476
FZPS40 PHFO 200317
HSFSP

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

SOUTH PACIFIC EQUATOR TO 25S BETWEEN 120W 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.

.FRONT FROM 25S138W TO 21S142W TO 16S148W THENCE TROUGH TO 12S159W
TO 07S170W. FRONT NEARLY STATIONARY. TROUGH MOVING WSW SLOWLY.
ISOLATED MODERATE TSTMS WITHIN 90 NM OF LINE FROM 25S133W TO
20S137W...WITHIN 60 NM OF TROUGH W OF 159W...AND WITHIN 60 NM OF A
LINE FROM 07S160W TO 05S177W.
.24 HOUR FORECAST FRONT DISSIPATED. TROUGH FROM 25S135W TO 22S145W
TO 12S163W.
.48 HOUR FORECAST TROUGH FROM 25S145W TO 20S146W TO 17S160W.

.FRONT FROM 25S163W TO 20S168W TO 17S176W MOVING E SLOWLY.
.24 HOUR FORECAST FRONT FROM 25S159W TO 18S169W.
.48 HOUR FORECAST FRONT MOVED S OF AREA. TROUGH FROM 25S155W TO
21S163W.

.SE WINDS 20 TO 30 KT IN AREA BOUNDED BY 06S170W 25S170E 25S160E
08S160E 06S170W. SE WINDS 20 TO 25 KT E OF A LINE FROM 20S120W TO
10S130W TO 00S123W.
.24 HOUR FORECAST SE WINDS 20 TO 30 KT IN AREA BOUNDED BY 06S175E
10S175W 25S175E 25S160E 12S160E 06S175E. SE WINDS 20 TO 25 KT FROM
08S TO 03S BETWEEN 125W AND 152W.
.48 HOUR FORECAST SE WINDS 20 TO 25 KT IN AREA BOUNDED BY 07S170E
11S172W 25S175E 25S160E 10S160E 07S170E. SE WINDS 20 TO 25 KT N OF
06S BETWEEN 140W AND 160W.

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

.SEAS 2.5 TO 3.5 M S OF A LINE FROM 03S120W TO 15S135W TO
20S152W...AND FROM 21S TO 17S W OF 170E.
.24 HOUR FORECAST SEAS 2.5 TO 4.5 M IN AREA BOUNDED BY 06S175W
15S175W 18S175E 25S170W 25S160E 13S160E 06S175W. SEAS 2.5 TO 3.5 M
S OF 03S E OF 136W. SEAS 2.5 TO 3 M S OF 22S BETWEEN 136W AND
150W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M S OF A LINE FROM 25S165W TO
05S175E TO 09S160E. SEAS 2.5 TO 3.5 M E OF 138W. SEAS 2.5 TO 3 M N
OF 07S BETWEEN 138W AND 155W.

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

.SCATTERED MODERATE TSTMS FROM 13S TO 08S BETWEEN 179E TO 172E.
ISOLATED MODERATE TSTMS W OF A LINE FROM 13S168E TO 04S160E.

$$

.FORECASTER WROE. HONOLULU HI.