508
FZPS40 PHFO 221501
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC TUE APR 22 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 APR 22 2025.
24 HOUR FORECAST VALID 1200 UTC APR 23 2025.
48 HOUR FORECAST VALID 1200 UTC APR 24 2025.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 17S161W 1007 MB MOVING S SLOWLY. TROUGH 16S153W 18S157W
TO LOW TO 22S166W NEARLY STATIONARY. ASSOCIATED WINDS AND SEAS BELOW.
ISOLATED MODERATE TO LOCALLY STRONG TSTMS WITHIN 270 NM N AND 90 NM
S OF TROUGH...AND S OF 21S BETWEEN 163W AND 166W.
.24 HOUR FORECAST LOW NEAR 19S160W 1007 MB. TROUGH 19S154W TO LOW TO
14S161W 12S169W. SECOND TROUGH FROM LOW TO 25S166W. ASSOCIATED WINDS
AND SEAS BELOW.
.48 HOUR FORECAST LOW NEAR 20S156W 1007 MB. TROUGH 18S146W TO LOW
TO 14S163W 09S176W 04S170E. SECOND TROUGH FROM LOW TO 23S165W.
ASSOCIATED WINDS AND SEAS BELOW.

.TROUGH 19S179E 13S175E 14S168E 15S160E MOVING W SLOWLY. ISOLATED
MODERATE TO STRONG TSTMS WITHIN 210 NM S OF TROUGH W OF 174E...AND
WITHIN 360 NM N OF TROUGH W OF 170E.
.24 HOUR FORECAST LOW NEAR 15S160E 1009 MB. TROUGH 21S168E TO LOW.
.48 HOUR FORECAST LOW MOVED W OF AREA. TROUGH 21S164E TO 17S160E.

.TROUGH 25S125W 22S133W 18S136W 15S146W MOVING SW SLOWLY. ASSOCIATED
WINDS AND SEAS BELOW. ISOLATED MODERATE TSTMS WITHIN 300 NM S OF
TROUGH W OF 136W.
.24 HOUR FORECAST TROUGH 25S135W 17S139W. ASSOCIATED WINDS AND SEAS
BELOW.
.48 HOUR FORECAST TROUGH 25S141W 23S142W. ASSOCIATED WINDS AND SEAS
BELOW.

.TROUGH 04S141W 06S150W 04S174W 02S179E MOVING W SLOWLY. ISOLATED
MODERATE TSTMS WITHIN 240 NM S OF TROUGH...AND WITHIN 90 NM N
OF TROUGH.
.24 HOUR FORECAST TROUGH 08S152W 06S172W 04S179W.
.48 HOUR FORECAST TROUGH 08S149W 08S161W 08S171W.

.WINDS 20 TO 30 KT S OF LINE 25S131W 18S137W 17S152W 21S164W.
.24 HOUR FORECAST WINDS 20 TO 30 KT S OF LINE 25S138W 18S152W
23S162W.
.48 HOUR FORECAST WINDS 20 TO 30 KT FROM 23S TO 21S BETWEEN 150W AND
157W. WINDS 20 TO 25 KT FROM 24S TO 21S BETWEEN 167E AND 163E.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 12 FT S OF LINE 18S120W 17S160W 20S169W.
.24 HOUR FORECAST SEAS 8 TO 12 FT S OF LINE 20S120W 21S136W 17S150W
21S165W.
.48 HOUR FORECAST SEAS 8 TO 11 FT S OF LINE 11S120W 12S132W 21S138W
22S141W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 02S TO 05S BETWEEN 175E AND 164E.



$$

.FORECASTER TSAMOUS. HONOLULU HI.