High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 251533
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC WED APR 25 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 APR 25 2018.
24 HOUR FORECAST VALID 1200 UTC APR 26 2018.
48 HOUR FORECAST VALID 1200 UTC APR 27 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 25S139W TO 17S158W THENCE A TROUGH TO 15S164W TO
08S172W. FRONT MOVING E 10 KT S OF 20S...AND NEARLY STATIONARY
ELSEWHERE. TROUGH MOVING SW SLOWLY. NW WINDS 20 TO 25 KT WITHIN 270
NM E OF FRONT S OF 23S. SCATTERED MODERATE TSTMS WITHIN 120 NM NE OF
FRONT BETWEEN 147W AND 157W. ISOLATED MODERATE TSTMS ELSEWHERE
WITHIN 240 NM OF FRONT...AND WITHIN 90 NM N OF TROUGH E OF 163W.
.24 HOUR FORECAST FRONT FROM 25S132W TO 21S139W. TROUGH JOINED WITH
FORECAST FRONT DESCRIBED BELOW. WINDS EASED TO 20 KT OR LESS.
.48 HOUR FORECAST FRONT FROM 25S120W TO 21S130W.

.24 HOUR FORECAST NEW FRONT FROM 25S157W TO 23S157W TO 17S164W
THENCE A TROUGH TO 08S174W.
.48 HOUR FORECAST FRONT FROM 25S152W TO 19S158W THENCE A TROUGH TO
13S170W.  NW WINDS 20 TO 25 KT WITHIN 240 NM E OF FRONT S OF 22S.

.LOW JUST W OF FORECAST AREA MOVING SE 15 KT.
.24 HOUR FORECAST LOW 23S161E 1011 MB. TROUGH FROM 25S161E TO LOW TO
20S160E.
.48 HOUR FORECAST LOW MOVED S OF AREA. TROUGH BECOME A FRONT FROM
25S165E TO 20S165E TO 16S160E.

.RIDGE FROM 23S120W TO 19S131W TO 14S158W MOVING S SLOWLY.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 9 FT S OF LINE FROM 25S149W TO 21S162W TO 25S168W...AND S
OF 24S BETWEEN 134W AND 138W.
.24 HOUR FORECAST SEAS SUBSIDED TO 8 FT OR LESS.
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 23S E OF 132W.

.OTHERWISE SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ITCZ FROM 04S134W TO 04S143W TO 03S158W. ISOLATED MODERATE TO
STRONG TSTMS WITHIN 90 NM OF ITCZ BETWEEN 142W AND 154W.

.ISOLATED MODERATE TSTMS W OF 170E S OF 12S...FROM 12S TO 05S
BETWEEN 165E AND 174E...N OF 07S W OF 167E...FROM 15S TO 10S BETWEEN
173E AND 177W...AND WITHIN 60 NM OF 02S175W AND 13S172W.

$$

.HONOLULU FORECAST OFFICE.



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