308
FZPS40 PHFO 182218
HSFSP
HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC FRI JUL 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC JUL 18 2025.
24 HOUR FORECAST VALID 1800 UTC JUL 19 2025.
48 HOUR FORECAST VALID 1800 UTC JUL 20 2025.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.FRONT 25S170W 23S174W 21S180E 21S173E MOVING E 15 KT.
.24 HOUR FORECAST FRONT 25S162W 21S167W 20S171W 18S176W.
.48 HOUR FORECAST FRONT WEAKENED TO A TROUGH 25S145W 25S160W
21S168W.
.TROUGH 25S127W 20S129W 18S132W 18S139W 16S147W 14S152W NEARLY
STATIONARY.
.24 HOUR FORECAST TROUGH 25S123W 20S127W 18S128W 17S132W.
.48 HOUR FORECAST TROUGH 23S120W 19S127W.
.TROUGH 06S160E 09S170E 12S175E 12S180E 16S163W MOVING W 10 KT E OF
165E AND NEARLY STATIONARY AND DISSIPATING ELSEWHERE. ISOLATED
MODERATE TSTMS WITHIN 270 NM N OF TROUGH...AND WITHIN 180 NM S OF
TROUGH W OF 169E.
.24 HOUR FORECAST TROUGH 19S161W 11S176W.
.48 HOUR FORECAST TROUGH 19S162W 14S173W.
.TROUGH 13S160E 16S164W MOVING W SLOWLY. ISOLATED MODERATE TSTMS
WITHIN 90 NM OF TROUGH.
.24 HOUR FORECAST TROUGH MOVED W OF AREA.
.24 HOUR FORECAST NEW FRONT 25S166E 20S163E 17S160E.
.48 HOUR FORECAST FRONT 25S172E 19S166E THENCE TROUGH 12S160E.
.24 HOUR FORECAST WINDS 20 TO 25 KT N OF 10S BETWEEN 126W AND 160W.
.48 HOUR FORECAST WINDS 20 TO 25 KT N OF 10S BETWEEN 140W AND 171W.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.FORECASTER TSAMOUS. HONOLULU HI.
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