703  
FZPS40 PHFO 201535  
HSFSP  
 
HIGH SEAS FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
1730 UTC SAT OCT 20 2018  
 
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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 OCT 20 2018.  
24 HOUR FORECAST VALID 1200 UTC OCT 21 2018.  
48 HOUR FORECAST VALID 1200 UTC OCT 22 2018.  
 
.WARNINGS.  
 
.NONE.  
 
.SYNOPSIS AND FORECAST.  
 
.COLD FRONT FROM 25S141W TO 21S144W TO 18S149W MOVING E 15 KT.  
ISOLATED MODERATE TSTMS S OF 21S WITHIN 300 NM E OF FRONT.  
.24 HOUR FORECAST FRONT FROM 25S134W TO 21S140W TO 18S144W.  
.48 HOUR FORECAST FRONT FROM 25S130W TO 21S136W. TROUGH FROM  
18S144W TO 21S136W.  
 
.COLD FRONT FROM 25S146W TO 22S155W MOVING NE 15 KT.  
.24 HOUR FORECAST FRONT FROM 25S142W TO 22S146W.  
.48 HOUR FORECAST FRONT MERGED WITH FRONT DESCRIBED IMMEDIATELY  
ABOVE.  
 
.TROUGH FROM 08S160E TO 14S165E TO 17S170E NEARLY STATIONARY.  
.24 HOUR FORECAST TROUGH FROM 13S160E TO 16S165E TO 18S172E.  
ASSOCIATED WINDS INCLUDED BELOW.  
.48 HOUR FORECAST DEVELOPING LOW NEAR 17S173E 1009 MB. TROUGHS FROM  
LOW TO 16S179W AND FROM LOW TO 16S165E. ASSOCIATED WINDS AND SEAS  
INCLUDED BELOW.  
 
.TROUGH FROM 06S171W TO 11S165W TO 14S160W MOVING W 10 KT.  
.24 HOUR FORECAST TROUGH FROM 06S175W TO 14S168W.  
.48 HOUR FORECAST TROUGH FROM 06S179W TO 14S173W.  
 
.RIDGE FROM 23S120W TO 18S135W.  
 
.WINDS SE TO E 20 TO 30 KT FROM 13S TO 23S BETWEEN 167E AND 164W.  
.24 HOUR FORECAST WINDS SE TO E 20 TO 30 KT FROM 15S TO 25S BETWEEN  
165E AND 167W.  
.48 HOUR FORECAST WINDS SE TO E 20 TO 30 KT FROM 16S TO 23S BETWEEN  
170E AND 173W.  
 
.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.  
 
.SEAS 8 TO 12 FT OVER FORECAST WATERS S AND SW OF A LINE FROM 17S171E  
TO 14S177W TO 14S162W TO 25S150W. ALSO SEAS 8 TO 10 FT OVER FORECAST  
WATERS S OF 05S E OF 122W.  
.24 HOUR FORECAST SEAS 8 TO 14 FT OVER FORECAST WATERS S AND SW OF  
A LINE FROM 18S166E TO 13S177W TO 13S158W TO 25S130W. SEAS ELSEWHERE  
SUBSIDED TO 8 FT OR LOWER.  
.48 HOUR FORECAST SEAS 8 TO 14 FT OVER FORECAST WATERS S OF A LINE  
FROM 16S170E TO 14S170W TO 10S157W TO 16S142W TO 25S123W.  
 
.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.  
 
.OTHERWISE SCATTERED MODERATE TO STRONG TSTMS FROM 03S TO 11S BETWEEN  
160E AND 168E. ISOLATED MODERATE TSTMS ELSEWHERE FROM 00S TO 22S  
BETWEEN 160E AND 165W.  
 

 
 
.FORECASTER BEDAL. HONOLULU HI.  
 
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