National Weather Service United States Department of Commerce

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FZPS40 PHFO 231536
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC SUN SEP 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SEP 23 2018.
24 HOUR FORECAST VALID 1200 UTC SEP 24 2018.
48 HOUR FORECAST VALID 1200 UTC SEP 25 2018.

.WARNINGS.

...GALE WARNING...
.LOW 24S138W 1010 MB MOVING NNE SLOWLY. TROUGH FROM LOW TO 22S133W
TO 25S127W NEARLY STATIONARY. SE TO E WINDS 20 TO 25 KT S OF LINE
FROM 25S131W TO 22S143W TO 21S148W...AND S OF 17S BETWEEN 148W AND
160W. ISOLATED MODERATE TSTMS FROM 18S TO 23S BETWEEN 134W AND 138W.
.24 HOUR FORECAST LOW 22S137W 1005 MB. TROUGH DEVELOPED TO A FRONT
FROM LOW TO 23S136W TO 21S132W TO 17S135W. WINDS 30 TO 35 KT WITHIN
60 NM OF LINE FROM 25S137W TO 23S140W. WINDS 20 TO 30 KT ELSEWHERE S
OF 10S BETWEEN 136W AND 143W...AND S OF LINE FROM 25S128W TO 24S136W.
.48 HOUR FORECAST LOW 22S132W 1010 MB. FRONT FROM LOW TO 23S131W TO
20S129W TO 09S143W. WINDS 20 TO 30 KT S OF LINE FROM 25S131W TO
23S137W TO 23S138W.

.SYNOPSIS AND FORECAST.

.LOW 06S165E 1009 MB MOVING W SLOWLY. TROUGH FROM 06S160E TO LOW TO
10S171E MOVING S SLOWLY. ISOLATED MODERATE TSTMS N OF 15S W OF
170E...AND FROM 05S TO 16S BETWEEN 170E AND 177W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 08S160E TO 09S168E TO
13S174E.
.48 HOUR FORECAST TROUGH FROM 11S160E TO 14S162E.

.COLD FRONT FROM 25S121W TO 16S135W TO 13S145W THENCE A TROUGH TO
11S153W TO 07S160W. FRONT MOVING NE SLOWLY. TROUGH NEARLY
STATIONARY. N TO NW WINDS 20 TO 25 KT E OF FRONT S OF 24S. ISOLATED
MODERATE TSTMS FROM 02S TO 09S BETWEEN 150W AND 165W.
.24 HOUR FORECAST WEAKENING FRONT FROM 23S120W TO 12S140W TO 12S146W
THENCE A TROUGH TO 09S160W. WINDS DECREASED TO 20 KT OR LESS.
.48 HOUR FORECAST FRONT FROM 23S120W TO 20S128W. WINDS 20 TO 25 KT
FROM 18S TO 23S BETWEEN 124W AND 127W.

.FRONT FROM 25S171W TO 22S173W TO 17S178W MOVING E 10 KT. N TO NW
WINDS 20 TO 25 KT S OF 24S BETWEEN FRONT AND 167W...AND FROM 19S TO
23S BETWEEN 160W AND 163W.
.24 HOUR FORECAST WEAKENING FRONT FROM 25S165W TO 19S172W TO
17S173W. WINDS DECREASED TO 20 KT OR LESS.
.48 HOUR FORECAST WEAKENING FRONT FROM 25S163W TO 20S169W.

.RIDGE FROM 17S120W TO 11S136W TO 10S147W NEARLY STATIONARY.

.RIDGE FROM 25S161W TO 19S169W MOVING E SLOWLY.

.RIDGE FROM 25S171E TO 23S178W MOVING SSE SLOWLY.

.SE TO E WINDS 20 TO 25 KT W OF 170E BETWEEN 10S AND 18S.
.24 HOUR FORECAST SE TO E WINDS 20 TO 25 KT W OF 169E BETWEEN 12S
AND 20S.
.48 HOUR FORECAST WINDS 20 TO 30 KT W OF 172E BETWEEN 14S AND 22S.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 12 TO 14 FT S OF LINE FROM 25S129W TO 23S124W TO 24S146W.
SEAS 8 TO 12 FT ELSEWHERE S OF LINE FROM 25S120W TO 22S131W TO
22S140W TO 15S156W TO 21S164W. SEAS 8 TO 10 FT S OF LINE FROM
25S180E TO 23S178E TO 20S172E TO 23S164E...AND W OF 165E BETWEEN
11S AND 18S.
.24 HOUR FORECAST SEAS 14 TO 19 FT S OF LINE FROM 25S131W TO 21S139W
TO 21S140W TO 23S142W TO 25S143W. SEAS 8 TO 14 FT ELSEWHERE S OF
LINE FROM 23S120W TO 18S133W TO 17S156W. SEAS 8 TO 10 FT W OF 164E
BETWEEN 12S AND 17S. SEAS 8 TO 9 FT S OF LINE FROM 22S177W TO
19S179W TO 19S178E TO 16S175E TO 25S169E.
.48 HOUR FORECAST SEAS 8 TO 13 FT S OF LINE FROM 21S120W TO 17S128W
TO 17S149W TO 18S153W TO 25S157W. SEAS 8 TO 11 FT W OF 165E BETWEEN
13S AND 18S. SEAS 8 TO 9 FT S OF LINE FROM 20S180E TO 16S173E TO
17S172E.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ISOLATED MODERATE TSTMS N OF 03S BETWEEN 173W AND 177W.

$$

.HONOLULU FORECAST OFFICE.


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