High Seas Forecast
Issued by NWS

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FZPS40 PHFO 171543
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC TUE OCT 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 OCT 17 2017.
24 HOUR FORECAST VALID 1200 UTC OCT 18 2017.
48 HOUR FORECAST VALID 1200 UTC OCT 19 2017.

.WARNINGS.

...GALE WARNING...
.LOW DEVELOPING ALONG TROUGH. TROUGH FROM 09S164W TO 13S160W TO
16S153W MOVING SSW 15 KT. ASSOCIATED TSTMS INCLUDED BELOW.
.24 HOUR FORECAST LOW NEAR 21S163W 1008 MB. WINDS INCREASING
TO 30 TO 40 KT WITHIN 240 NM OF LOW CENTER NE QUADRANT. ADDITIONAL
WINDS INCLUDED BELOW.
.48 HOUR FORECAST LOW JUST S OF FORECAST AREA NEAR 28S156W.
WINDS 30 TO 40 KT OVER FORECAST WATERS WITHIN 300 NM OF CENTER
NE QUADRANT. ADDITIONAL WINDS AND ASSOCIATED SEAS INCLUDED BELOW.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 21S120W TO 17S127W TO 14S135W TO 14S146W
MOVING ENE 10 KT. ASSOCIATED WINDS INCLUDED BELOW.
.24 HOUR FORECAST FRONT FROM 17S120W TO 15S130W TO 12S143W.
ASSOCIATED WINDS INCLUDED BELOW.
.48 HOUR FORECAST FRONT FROM 15S120W TO 13S129W TO 11S141W.
ASSOCIATED WINDS INCLUDED BELOW.

.TROUGH FROM 16S175W TO 21S174W TO 25S171W. TROUGH MOVING E 10 KT
S OF 21S AND NEARLY STATIONARY N OF 21S. ASSOCIATED TSTMS INCLUDED
BELOW.
.24 HOUR FORECAST DEVELOPING COLD FRONT FROM 25S166W TO 19S171W TO
15S177W.
.48 HOUR FORECAST FRONT FROM 25S163W TO 20S167W TO 17S173W TO
14S179W.

.TROUGH FROM 05S169E TO 09S175E TO 11S179W. TROUGH MOVING SW 10 KT
W OF 175E AND NEARLY STATIONARY E OF 175E. MOVING SW 10 KT.
ASSOCIATED TSTMS INCLUDED BELOW.
.24 HOUR FORECAST TROUGH FROM 05S163E TO 10S171E TO 11S179W.
.48 HOUR FORECAST TROUGH FROM 05S163E TO 10S171E TO 14S179W.

.OTHERWISE WINDS SE TO E 20 TO 30 KT S OF 22S W OF 179E...AND ALSO
FROM  14S TO 24S BETWEEN 162W AND 140W.
.24 HOUR FORECAST...IN ADDITION TO GALE AREA DESCRIBED IN WARNING
SECTION ABOVE...WINDS SE TO E 20 TO 30 KT S OF A LINE FROM
13S160E TO 17S178E. ALSO WINDS E TO NE 20 TO KT S OF A LINE FROM
17S138W TO 15S146W TO 20S163W.
.48 HOUR FORECAST...IN ADDITION TO GALE AREA DESCRIBED IN WARNING
SECTION ABOVE...WINDS SE TO E 20 TO 30 KT S OF A LINE FROM
18S179E TO 13S168E TO 13S160E. WINDS E TO NE 20 TO 30 KT S OF A
LINE FROM 15S128W TO 15S145W TO 23S157W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 12 FT S OF A LINE FROM 20S120W TO 15S150W TO 19S162W.
ALSO SEAS 8 TO 10 FT S OF 22S W OF 175E.
.24 HOUR FORECAST SEAS 8 TO 12 FT S OF A LINE FROM 13S120W TO
16S150W TO 22S170W. ALSO SEAS 8 TO 11 FT S OF 17S W OF 179E.
.48 HOUR FORECAST SEAS 8 TO 15 FT S OF A LINE FROM 11S120W TO
15S140W TO 15S165W. ALSO SEAS 8 TO 11 FT S OF A LINE FROM 11S160E
TO 18S179E.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ISOLATED MODERATE TO STRONG TSTMS S OF 10S W OF 179E...AND ALSO
S OF 10S BETWEEN 176W AND 138W.

$$

.FORECASTER BEDAL. HONOLULU HI.



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