High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 170326
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0530 UTC SUN DEC 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC DEC 17 2017.
24 HOUR FORECAST VALID 0000 UTC DEC 18 2017.
48 HOUR FORECAST VALID 0000 UTC DEC 19 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 14S177W 1004 MB MOVING E 10 KT. TROUGH FROM 25S151W TO
17S158W TO 14S167W TO LOW TO 13S166E. SCATTERED MODERATE TSTMS
WITHIN 420 NM N AND E OF LOW AND TROUGHS. ISOLATED MODERATE TSTMS
WITHIN 120 NM S OF TROUGH.
.24 HOUR FORECAST LOW 15S172W 1001 MB. TROUGH FROM 23S151W TO
17S158W TO 17S165W TO LOW TO 12S179E TO 12S166E. WINDS 20 TO 30 KT
AND SEAS 8 TO 9 FT WITHIN 300 NM NE SEMICIRCLE OF LOW...AND
WITHIN 120 NM SW QUADRANT OF LOW.
.48 HOUR FORECAST LOW 19S167W 1002 MB. DEVELOPING FRONT FROM
24S158W TO 23S163W TO LOW TO 11S175W TO 12S175E. WINDS 20 TO 30 KT
AND SEAS 8 TO 12 FT WITHIN 240 NM NE SEMICIRCLE OF LOW...AND
WITHIN 120 NM N AND NE OF FRONT E OF 173W.

.TROUGH FROM 24S120W TO 21S130W TO 21S138W NEARLY STATIONARY.
ISOLATED TSTMS WITHIN 180 NM N OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 24S120W TO 21S129W TO 22S140W.
.48 HOUR FORECAST TROUGH FROM 25S120W TO 21S129W TO 22S138W.

.TROUGH FROM 16S136W TO 11S139W MOVING SW SLOWLY.
.24 HOUR FORECAST TROUGH FROM 18S137W TO 15S140W.
.48 HOUR FORECAST TROUGH FROM 18S140W TO 11S142W.

.E TO SE WINDS 20 TO 25 KT FROM 18S TO 22S W OF 166E.
.24 HOUR FORECAST WINDS DIMINISHED TO 20 KT OR LESS.

.RIDGE FROM 20S120W TO 17S129W MOVING NEARLY STATIONARY.

.RIDGE FROM 10S150W TO 04S170W TO 04S175E TO 06S161E NEARLY
STATIONARY.

.SEAS 8 TO 10 FT S OF 23S BETWEEN 162W AND 172W.
.24 HOUR FORECAST SEAS DIMINISHED TO 8 FT OR LESS.

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

$$

.FORECASTER BRAVENDER. HONOLULU HI.



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