High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 182337
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC WED JAN 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC JAN 18 2017.
24 HOUR FORECAST VALID 1800 UTC JAN 19 2017.
48 HOUR FORECAST VALID 1800 UTC JAN 20 2017.

.WARNINGS.

...GALE WARNING...
.LOW 20S155W 1000 MB MOVING SE SLOWLY. TROUGH FROM 25S144W TO
22S149W TO LOW TO 19S163W TO 25S172W NEARLY STATIONARY. WINDS
30 TO 40 KT WITHIN 180 NM OF A LINE FROM 10S160W TO 15S153W
TO 20S149W. WINDS 20 TO 30 KT ELSEWHERE WITHIN 600 NM N AND NE
SEMICIRCLES...AND S OF 20S BETWEEN 147W AND 160W. NUMEROUS
MODERATE TO STRONG TSTMS WITHIN 450 NM E OF LOW FROM 15S TO
23S...AND WITHIN 150 NM OF A LINE FROM 08S178W TO 11S165W
TO 15S153W. SCATTERED MODERATE TSTMS WITHIN 540 NM NE OF
TROUGH E OF 148W.
.24 HOUR FORECAST LOW 21S155W 1004 MB. TROUGH FROM 25S148W TO
LOW TO 19S161W TO 25S168W. WINDS 20 TO 35 KT WITHIN 240 NM OF
A LINE FROM 14S156W TO 18S150W TO 25S147W.
.48 HOUR FORECAST LOW 25S148W 1002 MB. TROUGH FROM LOW TO
20S152W TO 15S168W. WINDS 20 TO 30 KT WITHIN 180 NM OF A
LINE FROM 17S151W TO 21S145W TO 25S142W.


.SYNOPSIS AND FORECAST.

.LOW 22S130W 1015 MB NEARLY STATIONARY. TROUGH FROM 21S120W TO LOW
TO 20S134W NEARLY STATIONARY. ISOLATED MODERATE TSTMS FROM 19S TO
22S E OF 125W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 16S120W TO 19S130W.
.48 HOUR FORECAST TROUGH FROM 17S120W TO 13S125W.

.TROUGH FROM 12S160E TO 13S170E TO 18S179W NEARLY STATIONARY.
NUMEROUS MODERATE TO STRONG TSTMS WITHIN 120 NM OF A LINE FROM
08S160E TO 10S170E TO 14S178E.
.24 HOUR FORECAST TROUGH FROM 13S160E TO 11S172E TO 17S173W.
.48 HOUR FORECAST TROUGH FROM 12S160E TO 10S173E TO 14S178W
TO 20S173W.

.HIGH 25S163W 1010 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST HIGH DISSIPATED.

.RIDGE FROM 18S120W TO 10S140W TO 04S160W TO 02S180E TO
01S162E NEARLY STATIONARY.

.WINDS 20 KT OR LESS OVER REST OF FORECAST AREA.

.SEAS 12 TO 16 FT WITHIN 120 NM OF A LINE FROM 10S157W TO
22S150W. SEAS 8 TO 12 FT ELSEWHERE S OF 09S BETWEEN 147W
AND 162W.
.24 HOUR FORECAST SEAS 12 TO 16 FT S OF A LINE FROM 25S143W
TO 16S151W TO 25S152W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE
FROM 25S140W TO 10S154W TO 10S158W TO 25S157W.
.48 HOUR FORECAST SEAS 12 TO 16 FT S OF A LINE FROM 25S140W TO
20S144W TO 25S147W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE
FROM 25S137W TO 18S147W TO 25S151W.

.SEAS 8 FT OR LESS OVER REST OF FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 07S TO 10S BETWEEN 174W AND 179W.

$$

.FORECASTER BIRCHARD. HONOLULU HI.



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