040
FZPS40 PHFO 172319
HSFSP
HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC WED SEP 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC SEP 17 2025.
24 HOUR FORECAST VALID 1800 UTC SEP 18 2025.
48 HOUR FORECAST VALID 1800 UTC SEP 19 2025.
.WARNINGS.
..GALE WARNING
.TROUGH 22S167W 14S173W 07S176E MOVING ESE 10 KT. WINDS 30 TO 40
KT IN AREA BOUNDED BY 20S164W 14S174W 12S171W 17S165W 19S167W
20S164W. WINDS 20 TO 30 KT ELSEWHERE S OF LINE 25S174W 16S160E
06S160E 09S178E 16S167W 18S153W 25S163W. ISOLATED MODERATE TSTMS
WITHIN 180 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 21S161W 13S165W 04S177W. WINDS 30 TO 40
KT IN AREA BOUNDED BY 24S153W 24S163W 18S163W 22S152W 24S153W.
WINDS 20 TO 30 KT ELSEWHERE S OF LINE 25S168W 17S175W 20S167W
16S164W 10S152W 20S145W 25S137W.
.48 HOUR FORECAST NEW LOW NEAR 23S159W 1008 MB. TROUGH FROM
25S159W TO LOW TO 14S162W TO 08S168W TO 03S178E. WINDS 30 TO 35 KT
S OF 24S BETWEEN 158W AND 153W. WINDS 20 TO 30 KT ELSEWHERE S OF
18S BETWEEN 166W AND 128W.
.SYNOPSIS AND FORECAST.
.FRONT 25S133W 23S138W THENCE TROUGH 20S146W 17S155W. FRONT
MOVING E 10 KT AND TROUGH NEARLY STATIONARY.
.24 HOUR FORECAST FRONT 25S127W 23S131W. TROUGH DISSIPATED.
.48 HOUR FORECAST FRONT 22S120W 20S125W.
.24 HOUR FORECAST NEW TROUGH 10S174E 05S167E 04S160E. WINDS 20 TO
25 KT FROM 18S TO 10S BETWEEN 166E AND 175W.
.48 HOUR FORECAST TROUGH 10S172E 04S160E. WINDS 20 TO 25 KT FROM
21S TO 09S BETWEEN 163E AND 174W.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 2.5 TO 4.5 M IN AREA BOUNDED BY 25S170W 22S173E 13S167E
17S164E 17S160E 06S160E 05S166E 14S169W 09S164W 10S154W 25S137W.
.24 HOUR FORECAST SEAS 4 TO 5 M S OF LINE 25S162W 19S168W 15S164W
19S160W 21S156W 25S158W. SEAS 2.5 TO 4 M ELSEWHERE S OF LINE
25S172W 18S169E 13S166E 13S162E 07S161E 10S178W 09S168W 13S162W
05S150W 17S151W 25S129W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M S OF LINE 25S170W 19S178W
14S179W 19S144W 20S131W 23S120W. SEAS 2.5 TO 3 M IN AREA BOUNDED
BY 21S169E 13S167E 13S163E 11S162E 09S166E 10S179E 19S172E
21S169E.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
ISOLATED MODERATE TSTMS FROM 10S TO 03S W OF 173E
AND FROM 11S
TO 08S BETWEEN 165W AND 161W.
.FORECASTER TROTTER. HONOLULU HI.
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