210
FZPS40 PHFO 191517
HSFSP
HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC SAT APR 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 19 2025.
24 HOUR FORECAST VALID 1200 UTC APR 20 2025.
48 HOUR FORECAST VALID 1200 UTC APR 21 2025.
.WARNINGS.
..GALE WARNING
.LOW NEAR 18S179W 1007 MB MOVING SE 15 KT. TROUGH 25S179E 22S179E
TO LOW TO 16S176W 12S172W MOVING SE SLOWLY. WINDS 20 TO 25 KT S
OF 17S BETWEEN 141W AND 178W. ISOLATED MODERATE TSTMS WITHIN 120
NM E OF TROUGH.
.24 HOUR FORECAST LOW NEAR 24S176W 1006 MB. TROUGH DESCRIBED
IMMEDIATELY BELOW MERGES WITH NEW FRONT FROM LOW TO 18S179E
13S172E 11S160E. WINDS 30 TO 40 KT S OF 23S BETWEEN 170W AND 175W.
WINDS 25 TO 35 KT S OF 23S BETWEEN 166W AND 173W. WINDS 20 TO 30
KT ELSEWHERE S OF 18S BETWEEN 136W AND 174W.
.48 HOUR FORECAST LOW MOVED S OF AREA. FRONT 25S171W 17S178W
14S169E 10S160E. WINDS 20 TO 30 KT S OF 19S BETWEEN 129W AND 167W.
.SYNOPSIS AND FORECAST.
.TROUGH 12S168E 11S160E NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH ABSORBED BY FRONT MENTIONED ABOVE.
.FRONT 25S135W 20S145W THENCE TROUGH 14S157W 08S167W. FRONT MOVING
NE SLOWLY AND TROUGH MOVING SW SLOWLY.
.24 HOUR FORECAST FRONT 25S128W 20S142W THENCE TROUGH 17S154W.
.48 HOUR FORECAST FRONT WEAKENED TO TROUGH 21S131W 20S145W
18S156W.
.SEAS 12 TO 13 FT S OF 18S BETWEEN 145W AND 166W. SEAS 8 TO 12 FT
ELSEWHERE S OF LINE 10S120W 03S124W 06S136W 18S141W 14S155W
15S169W 20S179W 25S178E 22S170E 23S160E.
.24 HOUR FORECAST SEAS 12 TO 15 FT S OF LINE 25S152W 22S141W
17S162W 22S174W 25S176W. SEAS 8 TO 12 FT ELSEWHERE S OF LINE
11S120W 11S128W 07S131W 08S137W 18S141W 13S153W 13S160W 21S175W
22S160E.
.48 HOUR FORECAST SEAS 12 TO 15 FT S OF LINE 25S135W 20S148W
19S162W 25S165W 23S168W 25S171W. SEAS 8 TO 12 FT ELSEWHERE S OF
LINE 09S120W 11S132W 15S136W 12S165W 21S175W 17S174E 25S171E.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS.
.ISOLATED MODERATE TSTMS FROM 10S TO 03S BETWEEN 127W AND
143W...AND N OF 09S W OF 167E.
.FORECASTER PIERCE. HONOLULU HI.
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