639  
FZPS40 PHFO 210325  
HSFSP  
 
HIGH SEAS FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
0530 UTC TUE AUG 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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 0000 UTC AUG 21 2018.  
24 HOUR FORECAST VALID 0000 UTC AUG 22 2018.  
48 HOUR FORECAST VALID 0000 UTC AUG 23 2018.  
 
.WARNINGS.  
   
..GALE WARNING.
 
 
.FRONT FROM 25S135W TO 20S143W TO 19S150W TO 16S160W TO 12S160W  
MOVING E 25 KT S OF 21S...AND NEARLY STATIONARY W OF 150W. MAINLY NW  
TO N WINDS 25 TO 35 KT IN AREA BETWEEN FRONT AND LINE FROM 19S138W  
TO 21S131W TO 25S127W. WINDS 20 TO 30 KT S OF 23S BETWEEN 135W AND  
140W. ISOLATED MODERATE TSTMS WITHIN 150 NM NE AND E OF FRONT S OF  
21S.  
.24 HOUR FORECAST FRONT FROM 25S125W TO 20S134W TO 13S150W. MAINLY  
NW TO N WINDS 25 TO 40 KT OVER FORECAST WATERS S OF 20S E OF FRONT.  
NW WINDS 20 TO 25 KT FROM 18S TO 20S BETWEEN FRONT AND 126W.  
.48 HOUR FORECAST FRONT FROM 23S120W TO 17S130W TO 13S147W. NW WINDS  
20 TO 30 KT OVER FORECAST WATERS S OF 18S E OF FRONT.  
 
.SYNOPSIS AND FORECAST.  
   
FRONT FROM 25S177E TO 16S170E TO 10S160E MOVING E 25 KT S OF 20S
 
 
AND NEARLY STATIONARY N OF 15S. WINDS 20 TO 25 KT S OF 23S BETWEEN  
168E AND 178W.  
.24 HOUR FORECAST FRONT FROM 25S175W TO 20S180E TO 15S170E. NW TO N  
WINDS 20 TO 25 KT S OF 23S BETWEEN FRONT AND 172W.  
.48 HOUR FORECAST FRONT FROM 25S172W TO 20S178W. REMNANT TROUGH FROM  
13S160E TO 17S167E TO 21S176E. WINDS EASED TO 20 KT OR LESS.  
 
.TROUGH FROM 01S172E TO 09S176E MOVING W 10 KT. ISOLATED MODERATE  
TSTMS WITHIN 150 NM E...AND 90 NM W...OF TROUGH.  
.24 HOUR FORECAST WEAK TROUGH FROM 02S167E TO 05S174E.  
.48 HOUR FORECAST TROUGH DISSIPATED.  
   
RIDGE FROM 22S120W TO 17S135W TO 12S149W MOVING ENE SLOWLY
 
AND  
GRADUALLY ERODING FROM THE W.  
 
.RIDGE FROM 25S163W TO 20S160W TO 17S156W MOVING E 10 KT.  
   
RIDGE FROM 25S171W TO 16S174E MOVING E 10 KT
 
AND GRADUALLY  
ERODING FROM W.  
   
RIDGE FROM 17S160E TO 16S166E MOVING S 10 KT
 
AND GRADUALLY  
BUILDING TOWARD THE E.  
 
.WINDS 20 KT OR LESS REST OF FORECAST AREA.  
 
.SEAS 12 TO 14 FT S OF 23S W OF 166E. SEAS 8 TO 12 FT ELSEWHERE SW  
OF LINE FROM 18S160E TO 25S176E. SEAS 8 TO 13 FT S OF 22S BETWEEN  
131W AND 143W.  
.24 HOUR FORECAST SEAS 12 TO 17 FT S OF LINE FROM 24S122W TO 21S128W  
TO 21S131W. SEAS 8 TO 12 FT ELSEWHERE S OF LINE FROM 24S120W TO  
19S128W TO 19S137W. SEAS ALSO 8 TO 12 FT SW OF LINE FROM 14S160E TO  
25S180E.  
.48 HOUR FORECAST SEAS 12 TO 14 FT S OF 22S E OF 123W. SEAS 8 TO 12  
FT ELSEWHERE S OF 17S E OF 131W. SEAS 8 TO 11 FT S OF LINE FROM  
17S131W TO 25S141W. SEAS MAINLY 8 TO 10 FT S OF 17S BETWEEN 173E AND  
174W.  
 
.SEAS 8 FT OR LESS REST OF FORECAST AREA.  
 
.ISOLATED MODERATE TSTMS FROM 05S TO 10S BETWEEN 174W AND 178W.  
 

 
 
.FORECASTER KINEL. HONOLULU HI.  
 
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