High Seas Forecast
Issued by NWS

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581
FZPS40 PHFO 192226
HSFSP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2330 UTC SUN NOV 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 NOV 19 2017.
24 HOUR FORECAST VALID 1800 UTC NOV 20 2017.
48 HOUR FORECAST VALID 1800 UTC NOV 21 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 25S172W TO 20S176W TO 15S177E TO 11S160E. FRONT MOVING E
10 KT S OF 23S...AND NEARLY STATIONARY ELSEWHERE. ISOLATED MODERATE
TSTMS WITHIN 240 NM N AND NE...AND 180 NM S AND SW...OF FRONT.
.24 HOUR FORECAST FRONT FROM 25S170W TO 18S180E TO 12S170E. TROUGH
FROM 12S160E TO 15S165E.
.48 HOUR FORECAST FRONT FROM 25S164W TO 17S179W. TROUGH FROM 14S160E
TO 15S165E. E WINDS 20 TO 25 KT FROM 18S TO 21S BETWEEN 161E AND
166E.

.FRONT FROM 25S127W TO 20S129W TO 16S134W NEARLY STATIONARY.
ISOLATED MODERATE TSTMS S OF 22S BETWEEN 124W AND 134W.
.24 HOUR FORECAST FRONT FROM 25S125W TO 22S126W TO 19S130W. N TO NE
WINDS 20 TO 25 KT BETWEEN FRONT AND 120W S OF 23S.
.48 HOUR FORECAST FRONT FROM 25S124W TO 21S128W. WINDS EASED TO 20
KT OR LESS.

.TROUGH FROM 10S159W TO 12S141W MOVING WSW SLOWLY. ISOLATED MODERATE
TSTMS WITHIN 75 NM OF TROUGH.
.24 HOUR FORECAST TROUGH FROM 11S162W TO 12S144W.
.48 HOUR FORECAST TROUGH FROM 12S161W TO 13S142W.

.TROUGH FROM 02S179W TO 06S176W TO 08S172W MOVING W SLOWLY. ISOLATED
MODERATE TSTMS FROM 06S TO 10S BETWEEN 168W AND 180W...AND FROM 03S
TO 06S BETWEEN 174W AND 179W.
.24 HOUR FORECAST TROUGH FROM 03S173E TO 11S175W.
.48 HOUR FORECAST TROUGH FROM 06S173E TO 10S176E TO 14S179W.

.RIDGE FROM 25S165W TO 20S173W NEARLY STATIONARY.

.RIDGE FROM 25S162E TO 23S170E TO 22S178W NEARLY STATIONARY.

.WINDS 20 KT OR LESS OVER REST OF FORECAST AREA.

.SEAS 8 TO 9 FT S OF 23S BETWEEN 131W AND 139W.
.24 HOUR FORECAST SEAS 8 TO 9 FT S OF 23S E OF 126W.
.48 HOUR FORECAST SEAS SUBSIDED TO 8 FT OR LESS.

.SEAS 8 FT OR LESS OVER REST OF FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 15S TO 18S BETWEEN 156W AND 165W.

$$

.FORECASTER KINEL. HONOLULU HI.



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