985
FZPS40 PHFO 180348
HSFSP
HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC THU SEP 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC SEP 18 2025.
24 HOUR FORECAST VALID 0000 UTC SEP 19 2025.
48 HOUR FORECAST VALID 0000 UTC SEP 20 2025.
.WARNINGS.
..GALE WARNING
.TROUGH 21S160W 18S164W 12S168W 03S178W MOVING ESE SLOWLY. WINDS
30 TO 40 KT IN AREA BOUNDED BY 21S164W 13S177W 13S170W 18S161W
21S164W. WINDS 20 TO 30 KT ELSEWHERE IN AREA BOUNDED BY 25S172W
19S160E 04S160E 11S177W 13S166W 21S146W 25S150W. ISOLATED MODERATE
TSTMS FROM 23S TO 21S BETWEEN 169W AND 167W... AND WITHIN 210 NM
OF TROUGH.
.24 HOUR FORECAST NEW LOW NEAR 18S162W 1009 MB. TROUGH FROM
24S160W TO LOW TO 11S165W TO 04S177W. WINDS 30 TO 40 KT S OF LINE
25S164W 20S165W 20S155W 22S153W 25S155W. WINDS 20 TO 30 KT
ELSEWHERE S OF LINE 25S168W 19S168W 14S158W 11S137W 25S140W.
.48 HOUR FORECAST LOW NEAR 24S159W 1007 MB. TROUGH FROM 25S159W
TO LOW TO 16S161W TO 10S167W TO 05S177W. WINDS 30 TO 35 KT S OF
24S BETWEEN 158W AND 152W. WINDS 20 TO 30 KT ELSEWHERE S OF LINE
25S167W 20S164W 20S153W 14S150W 19S125W 24S120W.
.SYNOPSIS AND FORECAST.
.FRONT 25S131W 22S138W THENCE TROUGH 18S149W 17S156W. FRONT
MOVING NE 10 KT AND TROUGH NEARLY STATIONARY.
.24 HOUR FORECAST FRONT 25S125W 22S133W 21S136W. TROUGH
DISSIPATED.
.48 HOUR FORECAST FRONT 21S120W 18S126W.
.TROUGH 07S164E 03S160E MOVING SW SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 240 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 10S176E 06S168E 04S160E. WINDS 20 TO 25
KT FROM 20S TO 08S W OF 179E.
.48 HOUR FORECAST TROUGH 09S172E 04S160E. WINDS 20 TO 25 KT FROM
20S TO 10S W OF 179E.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 2.5 TO 4.5 M IN AREA BOUNDED BY 25S171W 17S160E 05S160E
14S168W 08S161W 09S146W 18S149W 22S138W 25S134W.
.24 HOUR FORECAST SEAS 4 TO 5 M S OF LINE 25S160W 20S167W 18S162W
22S152W 25S154W. SEAS 2.5 TO 4 M ELSEWHERE S OF LINE 25S173W
18S168E 07S166E 10S165E 25S124W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M S OF LINE 25S169W 18S174W
14S179E 19S144W 19S127W 23S120W. SEAS 2.5 TO 3 M IN AREA BOUNDED
BY 21S168E 13S170E 13S162E 11S162E 10S177E 21S169E 21S168E.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.ISOLATED MODERATE TSTMS FROM 17S TO 15S BETWEEN 174W AND 171W.
.FORECASTER TROTTER. HONOLULU HI.
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