406
FZPS40 PHFO 181520
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC MON AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC AUG 18 2025.
24 HOUR FORECAST VALID 1200 UTC AUG 19 2025.
48 HOUR FORECAST VALID 1200 UTC AUG 20 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 25S166W 20S170W 15S178W MOVING SE 10 SLOWLY.
.24 HOUR FORECAST FRONT 25S163W 15S180W.
.48 HOUR FORECAST FRONT WEAKENED TO TROUGH 25S162W 15S173W.

.FRONT 25S130W 18S140W 12S154W 11S157W NEARLY STATIONARY.
.24 HOURFORECAST FRONT WEAKENED TO TROUGH 25S127W 17S140W 14S156W.
.48 HOUR FORECAST TROUGH 25S132W 15S143W 13S162W.

.FRONT 25S136W 22S140W MOVING SE SLOWLY.
.24 HOUR FORECAST FRONT DISSIPATED.

.TROUGH 15S168E 10S160E MOVING W 10 KT. ISOLATED MODERATE TSTMS WITHIN
90 NM S OF TROUGH E OF 168E... AND WITHIN 60 NM OF TROUGH W OF 161E.
.24 HOUR FORECAST TROUGH 16S166E 12S160E. WINDS 20 TO 25 KT FROM 22S
TO 18S BETWEEN 163E AND 170E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.

.24 HOUR FORECAST NEW TROUGH 11S150W 04S162W.
.48 HOUR FORECAST TROUGH 11S150W 04S155W.

.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 21S TO 10S W OF 180W.

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

.SEAS 2.5 TO 3 M S OF LINE 10S160W 20S135W 10S120W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M S OF LINE 12S155W 20S135W 07S130W
05S120W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M S OF LINE 20S150W 20S140W 05S130W
04S120W... AND FROM 15S TO 10S BETWEEN 168E AND 180W.

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

.ISOLATED MODERATE TSTMS FROM 13S TO 11S BETWEEN 178W AND 165W...
AND N OF 07S W OF 168E.

$$

.FORECASTER SHIGESATO. HONOLULU HI.