The High Seas Forecast for the South Pacific

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FZPS40 PHFO 211534
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1730 UTC FRI JUL 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 JUL 21 2017.
24 HOUR FORECAST VALID 1200 UTC JUL 22 2017.
48 HOUR FORECAST VALID 1200 UTC JUL 23 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 25S176W TO 22S179E MOVING E SLOWLY THENCE A
STATIONARY FRONT TO 18S176E.
.24 HOUR FORECAST FRONT FROM 25S175W TO 18S176E.
.48 HOUR FORECAST FRONT FROM 25S172W TO 21S177W TO 18S178E.

.TROUGH FROM 24S145W TO 21S148W TO 17S151W NEARLY STATIONARY.
ASSOCIATED WINDS INCLUDED BELOW.
.24 HOUR FORECAST TROUGH FROM 24S140W TO 18S154W. ASSOCIATED
WINDS INCLUDED BELOW.
.48 HOUR FORECAST TROUGH FROM 24S137W TO 18S145W. ASSOCIATED
WINDS INCLUDED BELOW.

.RIDGE FROM 25S165W TO 20S173W.
.24 HOUR FORECAST RIDGE FROM 25S162W TO 20S173W.
.48 HOUR FORECAST RIDGE FROM 25S158W TO 20S173W.

.RIDGE FROM 21S160E TO 20S165E.
.24 HOUR FORECAST RIDGE FROM 21S160E TO 20S170E.
.48 HOUR FORECAST RIDGE FROM 25S160E TO 23S172E.

.WINDS E TO SE 20 TO 30 KT WITHIN A POLYGON BOUND BY 01S144W
10S120W 25S120W 25S162W 13S177W 04S172W 01S144W.
.24 HOUR FORECAST WINDS E TO SE 20 TO 30 KT WITHIN A POLYGON BOUND
BY 01S154W 09S120W 25S120W 25S157W 08S177W 01S154W.
.48 HOUR FORECAST WINDS E TO SE 20 TO 30 KT WITHIN A POLYGON BOUND
BY 05S120W 25S120W 25S152W 20S154W 18S134W 09S132W 05S120W.
ALSO WIND E TO SE 20 TO 25 KT FROM 04S TO 14S BETWEEN 177E AND
167W.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 TO 12 FT WITHIN A POLYGON BOUND BY 00S150W 00S140W 10S120W
25S120W 25S152W 13S178W 03S178W 00S150W. ALSO SEAS 8 TO 9 FT S OF
23S W OF 178W.
.24 HOUR FORECAST SEAS 8 TO 12 FT WITHIN A POLYGON BOUND BY 00S160W
00N140W 06S120W 25S120W 25S158W 13S179E 05S177W 00S160W...AND
ALSO S AND SE OF A LINE FROM 25S172W TO 21S173E TO 23S160E.
.48 HOUR FORECAST SEAS 8 TO 12 FT WITHIN A POLYGON BOUND BY 01S168W
01S155W 03S150W 17S155W 16S140W 06S135W 06S120W 25S120W 25S160E
12S160E 01S168W.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.SCATTERED STRONG TO SEVERE TSTMS FROM 01S TO 06S W OF 166E.
ISOLATED MODERATE TO STRONG TSTMS ELSEWHERE N OF 12S W OF 173W.

$$

.FORECASTER BEDAL. HONOLULU HI.


Additional Resources:

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