405
FZPS40 PHFO 201043
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1130 UTC SUN APR 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC APR 20 2025.
24 HOUR FORECAST VALID 0600 UTC APR 21 2025.
48 HOUR FORECAST VALID 0600 UTC APR 22 2025.

.WARNINGS.

...GALE WARNING...
.LOW NEAR 23S176W 1005 MB MOVING SSE 15 KT. TROUGH 25S177W TO LOW TO
20S176W 12S179W MOVING SE SLOWLY. WINDS 30 TO 35 KT S OF 22S
BETWEEN 169W AND 175W. WINDS 20 TO 30 KT ELSEWHERE S OF 17S
BETWEEN 137W AND 177W. SCATTERED MODERATE TSTMS S OF 13S BETWEEN
168W AND TROUGH.
.24 HOUR FORECAST LOW MOVED S OF AREA. TROUGH 25S172W 22S168W
17S165W. WINDS 20 TO 30 KT S OF LINE 25S128W 17S146W 18S165W
25S170W.
.48 HOUR FORECAST TROUGH 25S171W 21S166W 18S163W. WINDS 20 TO 30
KT S OF 19S BETWEEN 139W AND 170W. WINDS 20 TO 25 KT S OF LINE
25S131W 18S146W 19S163W 25S168W.

.SYNOPSIS AND FORECAST.

.TROUGH 12S171E 11S160E MOVING S SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 120 NM OF TROUGH.
.24 HOUR TROUGH 14S169E 10S160E.
.48 HOUR TROUGH 16S173E 16S160E.

.FRONT 25S131W 21S141W THENCE TROUGH 16S158W 10S165W. FRONT
MOVING NE SLOWLY AND TROUGH MOVING NEARLY STATIONARY. ISOLATED
MODERATE TSTMS WITHIN 180 NM OF TROUGH N OF 20S.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH 25S126W 20S137W
17S165W.
.48 HOUR FORECAST TROUGH 25S130W 18S139W

.SEAS 12 TO 17 FT S OF LINE 25S152W 22S141W 17S156W 17S162W
25S177W. SEAS 8 TO 12 FT ELSEWHERE S OF LINE 10S120W 10S128W
05S124W 08S137W 18S141W 12S161W 20S175W 22S160E.
.24 HOUR FORECAST SEAS 12 TO 16 FT S OF LINE 25S136W 21S140W
18S163W 25S172W. SEAS 8 TO 12 FT ELSEWHERE S OF LINE 09S120W
10S137W 19S141W 14S158W 10S158W 21S175W 18S172E 25S170E.
.48 HOUR FORECAST SEAS 12 TO 14 FT S OF LINE 25S137W 24S132W
20S152W 22S165W 25S164W. SEAS 8 TO 12 FT ELSEWHERE S OF LINE
07S120W 13S135W 19S136W 15S165W 21S179E 25S176E.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS.

.ISOLATED MODERATE TSTMS FROM 14S TO 08S BETWEEN 149W AND
154W...AND FROM 06S TO 02S BETWEEN 124W AND 143W.

$$

.FORECASTER PIERCE. HONOLULU HI.