High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 181525
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC FRI AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 AUG 18 2017.
24 HOUR FORECAST VALID 1200 UTC AUG 19 2017.
48 HOUR FORECAST VALID 1200 UTC AUG 20 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 24S120W TO 20S122W TO 13S130W TO 10S143W TO 11S155W
MOVING E 15 KT S OF 16S...AND NEARLY STATIONARY ELSEWHERE. NW TO N
WINDS 20 TO 30 KT OVER FORECAST WATERS S OF 16S E OF FRONT. WINDS 20
TO 30 KT S OF 19S BETWEEN FRONT AND 135W. ISOLATED MODERATE TSTMS S
OF 22S E OF 128W.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH FROM 18S120W TO 11S128W.
WINDS EASED TO 20 KT OR LESS OVER FORECAST WATERS.
.48 HOUR FORECAST TROUGH FROM 18S120W TO 11S132W.

.FRONT FROM 25S166W TO 18S170W TO 12S180E TO 06S160E NEARLY
STATIONARY. N TO NE WINDS 20 TO 30 KT S OF 21S BETWEEN FRONT AND
160W. ISOLATED MODERATE TSTMS WITHIN 120 NM NE AND E OF FRONT S OF
19S.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH FROM 25S165W TO 19S172W.
WINDS EASED TO 20 KT OR LESS OVER FORECAST WATERS.
.48 HOUR FORECAST TROUGH MOVED S OF FORECAST AREA.

.FRONT FROM 25S163E TO 24S160E MOVING ENE 20 KT. W TO NW WINDS 20 TO
25 KT S OF 23S W OF 172E.
.24 HOUR FORECAST FRONT FROM 25S174E TO 21S168E TO 21S160E. WINDS 20
TO 30 KT S OF LINE FROM 24S180E TO 20S160E.
.48 HOUR FORECAST FRONT FROM 25S179W TO 21S175E TO 18S160E. N
TO NE WINDS 20 TO 25 KT S OF 24S BETWEEN FRONT AND 171W.

.HIGH 23S178W 1017 MB MOVING ESE 20 KT. RIDGE FROM 21S160E TO HIGH
TO 22S170W.
.24 HOUR FORECAST HIGH MOVED S OF FORECAST AREA.

.RIDGE FROM 15S120W TO 11S127W NEARLY STATIONARY AND GRADUALLY
ERODING FROM THE W.

.RIDGE FROM 25S158W TO 20S164W MOVING S SLOWLY AND GRADUALLY ERODING
FROM THE W.

.E TO SE WINDS 20 TO 25 KT S OF LINE FROM 21S135W TO 10S146W TO
10S158W.
.24 HOUR FORECAST E WINDS 20 TO 25 KT FROM 11S TO 15S BETWEEN 155W
AND 163W.
.48 HOUR FORECAST E WINDS 20 TO 25 KT FROM 11S TO 15S BETWEEN 162W
AND 170W.

.SEAS 8 TO 12 FT S OF 09S BETWEEN 140W AND 170W...AND S OF 16S E
OF 140W. SEAS 8 TO 11 FT S OF 20S BETWEEN 170W AND 178W.
.24 HOUR FORECAST SEAS 12 TO 17 FT S OF 22S W OF 168E. SEAS 8 TO 12
FT ELSEWHERE S OF LINE FROM 20S160E TO 23S178E. SEAS 8 TO 11 FT S OF
18S E OF 140W. SEAS 8 TO 10 FT S OF 08S BETWEEN 156W AND 170W. SEAS
8 TO 9 FT FROM 08S TO 20S BETWEEN 150W AND 156W...FROM 17S TO 20S
BETWEEN 142W AND 150W.
.48 HOUR FORECAST SEAS 12 TO 15 FT S OF 21S W OF 168E. SEAS 8 TO 12
FT ELSEWHERE S OF LINE FROM 15S160E TO 19S175E TO 23S177W. SEAS 8 TO
10 FT FROM 09S TO 17S BETWEEN 159W AND 169W. SEAS 8 TO 9 FT S OF 22S
E OF 126W.

.WINDS 20 KT OR LESS AND SEAS 8 FT OR LESS OVER REST OF FORECAST
AREA.

.ISOLATED MODERATE TO STRONG TSTMS FROM 03S TO 10S BETWEEN 170W AND
178W. ISOLATED MODERATE TSTMS FROM 04S TO 08S BETWEEN 177E AND 178W.

$$

.FORECASTER KINEL. HONOLULU HI.


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