000
FZPS40 PHFO 201535
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC SUN AUG 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 AUG 20 2017.
24 HOUR FORECAST VALID 1200 UTC AUG 21 2017.
48 HOUR FORECAST VALID 1200 UTC AUG 22 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 10S171E 1009 MB NEARLY STATIONARY. TROUGHS FROM LOW TO
13S178E TO 11S175W AND FROM LOW TO 08S167E 06S160E. ISOLATED
MODERATE TO STRONG TSTMS WITHIN 420 NM EITHER SIDE OF TROUGH AXIS.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 06S160E TO 15S178E.
.48 HOUR FORECAST TROUGH FROM 06S160E TO 15S170E.

.COLD FRONT FROM 25S179W TO 18S173E MOVING E 15 KT. WINDS SW TO NW
20 TO 25 KT S OF 20S W OF 173W. ASSOCIATED SEAS INCLUDED BELOW.
.24 HOUR FORECAST FRONT FROM 25S168W TO 18S177W. ASSOCIATED WINDS
DIMINISHED TO 20 KT OR LESS. ASSOCIATED SEAS INCLUDED BELOW.
.48 HOUR FORECAST FRONT FROM 25S162W TO 18S173W.

.TROUGH FROM 08S140W TO 13S130W TO 19S121 MOVING NW 10 KT.
.24 HOUR FORECAST TROUGH FROM 05S143W TO 11S139W TO 18S130W.
.48 HOUR FORECAST TROUGH FROM 05S157W TO 10S144W TO 17S136W TO
25S129W.

.RIDGE FROM 25S163W TO 18S177W.
.24 HOUR FORECAST RIDGE FROM 25S156W TO 18S165W.
.48 HOUR FORECAST RIDGE FROM 25S147W TO 20S159W.

.OTHERWISE WINDS E TO SE 20 TO 25 KT FROM 08S TO 18S BETWEEN
173W AND 143W.
.24 HOUR FORECAST WINDS E TO SE 20 TO 25 KT FROM 12S TO 22S BETWEEN
164W AND 137W.
.48 HOUR FORECAST WINDS E TO SE 20 TO 25 KT FROM 12S TO 20S BETWEEN
155W AND 142W...AND ALSO S OF 23S E OF 130W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 15 FT WITHIN A POLYGON BOUND BY 16S160E 18S163E 22S166E
19S172E 23S176W 25S176W 25S160E 16S160E. SEAS 8 TO 10 FT WITHIN
300 NM EITHER SIDE OF A LINE FROM 07S158W TO 17S171W...AND ALSO SE
OF A LINE FROM 17S120W 25S140W.
.24 HOUR FORECAST SEAS 8 TO 13 FT WITHIN A POLYGON BOUND BY 09S160E
12S167E 20S164E 22S167E 17S173E 19S175W 25S168W 25S160E 09S160E.
SEAS 8 TO 10 FT S OF 21S E OF 138W.
.48 HOUR FORECAST SEAS 8 TO 11 FT WITHIN A POLYGON BOUND BY 13S160E
16S164E 21S165E 14S171E 14S177E 21S170W 25S170W 25S169E 20S160E
13S160E...AND ALSO SE OF A LINE FROM 15S120W TO 25S136W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.OTHERWISE ISOLATED MODERATE TSTMS FROM 10S TO 16S BETWEEN 173W AND
163W.


$$

.FORECASTER BEDAL. HONOLULU HI.