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 THU MAY 23 2019

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MAY 23 2019.
24 HOUR FORECAST VALID 1200 UTC MAY 24 2019.
48 HOUR FORECAST VALID 1200 UTC MAY 25 2019.

.WARNINGS.

...GALE WARNING...
.LOW 20S179E 1010 MB WILL MOVE W 15 KT. TROUGH FROM 18S175W TO LOW
TO 19S174E TO 23S167E MOVING W SLOWLY. S TO SE WINDS 30 TO 40 KT
FROM 20S TO 22S BETWEEN 179W AND 179E...AND FROM 19S TO 22S BETWEEN
176E AND 173E. E TO SE WINDS 20 TO 30 KT ELSEWHERE S OF LOW AND
TROUGH...AND S OF 19S BETWEEN 168W AND 176W...AND S OF 21S BETWEEN
163E AND 171E. ISOLATED MODERATE TSTMS S OF LOW AND TROUGH BETWEEN
175W AND 174E.
.24 HOUR FORECAST LOW 19S173E 1012 MB. TROUGH FROM 20S180E TO LOW TO
20S167E TO 25S164E. E TO SE WINDS 20 TO 30 KT S OF A LINE FROM
19S170W TO 20S171E TO 23S167E.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 21S168E TO 22S174E. E
TO NE WINDS 20 TO 30 KT S OF A LINE FROM 17S170W TO 23S180W TO
24S174E.

.SYNOPSIS AND FORECAST.

.LOW 05S162E 1009 MB. TROUGH FROM 03S160E TO LOW TO 09S169E TO
20S174E. LOW AND TROUGH NEARLY STATIONARY. SCATTERED MODERATE TO
STRONG TSTMS FROM 08S TO 12S BETWEEN 168E AND 175E. ISOLATED
MODERATE TO STRONG TSTMS N OF 13S W OF 180E.
.24 HOUR FORECAST LOW 05S164E 1012 MB. TROUGH FROM 01S160E TO LOW TO
10S166E TO 12S170E.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 03S160E TO 07S165E TO
15S171E.

.COLD FRONT FROM 25S133W TO 21S140W MOVING E 10 KT.
.24 HOUR FORECAST FRONT FROM 25S127W TO 21S132W TO 21S135W.
.48 HOUR FORECAST FRONT FROM 25S127W TO 23S130W.

.FIRST TROUGH FROM 03S179W TO 06S174W TO 09S170W TO 14S169W TO
16S167W. SECOND TROUGH FROM 10S165W TO 13S162W TO 17S159W. THIRD
TROUGH FROM 16S154W TO 20S149W TO 20S142W. TROUGHS SLOW MOVING AND
WILL JOIN. SE TO E WINDS 20 TO 25 KT FROM 18S TO 20S BETWEEN 155W
AND 161W. SCATTERED MODERATE TSTMS WITHIN 240 NM OF FIRST
TROUGH...AND WITHIN 180 NM OF SECOND TROUGH. ISOLATED MODERATE TSTMS
WITHIN 90 NM OF THIRD TROUGH.
.24 HOUR FORECAST NEW LOW 16S162W 1011 MB. TROUGH FROM 03S178W TO
13S170W TO LOW TO 16S153W TO 21S148W TO 21S135W. SE TO E WINDS 20 TO
25 KT S OF A LINE FROM 17S162W TO 19S170W.
.48 HOUR FORECAST LOW 15S158W 1010 MB. TROUGH FROM 06S173W TO LOW TO
25S133W. SE WINDS 20 TO 30 KT S OF LOW AND TROUGH BETWEEN 143W AND
159W...AND ELSEWHERE S OF A LINE FROM 16S159W TO 17S170W.

.RIDGE FROM 20S138W TO 19S128W TO 21S120W MOVING S SLOWLY.

.SEAS 12 TO 14 FT S OF A LINE FROM 25S133W TO 23S136W TO 21S142W TO
21S152W....AND FROM 20S TO 24S BETWEEN 179W AND 173E. SEAS 8 TO 12
FT ELSEWHERE S OF A LINE FROM 25S126W TO 21S131W TO 16S146W TO
16S150W TO 12S152W TO 09S162W TO 19S176W TO 17S174E TO 23S167E.
SEAS 8 TO 9 FT E OF A LINE FROM 03S120W TO 07S124W TO 14S120W.
.24 HOUR FORECAST SEAS 12 TO 14 FT S OF A LINE FROM 25S122W TO
21S130W TO 23S153W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM
18S120W TO 10S128W TO 17S139W TO 15S161W TO 21S175W TO 19S172E TO
25S166E.
.48 HOUR FORECAST SEAS 8 TO 12 FT S OF A LINE FROM 05S120W TO
04S131W TO 18S138W TO 15S159W TO 16S170W TO 23S174E.

.WINDS 20 KT OR LESS...SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ISOLATED MODERATE TSTMS N OF 10S BETWEEN 161W AND 166W...AND WITHIN
60 NM OF 08S151W AND 03S151W.

$$

.FORECASTER NINETY ONE. HONOLULU FORECAST OFFICE.


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