High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 231026
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1130 UTC TUE MAY 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC MAY 23 2017.
24 HOUR FORECAST VALID 0600 UTC MAY 24 2017.
48 HOUR FORECAST VALID 0600 UTC MAY 25 2017.

.WARNINGS.

...GALE WARNING...
.LOW 19S177W 1004 MB MOVING E 20 KT. TROUGH FROM LOW TO 17S175E TO
17S167E MOVING N 10 KT. WINDS 30 TO 40 KT FROM 18S TO 23S BETWEEN
170W AND 180W. WINDS 20 TO 30 KT ELSEWHERE OVER FORECAST WATERS S OF
LINE FROM 20S165W TO 17S171W TO 17S179W TO 20S174E. ISOLATED
MODERATE TSTMS FROM 15S TO 21S BETWEEN 170W AND 177W.
.24 HOUR FORECAST LOW 19S172W 1006 MB. SECOND LOW 23S163W 1007 MB.
TROUGH FROM SECOND LOW TO FIRST LOW TO 14S179W TO 14S177E TO
15S173E. WINDS 30 TO 40 KT OVER FORECAST WATERS S OF 21S BETWEEN
160W AND 171W. WINDS 20 TO 30 KT S OF 21S BETWEEN 153W AND 160W...
AND ELSEWHERE S OF 17S BETWEEN 164W AND 177W.
.48 HOUR FORECAST LOW 18S168W 1011 MB. SECOND LOW MOVED S OF
FORECAST AREA. TROUGH FROM 25S159W TO 20S164W TO LOW TO 14S171W.
WINDS 20 TO 30 KT S OF LINE FROM 24S152W TO 22S160W TO 23S163W TO
20S168W TO 21S175W.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S149W TO 22S157W TO 18S164W MOVING E 20 KT S OF 23S...
AND NEARLY STATIONARY ELSEWHERE. E TO SE WINDS 20 TO 30 KT S OF
FRONT E OF 160W...AND S OF 20S BETWEEN 160W AND 165W. ALSO...SEE
WINDS ASSOCIATED WITH GALE AREA DESCRIBED ABOVE.
.24 HOUR FORECAST FRONT MOVED S OF FORECAST AREA. ASSOCIATED TROUGH
FROM 25S143W TO 17S148W. WINDS EASED TO 20 KT OR LESS. SEE WINDS
ASSOCIATED WITH GALE AREA DESCRIBED ABOVE.
.48 HOUR FORECAST TROUGH DISSIPATED. SEE WINDS ASSOCIATED WITH GALE
AREA DESCRIBED ABOVE.

.TROUGH FROM 25S122W TO 21S130W TO 18S133W NEARLY STATIONARY.
ISOLATED MODERATE TSTMS S OF 23S BETWEEN 123W AND 126W.
.24 HOUR FORECAST TROUGH FROM 25S132W TO 20S135W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 03S138W TO 09S134W MOVING W 10 KT. ISOLATED MODERATE
TSTMS WITHIN 90 NM OF POINT 07S133W.
.24 HOUR FORECAST TROUGH FROM 05S142W TO 10S139W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 06S162W TO 10S160W TO 12S158W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH FROM 08S165W TO 14S163W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 04S160E TO 12S173E NEARLY STATIONARY. ISOLATED MODERATE
TSTMS WITHIN 60 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 05S160E TO 11S172E.
.48 HOUR FORECAST TROUGH DISSIPATED.

.HIGH 06S177E 1009 MB NEARLY STATIONARY. RIDGE FROM 07S169E TO HIGH
TO 09S174W TO 14S167W.
.24 HOUR FORECAST HIGH 07S175E 1010 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.RIDGE FROM 25S144W TO 22S149W MOVING E 10 KT AND GRADUALLY ERODING
FROM THE W.

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

.SEAS 13 TO 20 FT FROM 18S TO 24S BETWEEN 163W AND 175E. SEAS 8 TO
13 FT ELSEWHERE S OF LINE FROM 21S131W TO 17S163W TO 14S170W TO
16S171E TO 23S165E.
.24 HOUR FORECAST SEAS 12 TO 17 FT S OF 21S BETWEEN 156W AND 176W.
SEAS 8 TO 12 FT ELSEWHERE S OF LINE FROM 24S136W TO 16S153W TO
11S160W TO 14S178W TO 18S169E.
.48 HOUR FORECAST SEAS 12 TO 14 FT S OF 23S BETWEEN 161W AND 169W.
SEAS 8 TO 12 FT ELSEWHERE S OF LINE FROM 24S133W TO 19S143W TO
22S160W TO 17S168W TO 21S176E.

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

.ISOLATED MODERATE TSTMS WITHIN 60 NM OF LINE FROM 03S176E TO
06S176W TO 04S174W.

$$

.FORECASTER KINEL. HONOLULU HI.



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