832
FZPS40 PHFO 210306
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC THU AUG 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

SOUTH PACIFIC EQUATOR TO 25S BETWEEN 120W AND 160E

SYNOPSIS VALID 0000 UTC AUG 21 2025.
24 HOUR FORECAST VALID 0000 UTC AUG 22 2025.
48 HOUR FORECAST VALID 0000 UTC AUG 23 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S158W TO TO 21S163W 17S169W THENCE TROUGH TO 14S174W TO 11S165E
TO 12S180E TO 09S160E MOVING E 10 KT. ISOLATED MODERATE TSTMS
WITHIN 210 NM OF TROUGH W OF 172E.
.24 HOUR FORECAST FRONT WEAKENED TO A TROUGH FROM 25S151W TO
20S157W TO 12S168W TO 05S174E.
.48 HOUR FORECAST TROUGH FROM 25S138W TO 17S151W TO 16S170W TO
08S173E TO 05S160E.

.TROUGH FROM 14S163W TO 09S170W TO 06S180W TO 06S176E MOVING SW
SLOWLY. ISOLATED MODERATE TSTMS WITHIN 180 NM OF TROUGH BETWEEN
173W AND 177E.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED ABOVE.

.TROUGH FROM 21S170E TO 20S160E MOVING E 10 KT. ISOLATED MODERATE
TSTMS WITHIN 90 NM OF TROUGH W OF 164E.
.24 HOUR FORECAST TROUGH FROM 21S176E TO 20S165E.
.48 HOUR FORECAST TROUGH FROM 25S171W TO 20S177W.

.TROUGH FROM 25S136W TO 24S143W TO 20S146W MOVING S SLOWLY.
.24 HOUR FORECAST TROUGH FROM 25S142W TO 21S145W.
.48 HOUR FORECAST TROUGH MOVED S OF AREA.

.SE WINDS 20 TO 30 KT BETWEEN TWO LINES FROM 15S175W TO 25S174E
AND FROM 07S178W TO 09S160E.
.24 HOUR FORECAST SE WINDS 20 TO 30 KT W OF A LINE FROM 09S174W TO
18S178W TO 25S170E.
.48 HOUR FORECAST SE WINDS 20 TO 25 KT W OF A LINE FROM 20S170W TO
08S173E.

.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 2.5 TO 3.5 M S OF A LINE FROM 25S170W TO 20S175W TO 07S177W
10S160E. SEAS 2 TO 3 M E OF 134W.
.24 HOUR FORECAST SEAS 2.5 TO 4 M S OF A LINE FROM 25S160W TO
05S180W TO 07S160E. SEAS 2.5 TO 3.5 M S OF 03S E OF 136W.
.48 HOUR FORECAST SEAS 2.5 TO 3.5 M FROM 17S TO 07S W OF 178E.
SEAS 2.5 TO 3 M ELSEWHERE S OF A LINE FROM 09S178W TO 03S171E TO
06S160E. SEAS 2.5 TO 3 M S OF 03S E OF 132W.

.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.


$$

.FORECASTER TSAMOUS. HONOLULU HI.