129  
FZPS40 PHFO 201535  
HSFSP  
 
HIGH SEAS FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
1730 UTC SAT APR 20 2019  
 
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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 APR 20 2019.  
24 HOUR FORECAST VALID 1200 UTC APR 21 2019.  
48 HOUR FORECAST VALID 1200 UTC APR 22 2019.  
 
.WARNINGS.  
 
.NONE.  
 
.SYNOPSIS AND FORECAST.  
 
.FRONT FROM 25S145W TO 22S148W TO 18S154W THENCE SHEAR LINE TO  
15S169W TO 18S176E TO 20S160E. FRONT MOVING E 10 KT AND SHEAR LINE  
NEARLY STATIONARY. S TO SE WINDS 20 TO 30 KT BETWEEN SHEAR LINE AND  
23S FROM 156W TO 180W. SE TO E WINDS 20 TO 30 KT ELSEWHERE S OF  
SHEAR LINE W OF 180E. ISOLATED MODERATE TSTMS WITHIN 240 NM OF SHEAR  
LINE W OF 160W...WITHIN 60 NM OF FRONT AND REST OF SHEAR LINE...AND  
FROM FROM 14S TO 20S BETWEEN 145W AND 149W.  
.24 HOUR FORECAST WEAKENING FRONT FROM 25S139W TO 17S149W THENCE  
SHEAR LINE TO 16S180E TO 20S160E. WINDS 20 TO 30 KT S OF SHEAR LINE  
W OF 170W...AND BETWEEN SHEAR LINE AND 21S FROM 162W TO 170W.  
.48 HOUR FORECAST FRONT WEAKENED TO A TROUGH FROM 25S137W TO  
22S140W. NEW TROUGH FROM 23S143W TO 14S156W. SHEAR LINE FROM 16S160W  
TO 16S180E TO 22S165E TO 20S160E. WINDS 20 TO 30 KT S OF SHEAR  
LINE...AND FROM 19S TO 20S BETWEEN NEW TROUGH AND 155W.  
 
.TROUGH FROM 06S160E TO 08S166E TO 04S171E MOVING S SLOWLY. ISOLATED  
MODERATE TO STRONG TSTMS N OF 13S W OF 170W.  
.24 HOUR FORECAST TROUGH FROM 06S160E TO 10S165E.  
.48 HOUR FORECAST TROUGH FROM 08S160E TO 13S163E.  
 
.WEAKENING TROUGH FROM 25S121W TO 23S124W TO 16S127W MOVING E SLOWLY,  
.24 HOUR FORECAST TROUGH DISSIPATED.  
 
.RIDGE FROM 25S133W TO 22S136W TO 16S145W TO 14S149W NEARLY  
STATIONARY AND ERODING FROM THE N.  
 
.SEAS 8 TO 12 FT S OF LINES FROM 25S144W TO 19S154W TO 15S165W TO  
15S179W AND FROM 18S179W TO 16S175E TO 16S170E TO 19S160E. SEAS 8 TO  
9 FT S OF A LINE FROM 25S123W TO 21S128W TO 24S139W.  
.24 HOUR FORECAST SEAS 8 TO 12 FT S OF LINES FROM 25S140W TO 17S153W  
TO 14S168W TO 16S179W AND FROM 18S179W TO 17S170E TO 22S167E TO  
19S160E.  
.48 HOUR FORECAST SEAS 8 TO 11 FT S OF LINES FROM 19S134W TO 18S150W  
TO 15S162W TO 16S179W...AND FROM 19S179W TO 17S173E TO 19S170E TO  
23S167E TO 20S160E.  
 
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS.  
   
ISOLATED MODERATE TSTMS N OF 08S BETWEEN 155W AND 170W
 
AND N OF  
12S BETWEEN 136W AND 155W.  
 

 
 
.HONOLULU FORECAST OFFICE.  
 
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