922  
FZPS40 PHFO 211528  
HSFSP  
 
HIGH SEAS FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
1730 UTC THU SEP 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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 SEP 21 2017.  
24 HOUR FORECAST VALID 1200 UTC SEP 22 2017.  
48 HOUR FORECAST VALID 1200 UTC SEP 23 2017.  
 
.WARNINGS.  
 
.NONE.  
 
.SYNOPSIS AND FORECAST.  
   
FRONT FROM 25S151W TO 21S153W TO 17S159W TO 13S170W
 
CONTINUING  
AS A TROUGH TO 10S177E TO 01S161E. FRONT MOVING E 20 KT S OF 17S.  
TROUGH AND REMAINDER OF FRONT NEARLY STATIONARY. NW TO N WINDS 20  
TO 25 KT WITHIN 180 NM E OF FRONT S OF 23S. ISOLATED MODERATE  
TSTMS WITHIN 90 NM OF TROUGH W OF 169E...AND WITHIN 270 NM E OF  
FRONT S OF 21S.   
24 HOUR FORECAST FRONT FROM 25S143W TO 17S154W TO 14S164W
 
 
CONTINUING AS A TROUGH TO 13S180E TO 07S163E. NW TO N WINDS 20 TO  
25 KT WITHIN 150 NM E OF FRONT S OF 24S.  
.48 HOUR FORECAST WEAKENING FRONT FROM 25S140W TO 18S153W TO  
16S160W. TROUGH FROM 13S176W TO 12S169E TO 07S160E. WINDS  
DIMINISHED TO 20 KT OR LESS.  
 
.FRONT FROM 25S122W TO 22S131W TO 25S139W NEARLY STATIONARY.  
ISOLATED MODERATE TSTMS S OF 21S BETWEEN 131W AND 144W.  
.24 HOUR FORECAST WEAK FRONT FROM 24S120W TO 23S129W.  
.48 HOUR FORECAST WEAK FRONT MOVED JUST SE OF FORECAST AREA.  
 
.COLD FRONT FROM 25S166E TO 23S160E MOVING NE SLOWLY.  
.24 HOUR FORECAST WEAKENING FRONT FROM 25S175E TO 21S163E.  
.48 HOUR FORECAST WEAK FRONT FROM 25S171W TO 23S177E.  
 
.HIGH 24S172E 1018 MB MOVING E 20 KT. RIDGE FROM 23S166E TO HIGH TO  
24S179E TO 19S160W NEARLY STATIONARY.  
.24 HOUR FORECAST HIGH 23S179W 1017 MB.  
.48 HOUR FORECAST HIGH 22S167W 1017 MB.  
   
RIDGE FROM 21S120W TO 21S125W NEARLY STATIONARY
 
AND GRADUALLY  
ERODING FROM THE W.  
 
.RIDGE FROM 20S136W TO 15S154W NEARLY STATIONARY.  
   
OTHERWISE
 
WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.  
 
.SEAS 8 TO 10 FT S OF 21S BETWEEN 157W AND 169W.  
.24 HOUR FORECAST SEAS 8 TO 10 FT S OF 23S BETWEEN 149W AND 158W.  
.48 HOUR FORECAST SEAS 8 TO 9 FT S OF 23S BETWEEN 176W AND 176E.  
   
OTHERWISE
 
SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.  
 
.ISOLATED MODERATE TSTMS WITHIN 75 NM OF A POINT 04S179E.  
 

 
 
.FORECASTER HOUSTON. HONOLULU HI.  
 
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