National Weather Service United States Department of Commerce

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FZPS40 PHFO 181533
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC WED JUL 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 JUL 18 2018.
24 HOUR FORECAST VALID 1200 UTC JUL 19 2018.
48 HOUR FORECAST VALID 1200 UTC JUL 20 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S121W TO 22S126W TO 17S141W TO 17S153W MOVING E 15 KT
S OF 22S...AND NEARLY STATIONARY ELSEWHERE. E TO SE WINDS 20 TO 30
KT S OF FRONT. ISOLATED MODERATE TSTMS WITHIN 60 NM OF LINE FROM
24S127W TO 19S139W TO 19S143W.
.24 HOUR FORECAST WEAKENING FRONT FROM 23S120W TO 21S125W TO 19S134W
TO 18S144W. E TO SE WINDS 20 TO 30 KT S OF FRONT E OF 138W...AND
WITHIN 210 NM S OF FRONT BETWEEN 138W AND 144W.
.48 HOUR FORECAST WEAK FRONT FROM 24S120W TO 22S130W. E TO SE WINDS
20 TO 25 KT S OF FRONT.

.FRONT FROM 25S163W TO 21S167W TO 18S173W MOVING E 10 KT S OF 22S
AND MOVING S SLOWLY ELSEWHERE. N TO NE WINDS 20 TO 25 KT BETWEEN
FRONT AND 157W S OF 23S.
.24 HOUR FORECAST WEAKENING FRONT FROM 25S158W TO 21S161W. WINDS
DECREASED TO 20 KT OR LESS.
.48 HOUR FORECAST FRONT WEAKENED TO A TROUGH FROM 25S157W TO 23S160W.

.WEAK FRONT FROM 25S176E TO 20S172E MOVING E 15 KT. TROUGH FROM
25S179W TO 23S179W TO 21S179W MOVING E SLOWLY WILL MERGE WITH FRONT.
.24 HOUR FORECAST FRONT FROM 25S179W TO 21S175W TO 18S176W. E TO NE
WINDS 20 TO 25 KT S OF LINE FROM 25S174W TO 23S169W TO 23S167W.
.48 HOUR FORECAST FRONT FROM 25S169W TO 21S168W TO 19S169W. WINDS
20 TO 25 KT S OF 23S BETWEEN FRONT AND 163W.

.RIDGE FROM 25S171W TO 22S169W MOVING SE 20 KT.

.RIDGE FROM 25S153W TO 21S162W MOVING E SLOWLY AND WEAKENING FROM
THE N.

.24 HOUR FORECAST SE TO E WINDS 20 TO 25 KT E OF 145W BETWEEN 07S
AND 18S.
.48 HOUR FORECAST SE TO E WINDS 20 TO 25 KT E OF 149W BETWEEN 10S
AND 18S.

.WINDS 20 KT OR LESS REST OF FORECAST AREA.

.SEAS 12 TO 14 FT S OF A LINE FROM 24S120W TO 19S133W TO 17S144W TO
14S148W. SEAS 8 TO 12 FT ELSEWHERE S OF A LINE FROM 03S120W TO
05S128W TO 08S132W TO 14S135W TO 17S144W TO 12S156W TO 14S160W TO
22S161W TO 25S165W.
.24 HOUR FORECAST SEAS 13 TO 18 FT S OF A LINE FROM 22S120W TO
17S128W TO 19S136W TO 18S146W. SEAS 8 TO 13 FT ELSEWHERE E OF
125W...AND S OF A LINE FROM 00S125W TO 03S131W TO 17S143W TO 12S151W
TO 12S159W.
.48 HOUR FORECAST SEAS 12 TO 15 FT S OF 10S E OF 132W. SEAS 8 TO 12
FT ELSEWHERE E OF 128W...AND E OF A LINE FROM 00S128W TO 03S135W TO
10S143W TO 16S143W TO 17S148W TO 22S149W TO 25S143W. SEAS 8 TO 9 FT
FROM 09S TO 13S BETWEEN 147W AND 151W...FROM 05S TO 15S BETWEEN 151W
AND 157W...AND FROM 11S TO 17S BETWEEN 157W AND 162W.

.SEAS 8 FT OR LESS REST OF FORECAST AREA.

.ISOLATED MODERATE TSTMS N OF 10S W OF 169E...AND N OF 07S BETWEEN
166W AND 180W.

$$

.HONOLULU FORECAST OFFICE.


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