452
FZPS40 PHFO 181027
HSFSP
HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1130 UTC FRI APR 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC APR 18 2025.
24 HOUR FORECAST VALID 0600 UTC APR 19 2025.
48 HOUR FORECAST VALID 0600 UTC APR 20 2025.
.WARNINGS.
..GALE WARNING
.TROUGH 25S178E 20S176E 11S160E MOVING NE SLOWLY. WINDS 20 TO 25
KT S OF LINE 25S154W 19S168W 25S174W...AND S OF LINE 25S177W
23S175W 19S177W 25S179E. SCATTERED MODERATE TSTMS WITHIN 150 NM
OF TROUGH.
.24 HOUR FORECAST NEW LOW NEAR 19S179W 1006 MB. TROUGH 25S179E TO
LOW TO 10S160E. WINDS 20 TO 30 KT S OF 16S BETWEEN 143W AND 179W.
.48 HOUR FORECAST LOW NEAR 23S176W 1005 MB. TROUGH 25S177E TO LOW
TO 15S174E 11S160E. WINDS 30 TO 40 KT S OF 22S BETWEEN 169W AND
174W. WINDS 20 TO 30 KT S OF 17S BETWEEN 139W AND 176W.
.SYNOPSIS AND FORECAST.
.TROUGH 10S172E 04S163E. ISOLATED MODERATE TSTMS WITHIN 150 NM OF
TROUGH.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED IMMEDIATELY
ABOVE.
.FRONT 25S140W 20S147W THENCE TROUGH 15S156W 10S166W
NEARLY STATIONARY. SCATTERED MODERATE TSTMS WITHIN 180 NM OF
TROUGH.
.24 HOUR FORECAST FRONT 25S137W 19S143W THENCE TROUGH 14S161W.
.48 HOUR FORECAST FRONT 25S133W 21S139W THENCE TROUGH 17S165W.
.SEAS 8 TO 11 FT S OF LINE 19S160E 21S178W 18S163W 19S136W 06S126W
04S120W.
.24 HOUR FORECAST SEAS 12 TO 13 FT S OF LINE 24S145W 20S151W
21S164W 25S160W. SEAS 8 TO 12 FT ELSEWHERE 21S160E 24S177E 14S167W
19S136W 09S136W 04S120W.
.48 HOUR FORECAST SEAS 12 TO 14 FT S OF LINE 25S163W 22S143W
18S159W 21S172W 25S177W. SEAS 8 TO 12 FT ELSEWHERE S OF LINE
22S160E 21S176W 13S153W 19S141W 09S134W 06S126W 10S127W 09S120W.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS.
.ITCZ 04S126W 04S138W 07S144W. SCATTERED MODERATE TSTMS WITHIN 150
NM N OF ITCZ...AND 270 NM S OF ITCZ.
.FORECASTER PIERCE. HONOLULU HI.
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