247  
FZPS40 PHFO 190330  
HSFSP  
 
HIGH SEAS FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
0530 UTC THU SEP 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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 0000 UTC SEP 19 2019.  
24 HOUR FORECAST VALID 0000 UTC SEP 20 2019.  
48 HOUR FORECAST VALID 0000 UTC SEP 21 2019.  
 
.WARNINGS.  
 
.NONE.  
 
.SYNOPSIS AND FORECAST.  
 
.LOW 03S162E 1010 MB MOVING W 10 KT. TROUGH FROM LOW TO 05S177E  
TO 05S172W TO 09S155W NEARLY STATIONARY.SCATTERED MODERATE TSTMS  
WITHIN 420 NM OF LOW...AND FROM 10S TO 05S W OF 165W.  
.24 HOUR FORECAST LOW MOVED W OF FORECAST AREA. TROUGH FROM  
03S170E TO 05S178E TO 10S148W. WINDS DECREASED TO 20 KT OR LESS.  
.48 HOUR FORECAST TROUGH 04S160E TO 09S173E TO 10S160W.  
 
.FRONT FROM 23S120W TO 17S127W. FRONT MOVING S 10 KT. SEE SEAS  
BELOW.  
.24 HOUR FORECAST WEAKENING FRONT FROM 25S125W TO 21S132W. WINDS  
20 TO 25 KT E OF 128W FROM 20S TO 10S. SEE SEAS BELOW.  
.48 HOUR FORECAST FRONT DISSIPATED.  
 
.FRONT FROM 25S143W TO 13S150W TO 13S154W THENCE TROUGH TO  
11S176E.FRONT MOVING E 10 KT S OF 14S. TROUGH AND REMAINDER OF  
FRONT NEARLY STATIONARY. WINDS 20 TO 30 KT S OF A LINE FROM  
22S159W TO 18S141W TO 22S136W...AND FROM 20S TO 10S W OF 176W.  
SEE SEAS BELOW. ISOLATED MODERATE TSTMS WITHIN 90 NM OF FRONT AND  
TROUGH.  
.24 HOUR FORECAST FRONT FROM 25S137W TO 13S147W TO 09S152W  
THENCE TROUGH TO 12S154W TO 11S175E. WINDS DECREASED FROM 20 KT OR  
LESS. SEE SEAS BELOW.  
.48 HOUR FORECAST FRONT FROM 25S134W TO 15S144W THENCE TROUGH TO  
12S161W TO 11S179W. SEE SEAS BELOW.  
 
.RIDGE FROM 25S128W TO 22S139W MOVING E 10 KT.  
 
.RIDGE FROM 25S139W TO 17S144W MOVING E 15 KT.  
 
.RIDGE FROM 25S170W TO 21S157W MOVING E SLOWLY.  
 
.WINDS 20 TO 25 KT FROM 10S TO 08S BETWEEN 166W AND 175W.  
.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 25S TO 10S W OF 178E.  
.48 HOUR FORECAST WINDS 20 TO 25 KT W OF LINE FROM 25S172W TO  
18S180W TO 12S180W.  
   
OTHERWISE
 
WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.  
 
.SEAS 12 TO 15 FT S OF LINE FROM 20S161W TO 21S151W. SEAS 8  
TO 12 FT ELSEWHERE S OF A LINE FROM 19S170W TO 16S162W TO 21S142W  
TO 05S120W. SEAS 8 TO 9 FT S OF 20S BETWEEN 180E AND 170E.  
.24 HOUR FORECAST SEAS 8 TO 10 FT S OF A LINE FROM 25S173W TO  
18S150W TO 23S136W TO 21S130W TO 05S128W TO 01S120W...AND SOUTH OF  
20S BETWEEN 170E AND 180E...AND FROM 18S TO 09S BETWEEN 155W TO  
168W.  
.48 HOUR FORECAST SEAS 12 TO 13 FT IN AN AREA BOUNDED BY 25S165W  
13S174E TO 21S176W TO 20S142W TO 24S131W TO 25S165W... SEAS 8 TO  
10 FT E OF LINE FROM 23S120W TO 12S133W TO 02S120W... SEAS 8 TO 9  
FEET W OF 165E BETWEEN 20S AND 11S.  
   
OTHERWISE
 
SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.  
 
.ISOLATED MODERATE TSTMS FROM 16S TO 10S W OF 178W.  
 

 
 
.FORECASTER SHIGESATO. HONOLULU HI.  
 
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