High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 170318
HSFSP

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

...GALE WARNING...
.LOW 21S157W 1006 MB MOVING NE SLOWLY. TROUGH FROM LOW TO 15S175W
TO 14S163E. WINDS 20 TO 25 KT WITHIN 480 NM SE QUADRANT OF LOW...
AND WITHIN 240 NM NE OF LOW AND TROUGH E OF 170W. SCATTERED
MODERATE TSTMS WITHIN 360 NM NE AND E OF LOW AND TROUGH E OF 179W.
ISOLATED MODERATE TSTMS WITHIN 300 NM OF TROUGH W OF 179W.
.24 HOUR FORECAST LOW 20S154W 1004 MB. TROUGH FROM LOW TO 14S160W
TO 12S174W. WINDS 30 TO 35 KT WITHIN 180 NM E SEMICIRCLE OF LOW.
WINDS 20 TO 30 KT ELSEWHERE WITHIN 360 NM NE AND E OF LOW AND
TROUGH E OF 168W...AND WITHIN 480 NM S SEMICIRCLE OF LOW.
.48 HOUR FORECAST LOW 21S151W 998 MB. SECOND LOW DEVELOPING NEAR
16S156W 1001 MB. TROUGH FROM FIRST LOW TO SECOND LOW TO 11S167W.
WINDS 30 TO 45 KT WITHIN 300 NM NE AND E OF LOWS AND TROUGH E OF
157W. WINDS 20 TO 30 KT ELSEWHERE WITHIN 540 NM NE AND E OF LOWS
AND TROUGH...AND WITHIN 360 NM S SEMICIRCLE OF FIRST LOW.

.SYNOPSIS AND FORECAST.

.LOW 25S172W 1005 MB NEARLY STATIONARY.
.24 HOUR FORECAST 25S172W 1005 MB. TROUGH FROM LOW TO 16S178E TO
11S160E.
.48 HOUR FORECAST 25S171W 1004 MB. TROUGH FROM LOW TO 16S177W TO
12S169E TO 14S160E.

.LOW 20S128W 1008 MB MOVING SW SLOWLY. TROUGH FROM 21S120W TO LOW
TO 17S132W TO 14S146W. SCATTERED MODERATE TSTMS WITHIN 240 NM NE
OF LOW AND TROUGHS E OF 130W. ISOLATED TSTMS WITHIN 240 NM OF
TROUGH W OF 130W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 22S120W TO 17S146W.
.48 HOUR FORECAST WEAKENING TROUGH FROM 21S120W TO 22S135W.

.RIDGE FROM 16S120W TO 11S134W MOVING S SLOWLY.

.RIDGE FROM 11S149W TO 05S167W TO 03S176E NEARLY STATIONARY.

.RIDGE FROM 08S169E TO 04S160E MOVING N SLOWLY.

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

.SEAS 8 TO 10 FT S OF A LINE FROM 22S153W TO 25S160W.
.24 HOUR FORECAST SEAS 8 TO 10 FT S OF A LINE FROM 15S152W TO
23S161W...AND WITHIN 180 NM S OF A LINE FROM 15S152W TO 10S164W.
.48 HOUR FORECAST SEAS 12 TO 18 WITHIN 240 NM SW OF A LINE FROM
20S147W TO 10S156W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM
15S146W TO 08S158W TO 08S162W.

.OTHERWISE SEAS 8 FT OR LESS OVER REMAINDER OF AREA.

.ISOLATED MODERATE TSTMS N OF 04S W OF 173E.

$$

.FORECASTER BRAVENDER. HONOLULU HI.


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