High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 231533
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC SUN APR 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC APR 23 2017.
24 HOUR FORECAST VALID 1200 UTC APR 24 2017.
48 HOUR FORECAST VALID 1200 UTC APR 25 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S179W TO 22S178E TO 19S175E MOVING E SLOWLY. ISOLATED
MODERATE TSTMS S OF 23S BETWEEN 167W AND 175W.
.24 HOUR FORECAST WEAKENING FRONT FROM 25S176W TO 20S178W.
.48 HOUR FORECAST WEAK FRONT FROM 25S172W TO 21S175W.

.TROUGH FROM 02S174E TO 06S179W TO 10S151W TO 12S146W MOVING SSW
SLOWLY. SCATTERED MODERATE TO STRONG TSTMS FROM 03S TO 07S BETWEEN
166W AND 170W...FROM 06S TO 08S BETWEEN 158W AND 162W...AND FROM 08S
TO 11S BETWEEN 153W AND 157W. ISOLATED MODERATE TO STRONG TSTMS
ELSEWHERE N OF TROUGH...AND WITHIN 360 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 04S169E TO 08S179E TO 12S162W TO
11S152W.
.48 HOUR FORECAST TROUGH FROM 04S163E TO 07S170E TO 09S170W TO
16S167W.

.TROUGH FROM 21S134W TO 23S133W TO 25S132W MOVING E 15 KT. ISOLATED
MODERATE TSTMS WITHIN 60 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 22S124W TO 25S124W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 22S122W TO 25S122W MOVING W SLOWLY. ISOLATED MODERATE
TSTMS WITHIN 60 NM OF TROUGH AND A LINE FROM 18S126W TO 22S122W.
.24 HOUR FORECAST TROUGH MERGED WITH THE SECOND TROUGH DESCRIBED
ABOVE.

.RIDGE FROM 25S171W TO 22S173W TO 18S179W MOVING E SLOWLY AND
ERODING FROM THE W.

.SE TO E WINDS 20 TO 25 KT S OF 22S BETWEEN 151W AND 169W...FROM 17S
TO 21S BETWEEN 151W AND 158W...AND FROM 14S TO 16S BETWEEN 156W AND
160W.
.24 HOUR FORECAST SE TO E WINDS 20 TO 25 KT S OF 19S BETWEEN 137W
AND 156W. NE TO E WINDS 20 TO 25 KT S OF 18S BETWEEN 156W AND 163W.
.48 HOUR FORECAST SE TO E WINDS 20 TO 25 KT S OF 22S BETWEEN 137W
AND 152W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 11 FT S OF A LINE FROM 25S140W TO 17S152W TO 17S167W TO
19S170E. SEAS 8 TO 10 FT S OF A LINE FROM 25S175E TO 22S170E TO
25S166E.
.24 HOUR FORECAST SEAS 8 TO 13 FT S OF A LINE FROM 25S126W TO
21S130W TO 17S142W TO 17S150W TO 13S158W TO 13S163W TO 25S172W.
SEAS 8 TO 10 FT S OF A LINE FROM 25S177W TO 22S178E TO 23S175E TO
25S169E.
.48 HOUR FORECAST SEAS 12 TO 14 FT S OF 23S BETWEEN 128W AND 145W.
SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM 17S120W TO 16S150W TO
13S151W TO 13S162W. SEAS 8 TO 9 FT IN AREA BOUNDED BY 13S162W
25S162W 15S168W 13S162W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ISOLATED MODERATE TSTMS ELSEWHERE N OF 16S W OF 177W...FROM 14S TO
19S BETWEEN 165W AND 171W...FROM 19S TO 22S BETWEEN 138W AND
154W...FROM 05S TO 10S BETWEEN 126W AND 141W...N OF 06S E OF
132W...AND WITHIN 60 NM OF 14S134W AND 18S174E.

$$

.HONOLULU HI.



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