High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 202146
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC SUN AUG 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC AUG 20 2017.
24 HOUR FORECAST VALID 1800 UTC AUG 21 2017.
48 HOUR FORECAST VALID 1800 UTC AUG 22 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S176W TO 18S176E THENCE TROUGH TO 10S169E TO 04S160E.
FRONT MOVING E 10 KT AND TROUGH NEARLY STATIONARY. WINDS 20 TO 25
KT WITHIN 180 NM E OF FRONT S OF 20S. ISOLATED MODERATE TSTMS
WITHIN 90 NM OF TROUGH.
.24 HOUR FORECAST FRONT FROM 25S170W TO 20S178W THENCE TROUGH TO
14S175E TO 06S160E. WINDS 20 TO 25 KT WITHIN 90 NM E OF FRONT S OF
22S.
.48 HOUR FORECAST FRONT FROM 25S163W TO 20S170W THENCE TROUGH TO
13S175E TO 05S160E. WINDS DIMINISHED TO 20 KT OR LESS.

.FRONT FROM 18S120W TO 13S128W THENCE TROUGH TO 10S135W TO
04S148W. FRONT AND TROUGH NEARLY STATIONARY.
.24 HOUR FORECAST FRONT FROM 18S120W TO 15S128W THENCE TROUGH TO
10S135W TO 08S142W. FRONT AND TROUGH DISSIPATING.
.48 HOUR FORECAST FRONT AND TROUGH DISSIPATED.

.24 HOUR FORECAST NEW TROUGH FROM 25S136W TO 20S134W.
.48 HOUR FORECAST TROUGH FROM 25S134W TO 18S132W. WINDS 20 TO 30
KT S OF 12S E OF 128W.

.RIDGE FROM 25S138W TO 20S122W MOVING SE 10 KT.

.RIDGE FROM 25S158W TO 18S178W NEARLY STATIONARY.

.RIDGE FROM 23S160E TO 19S172E MOVING SE SLOWLY.

.WINDS E TO SE 20 TO 25 KT FROM 12S TO 20S BETWEEN 135W AND 170W.
.24 HOUR FORECAST WINDS E TO SE 20 TO 25 KT FROM 12S TO 20S
BETWEEN 142W AND 160W.
.48 HOUR FORECAST WINDS E TO SE 20 TO 25 KT FROM 10S TO 18S
BETWEEN 142W AND 155W AND FROM 14S TO 19S W OF 178E.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 12 TO 14 FT S OF LINE FROM 20S160E TO 22S170E TO 25S175E.
SEAS 8 TO 12 FT ELSEWHERE S OF LINE FROM 12S160E TO 17S175E TO
20S178W TO 25S172W. SEAS 8 TO 10 FT FROM 06S TO 17S BETWEEN 158W
AND 170W AND S OF 22S E OF 138W.
.24 HOUR FORECAST SEAS 8 TO 11 FT S OF LINE FROM 10S160E TO
10S165E TO 15S175E TO 20S175W TO 25S168W...AND S OF 18S E OF
132WW. SEAS 8 TO 9 FT FROM 12S TO 18S BETWEEN 145W AND 160W.
.48 HOUR FORECAST SEAS 12 TO 14 FT S OF 23S E OF 126W. SEAS 8 TO
12 FT ELSEWHERE E OF LINE FROM 10S128W TO 20S130W TO 25S134W. SEAS
8 TO 9 FT FROM 12S TO 22S BETWEEN 172E AND 178W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 06S TO 15S BETWEEN 178E AND 168W.

$$

.FORECASTER BURKE. HONOLULU HI.



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