High Seas Forecast
Issued by NWS

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FZPS40 PHFO 201528
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC WED SEP 20 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SEP 20 2017.
24 HOUR FORECAST VALID 1200 UTC SEP 21 2017.
48 HOUR FORECAST VALID 1200 UTC SEP 22 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S159W TO 20S161W TO 16S165W TO 11S174W MOVING E 20 KT
S OF 16S...AND NEARLY STATIONARY ELSEWHERE. ISOLATED MODERATE TSTMS
WITHIN 240 NM E OF FRONT S OF 22S.
.24 HOUR FORECAST FRONT FROM 25S151W TO 20S155W TO 14S170W. NW TO
N WINDS 20 TO 25 KT WITHIN 150 NM E OF FRONT S OF 23S.
.48 HOUR FORECAST FRONT FROM 25S143W TO 20S151W TO 15S165W. WINDS
DIMINISHED TO 20 KT OR LESS.

.FRONT FROM 25S126W TO 21S139W TO 22S146W TO 19S152W NEARLY
STATIONARY. ISOLATED MODERATE TSTMS S OF FRONT...AND WITHIN 90 NM
N OF FRONT.
.24 HOUR FORECAST FRONT FROM 25S121W TO 22S130W TO 23S138W.
.48 HOUR FORECAST FRONT FROM 24S120W TO 22S129W.

.COLD FRONT SW OF FORECAST WATERS MOVING NE 10 KT.
.24 HOUR FORECAST FRONT FROM 25S165E TO 23S160E.
.48 HOUR FORECAST FRONT FROM 25S175E TO 22S163E.

.TROUGH FROM 11S174W TO 08S178E TO 06S160E MOVING N SLOWLY W OF
175E...AND MOVING S SLOWLY E OF 176E. ISOLATED MODERATE TSTMS
WITHIN 300 NM S OF TROUGH W OF 176E...AND WITHIN 90 NM S OF TROUGH
E OF 176E.
.24 HOUR FORECAST TROUGH FROM 12S175W TO 10S177E TO 04S170E.
.48 HOUR FORECAST TROUGH FROM 14S175W TO 10S173E TO 07S163E.

.HIGH 24S165E 1019 MB MOVING E 30 KT. RIDGE FROM 23S160E TO HIGH
TO 23S177E TO 17S166W NEARLY STATIONARY.
.24 HOUR FORECAST HIGH 24S180E 1017 MB.
.48 HOUR FORECAST HIGH 22S168W 1017 MB.

.RIDGE FROM 21S120W TO 19S140W MOVING NE SLOWLY.

.OTHERWISE...WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 8 TO 10 FT S OF A LINE FROM 25S167W TO 18S177W TO 16S172E.
.24 HOUR FORECAST SEAS 8 TO 10 FT S OF A LINE FROM 25S157W TO
19S168W.
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 22S BETWEEN 149W AND 159W.

.OTHERWISE...SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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