High Seas Forecast
Issued by NWS

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000
FZPS40 PHFO 210014 CCA
HSFSP

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS...CORRECTED

...GALE WARNING...
.LOW NEAR 18S169W 1004 MB MOVING SE 35 KT. TROUGHS FROM LOW TO 19S164W
TO 22S160W AND FROM LOW TO 19S175W. WINDS 30 TO 40 KT WITHIN 180 NM
OF LOW CENTER N AND NE QUADRANTS. WINDS 20 TO 30 KT ELSEWHERE WITHIN
300 NM N OF TROUGH AXIS...AND ALSO WITHIN 150 NM S OF TROUGH AXIS.
SEAS 8 TO 15 FT WITHIN 300 NM N OF TROUGH AXIS AND 150 NM S OF TROUGH
AXIS. SCATTERED STRONG TSTMS WITHIN 360 NM OF LOW CENTER E AND SE
QUADRANTS. ISOLATED MODERATE TO STRONG TSTMS ELSEWHERE WITHIN 180 NM
EITHER SIDE OF TROUGH AXIS.
.24 HOUR FORECAST LOW NEAR 25S158W 1001 MB. TROUGH FROM LOW TO 22S160W
TO 19S164W. WINDS 30 TO 40 KT WITHIN 240 NM OF LOW CENTER NE QUADRANT
AND WITHIN 180 N OF LOW CENTER E QUADRANT. WINDS 20 TO 30 KT ELSEWHERE
WITHIN 360 NM E AND NE OF TROUGH AXIS...AND ALSO WITHIN 180 NM SW AND
W OF TROUGH AXIS. SEAS 8 TO 15 FT WITHIN 360 NM E AND NE OF TROUGH AXIS.
SEAS 8 TO 12 FT WITHIN 180 NM SW AND W OF TROUGH AXIS.
.48 HOUR FORECAST LOW JUST S OF FORECAST AREA NEAR 30N151W 1000 MB.
WIND NW 20 TO 25 KT AND SEAS 8 TO 12 FT S OF 23S BETWEEN 154W AND 144W.

...GALE WARNING...

.LOW NEAR 17S175E 1003 MB MOVING SE 25 KT. TROUGHS FROM LOW TO 18S177W
TO 19S164W AND FROM LOW TO 14S168E TO 14S160E. WINDS 20 TO 30 KT
WITHIN 480 NM N OF TROUGH AXIS. WINDS 20 TO 25 KT WITHIN 240 NM
S OF TROUGH AXIS. SEAS 8 TO 12 FT WITHIN 360 NM N OF TROUGH AXIS E OF
175E. SCATTERED STRONG TO SEVERE TSTMS WITHIN 240 NM
N AND NW OF LOW CENTER. ISOLATED MODERATE TO STRONG TSTMS WITHIN
240 NM EITHER SIDE OF TROUGH AXIS. ADDITIONAL ASSOCIATED TSTMS INCLUDED
WITH CONVERGENCE ZONE DESCRIBED BELOW.
.24 HOUR FORECAST LOW NEAR 19S171W 1003 MB. TROUGH FROM LOW TO 19S164W
AND FROM LOW TO 17S175E TO 14S168E TO 14S160E. WINDS 30 TO 35 KT WITHIN
240 NM N OF TROUGH AXIS E OF 175E. WINDS 20 TO 30 KT ELSEWHERE WITHIN
360 NM N OF TROUGH AXIS...AND ALSO WITHIN 240 NM S OF TROUGH AXIS.
SEAS 8 TO 15 FT WITHIN 300 NM N OF TROUGH AXIS E OF 175E. ALSO
SEAS 8 TO 12 FT WITHIN 150 NM S OF TROUGH AXIS E OF 175W.
.48 HOUR FORECAST LOW NEAR 25S161W 1005 MB. TROUGH FROM LOW TO 21S165W
TO 19S171W TO 17S175E TO 14S168E. WINDS 30 TO 40 KT WITHIN 240 NM NE
OF TROUGH AXIS E OF 165W. WINDS 20 TO 30 KT ELSEWHERE WITHIN 360 NM
N OF TROUGH AXIS...AND ALSO WITHIN 240 NM S OF TROUGH AXIS. SEAS 8 TO
15 FT WITHIN 300 NM E AND NE OF TROUGH AXIS E OF 179E. SEAS 8 TO 12 FT
WITHIN 300 NM SW OF TROUGH AXIS E OF 171W.

.SYNOPSIS AND FORECAST.

.LOW DEVELOPING OVER FORECAST AREA.
.48 HOUR FORECAST LOW NEAR 14S160E 1007 MB.

.TROUGH FROM 06S156W TO 10S152W TO 12S145W. ISOLATED MODERATE TO
STRONG TSTMS WITHIN 240 NM EITHER SIDE OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH FROM 08S158W TO 13S152W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.TROUGH FROM 15S159W TO 16S153W TO 19S149W. SCATTERED MODERATE TO
STRONG TSTMS WITHIN 240 NM EITHER SIDE OF TROUGH AXIS.
.24 HOUR FORECAST TROUGH FROM 22S151W TO 25S141W.
.48 HOUR FORECAST TROUGH S OF FORECAST AREA.

.RIDGE FROM 24S120W TO 16S140W.
.24 HOUR FORECAST RIDGE FROM 23S120W TO 21S138W.
.48 HOUR FORECAST RIDGE FROM 23S120W TO 21S138W TO 13S149W.

.RIDGE FROM 11S164W TO 06S165W.
.24 HOUR FORECAST RIDGE FROM 12S161W TO 07S178E.
.48 HOUR FORECAST RIDGE FORM 12S161W TO 05S169E.

.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.

.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.

.CONVERGENCE ZONE 07S160E TO 07S166E TO 11S175E. SCATTERED MODERATE
TO STRONG TSTMS WITHIN 180 NM EITHER SIDE OF THE LINE OF CONVERGENCE.

$$

.FORECASTER BEDAL. HONOLULU HI.



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