High Seas Forecast
Issued by NWS

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773
FZPS40 PHFO 221524
HSFSP

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 24S178W 1008 MB MOVING S SLOWLY. TROUGH FROM 18S172E TO LOW
TO 22S171W MOVING S SLOWLY. ISOLATED MODERATE TSTMS WITHIN 120 NM
SE QUADRANT OF LOW...AND WITHIN 150 NM OF TROUGH E OF 173W.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 19S173E TO 25S175W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.COLD FRONT FROM 25S144W TO 18S150W TO 11S160W MOVING E SLOWLY. N
TO NW WINDS 20 TO 30 KT WITHIN 210 NM E AND NE OF COLD FRONT E OF
156W. SCATTERED MODERATE TO STRONG TSTMS WITHIN 420 NM N AND NE OF
COLD FRONT.
.24 HOUR FORECAST FRONT FROM 25S143W TO 20S148W TO 12S161W. N TO
NW WINDS 20 TO 30 KT WITHIN 150 NM E AND NE OF FRONT E OF 159W.
.48 HOUR FORECAST WEAKENING FRONT FROM 25S145W TO 18S155W TO
12S162W. WINDS DIMINISHED TO 20 KT OR LESS.

.COLD FRONT FROM 25S170E TO 22S160E MOVING NE SLOWLY. ISOLATED
MODERATE TSTMS WITHIN 60 NM NE OF COLD FRONT.
.24 HOUR FORECAST FRONT FROM 25S174E TO 21S165E TO 21S160E.
.48 HOUR FORECAST WEAKENING FRONT FROM 25S176E TO 19S160E.

.WEAK FRONT FROM 24S120W TO 19S127W NEARLY STATIONARY.
.24 HOUR FORECAST WEAK FRONT FROM 22S120W TO 19S125W.
.48 HOUR FORECAST WEAK FRONT FROM 21S120W TO 19S130W.

.TROUGH FROM 10S160E TO 10S168E TO 11S180E NEARLY STATIONARY.
SCATTERED MODERATE TO STRONG TSTMS N OF 11S W OF 179W.
.24 HOUR FORECAST TROUGH FROM 10S160E TO 09S170E TO 12S180E.
.48 HOUR FORECAST TROUGH FROM 10S160E TO 10S173E TO 11S180E.

.TROUGH FROM 25S135W TO 21S134W NEARLY STATIONARY. ISOLATED
MODERATE TSTMS WITHIN 60 NM OF TROUGH.
.24 HOUR FORECAST WEAKENING TROUGH FROM 25S135W TO 22S130W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.WEAK TROUGH FROM 25S167W TO 20S165W NEARLY STATIONARY.
.24 HOUR FORECAST WEAK TROUGH FROM 25S168W TO 18S167W.
.48 HOUR FORECAST WEAK TROUGH FROM 25S169W TO 20S168W.

.RIDGE FROM 18S120W TO 045S160W TO 03S170W TO 03S161E NEARLY
STATIONARY.

.RIDGE FROM 25S162W TO 21S161W NEARLY STATIONARY.

.OTHERWISE...WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 8 TO 11 FT WITHIN 150 NM OF A LINE FROM 25S141W TO 18S146W
TO 10S155W. SEAS 8 TO 9 FT S OF 24S W OF 162E.
.24 HOUR FORECAST SEAS 8 TO 10 FT S OF 22S W OF 177E. SEAS 8 TO 9
FT S OF 21S BETWEEN 150W AND 145W.
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 22S BETWEEN 176E AND 168E.

.OTHERWISE...SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 06S TO 17S BETWEEN 160W AND 179W.

$$

.FORECASTER HOUSTON. HONOLULU HI.



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