGH FROM 30N173W TO 28N174W MOVING NW SLOWLY. ISOLATED MODERATE
TSTMS N OF 27N BETWEEN 165W AND 168W.
.24 HOUR FORECAST TROUGH MOVED N OF AREA.

.TROUGH FROM 30N176E TO 26N170E NEARLY STATIONARY. ISOLATED
MODERATE TSTMS N OF 26N BETWEEN 178W AND 169E.
.24 HOUR FORECAST TROUGH FROM 30N174E TO 25N171E.
.48 HOUR FORECAST TROUGH FROM 30N176E TO 27N170E.

.TROUGH FROM 30N164E TO 28N163E TO 27N160E MOVING NW SLOWLY.
ISOLATED MODERATE TSTMS WITHIN 120 NM OF TROUGH W OF 163E.
.24 HOUR FORECAST TROUGH MOVED N OF AREA.

.24 HOUR FORECAST NEW TROUGH FROM 11N165W TO 07N167W. E WINDS 20 TO
25 KT FROM 11N TO 15N BETWEEN 160W AND 168W.
.48 HOUR FORECAST TROUGH FROM 11N170W TO 07N174W. E WINDS 20 TO 25
KT AND SEAS 2.5 TO 3 M FROM 11N TO 15N BETWEEN 167W AND 178W.

.24 HOUR FORECAST NEW TROUGH FROM 13N144W TO 10N149W. E WINDS 20 TO
25 KT FROM 11N TO 16N BETWEEN 145W AND 150W.
.48 HOUR FORECAST TROUGH FROM 13N149W TO 10N152W. E WINDS 20 TO 25
KT AND SEAS 2.5 TO 3 M FROM 13N TO 17N BETWEEN 149W AND 156W.

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

.MONSOON TROUGH FROM 11N140W TO 09N150W THENCE ITCZ TO 09N165W TO
09N175W TO 07N170E TO 05N160E. SCATTERED MODERATE TSTMS WITHIN 240
NM S AND 150 NM N OF ITCZ W OF 175W. ISOLATED MODERATE TSTMS WITHIN
120 NM OF MONSOON TROUGH...AND WITHIN 180 NM OF ITCZ E OF 165W.

$$

.FORECASTER WROE. HONOLULU HI.