High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 280338
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC FRI APR 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC APR 28 2017.
24 HOUR FORECAST VALID 0000 UTC APR 29 2017.
48 HOUR FORECAST VALID 0000 UTC APR 30 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 09S162E 1010 MB NEARLY STATIONARY. TROUGH FROM 09S160E THROUGH
LOW TO 09S177E NEARLY STATIONARY. SCATTERED MODERATE TSTMS WITHIN
270 NM N OF TROUGH W OF 179E...AND FROM 01S TO 06S BETWEEN
178E AND 172E.
.24 HOUR FORECAST LOW 11S163E 1009 MB. TROUGH FROM 10S160E THROUGH
LOW TO 11S176E TO 12S180W TO 15S171W.
.48 HOUR FORECAST LOW 10S164E 1008 MB. TROUGH FROM 09S160E THROUGH
LOW TO 14S180W TO 14S170W TO 16S167W.

.FRONT FROM 25S161E TO 23S160E MOVING NE 10 KT. WINDS 20 TO 25 KT
S OF 23S W OF 163E.
.24 HOUR FORECAST FRONT FROM 25S167E TO 19S160E. ASSOCIATED WINDS
DIMINISHED TO 20 KT OR LESS.
.48 HOUR FORECAST FRONT FROM 25S178E TO 20S170E TO 15S165E.

.TROUGH FROM 11S179E TO 20S168W TO 22S164W MOVING NE SLOWLY.
SCATTERED MODERATE TSTMS FROM 15S TO 22S BETWEEN 162W AND
168W. ISOLATED MODERATE TSTMS FROM 10S TO 14S BETWEEN 167W AND
175W.
.24 HOUR FORECAST TROUGH MERGED WITH FRONT DESCRIBED BELOW.

.COLD FRONT FRONT FROM 25S165W TO 21S169W TO 18S178W MOVING E 15 KT.
.24 HOUR FORECAST COLD FRONT FROM 25S160W TO 20S165W THENCE TROUGH
TO 16S170W.
.48 HOUR FORECAST COLD FRONT FROM 25S154W TO 21S156W THENCE TROUGH
TO 16S167W.

.TROUGH FROM 02S169W TO 06S156W TO 07S138W MOVING WSW 10 KT.
NUMEROUS MODERATE TO STRONG TSTMS FROM 06S TO 12S BETWEEN 135W
AND 147W. SCATTERED MODERATE TSTMS WITHIN 210 NM N OF TROUGH
W OF 150W. ISOLATED MODERATE TSTMS FROM 02S TO 07S BETWEEN
132W AND 144W.
.24 HOUR FORECAST TROUGH FROM 06S173W TO 08S153W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 25S124W TO 21S126W NEARLY STATIONARY. ISOLATED MODERATE
TSTMS WITHIN 60 NM E OF TROUGH S OF 23S. WEAK COLD FRONT FROM
25S131W TO 24S143W MOVING NE 20 KT.
.24 HOUR FORECAST FRONT FROM 22S120W TO 17S124W.
TROUGH MERGED WITH FRONT.
.48 HOUR FORECAST FRONT MOVED E OF FORECAST AREA.

.RIDGE FROM 25S152W TO 15S160W TO 10S166W TO 04S175E TO 02S160E
NEARLY STATIONARY.

.RIDGE FROM 25S169E TO 21S160E MOVING E 20 KT.

.SEAS 8 TO 10 FT SE OF A LINE FROM 03S120W TO 12S125W TO 20S130W
TO 20S154W TO 20S170W TO 25S172W.
SEAS 8 TO 10 FT S OF A LINE FROM 25S171W TO 18S170W TO 18S160W TO
25S148W.
.24 HOUR FORECAST SEAS 8 TO 12 FT SE OF A LINE FROM 15S120W TO
17S130W TO 20S140W TO 25S152W.
.48 HOUR FORECAST SEAS 8 TO 11 FT SE OF A LINE FROM 07S120W TO
10S128W TO 25S134W.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS.

.ISOLATED MODERATE TSTMS FROM 14S TO 17S BETWEEN 171E AND 164E.

$$

.FORECASTER BIRCHARD. HONOLULU HI.


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