528  
FZPS40 PHFO 212314  
HSFSP  
 
HIGH SEAS FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
2330 UTC THU OCT 21 2021  
 
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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 OCT 21 2021.  
24 HOUR FORECAST VALID 1800 UTC OCT 22 2021.  
48 HOUR FORECAST VALID 1800 UTC OCT 23 2021.  
 
.WARNINGS.  
 
.NONE.  
 
.SYNOPSIS AND FORECAST.  
 
.COLD FRONT FROM 25S145W TO 20S150W TO 16S153W MOVING E SLOWLY  
THENCE A STATIONARY FRONT TO 12S159W. ASSOCIATED WINDS INCLUDED  
BELOW. NUMEROUS MODERATE TSTMS S OF 16S WITHIN 300 NM E OF FRONT.  
ISOLATED MODERATE TSTMS ELSEWHERE WITHIN 480 NM E AND NE OF FRONT.  
.24 HOUR FORECAST FRONT FROM 25S144W TO 20S148W TO 16S152W TO  
12S159W. ASSOCIATED WINDS INCLUDED BELOW.  
.48 HOUR FORECAST FRONT FROM 25S142W TO 20S146W TO 16S151W TO  
12S159W. ASSOCIATED WINDS INCLUDED BELOW.  
 
.COLD FRONT FROM 25S168E TO 20S166E TO 15S164E MOVING ESE 15 KT.  
ASSOCIATED TROUGH FROM 10S160E TO 15S164E NEARLY STATIONARY AND  
FROM 25S166E TO 20S160E MOVING E 20 KT. WIND E TO N 20 TO 30 KT  
AND SEAS 8 TO 10 FT S OF 20S BETWEEN FRONT AND 178E. SCATTERED  
MODERATE TSTMS WITHIN 210 NM EITHER SIDE OF TROUGH AXIS.  
.24 HOUR FORECAST FRONT FROM 25S173E TO 21S171E TO 16S169E.  
TROUGH FROM 10S160E TO 15S164E. WIND E TO N 20 TO 25 KT S OF 23S  
BETWEEN FRONT AND 179E.  
.48 HOUR FORECAST FRONT FROM 25S175E TO 19S173E. TROUGH DISSIPATED.  
ASSOCIATED WINDS DIMINISHED TO 20 KT OR LESS.  
 
.TROUGH FROM 11S177E TO 11S175W TO 10S166W TO 12S159W NEARLY  
STATIONARY. ASSOCIATED WINDS INCLUDED BELOW.  
.24 HOUR FORECAST TROUGH FROM 08S179E TO 10S168W TO 12S159W.  
ASSOCIATED WINDS INCLUDED BELOW.  
.48 HOUR FORECAST TROUGH FROM 06S175E TO 10S173W TO 12S159W.  
ASSOCIATED WINDS INCLUDED BELOW.  
 
.TROUGH FROM 25S166E TO 20S160E MOVING E 20 KT. WINDS SW TO S 20 TO  
25 KT OVER FORECAST WATERS S OF TROUGH AXIS. ASSOCIATED TSTMS INCLUDED  
BELOW.  
.24 HOUR FORECAST TROUGH FROM 25S171E TO 21S169E. ASSOCIATED WINDS  
DIMINISHED TO 20 KT OR LESS.  
.48 HOUR FORECAST TROUGH MERGED WITH SECOND COLD FRONT DESCRIBED  
ABOVE.  
 
.OTHERWISE WINDS E TO N 20 TO 30 KT FROM 07S TO 25S BETWEEN 142W  
AND 120W. ALSO WINDS SE TO E 20 TO 25 KT WITHIN 240 NM EITHER SIDE  
OF A LINE FROM 14S178E TO 19S166W TO 25S156W.  
.24 HOUR FORECAST WINDS E TO NW 20 TO 30 KT WITHIN AN AREA BOUND BY  
08S136W 08S120W 25S120W 25S144W 19S146W 15S140W 08S136W. ALSO  
WIND SE 20 TO 25K T WITHIN 240 NM EITHER SIDE OF A LINE FROM  
11S179E TO 25S168E.  
.48 HOUR FORECAST WINDS E TO NW 20 TO 30 KT WITHIN AN AREA BOUND BY  
08S132W 08S120W 25S120W 25S142W 15S150W 08S132W. ALSO WIND SE 20 TO  
25 KT WITHIN 180 NM EITHER SIDE OF A LINE FROM 11S177E TO 22S170W.  
 
.WINDS 20 KT OR LESS REMAINDER FORECAST AREA.  
 
.SEAS 8 TO 11 FT WITHIN AN AREA BOUND BY 06S120W 25S120W 25S142W  
08S135W 06S120W.  
.24 HOUR FORECAST SEAS 8 TO 11 FT WITHIN AN AREA BOUND BY 04S120W  
25S120W 25S140W 06S130W 04S120W.  
.48 HOUR FORECAST SEAS 8 TO 11 FT WITHIN AN AREA BOUND BY 06S120W  
25S120W 25S150W 19S145W 19S135W 10S130W 06S120W.  
 
.SEAS 8 FT OR LOWER REMAINDER FORECAST AREA.  
 
.RIDGE FROM 25S132W TO 18S138W TO 09S150W.  
 
.RIDGE FROM 25S179W TO 09S167E.  
 
.OTHERWISE NUMEROUS MODERATE TO STRONG TSTMS FROM 13S TO 21S  
BETWEEN 171E AND 175E. ISOLATED MODERATE TSTMS ELSEWHERE FROM  
08S TO 18S BETWEEN 175E AND 165W.  
 

 
 
.FORECASTER BEDAL. HONOLULU HI.  
 
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