431  
FZPS40 PHFO 201006  
HSFSP  
 
HIGH SEAS FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
1130 UTC THU FEB 20 2020  
 
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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 0600 UTC FEB 20 2020.  
24 HOUR FORECAST VALID 0600 UTC FEB 21 2020.  
48 HOUR FORECAST VALID 0600 UTC FEB 22 2020.  
 
.WARNINGS.  
   
..TROPICAL STORM WARNING
 
 
.TROPICAL CYCLONE 09F 13.6S 173.2W 1000 MB MOVING ESE 13 KT. MAXIMUM  
SUSTAINED WINDS 35 KT GUSTS 45 KT. WINDS 34 KT OR GREATER WITHIN  
120 NM NE...SE...SW QUADRANTS OF CENTER. WINDS 20 TO 33 KT ELSEWHERE  
WITHIN 200 NM OF 09F. SEE SEAS BELOW. ISOLATED MODERATE TSTMS WITHIN  
120 NM OF CENTER.  
.24 HOUR FORECAST TROPICAL CYCLONE 09F 15.3S 171.1W 1001 MB.  
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. WINDS 34 KT OR GREATER  
WITHIN 160 NM NE AND SE QUADRANTS...120 NM SW QUADRANT...AND WITHIN  
60 NM NW QUADRANT. WINDS 20 TO 33 KT ELSEWHERE WITHIN 240 NM OF  
CENTER. SEE SEAS BELOW.  
.48 HOUR FORECAST TROPICAL CYCLONE 09F 17.4S 170.1W. MAXIMUM  
SUSTAINED WINDS 70 KT GUSTS 85 KT. WINDS 34 KT OR GREATER WITHIN  
200 NM N AND NE QUADRANTS...AND ELSEWHERE WITHIN 120 NM OF CENTER.  
WINDS 20 TO 33 KT ELSEWHERE WITHIN 240 NM NE SEMICIRCLE...AND  
ELSEWHERE WITHIN 160 NM OF CENTER. WINDS 20 TO 33 KT ELSEWHERE  
WITHIN 300 NM OF CENTER. SEE SEAS BELOW.  
 
FORECAST WINDS NEAR TROPICAL CYCLONE SHOULD BE USED WITH CAUTION  
DUE TO FORECAST UNCERTAINTY.  
 
SEE THE LATEST BULLETIN WTPS11 NFFN ISSUED BY RSMC NADI FOR MORE  
INFORMATION ON T.C. 09F.  
 
.SYNOPSIS AND FORECAST.  
 
.LOW NEAR 10S180E 1004 MB MOVING E 10 KT. WINDS 20 TO 25 KT WITHIN  
100 NM N SEMICIRCLE. SEAS 8 TO 10 FT WITHIN 80 NM N QUADRANT.  
.24 HOUR FORECAST LOW 14S174W 1005 MB. WINDS 20 TO 30 KT WITHIN 160  
NM NE SEMICIRCLE. SEAS 8 TO 11 FT WITHIN 160 NM N QUADRANT. REFER TO  
SEAS BELOW FOR MORE DETAILS.  
.48 HOUR FORECAST LOW 14S171W 1001 MB. WINDS 25 TO 30 KT WITHIN  
60 NM N QUADRANT OF LOW. WINDS 20 TO 25 KT ELSEWHERE WITHIN 160 NM  
NE SEMICIRCLE AND WITHIN 60 NM ELSEWHERE OF CENTER. SEAS 8 TO 12 FT  
WITHIN 110 NM NE QUADRANT. REFER TO SEAS BELOW FOR MORE DETAILS.  
 
.LOW 17S168W 1005 MB MOVING S SLOWLY. TROUGH FROM TROPICAL CYCLONE  
09F TO LOW TO 18S162W TO 25S160W NEARLY STATIONARY. WINDS 20 TO 25 KT  
NE SEMICIRCLE OF CENTER.   
24 HOUR FORECAST LOW 19S169W 1005 MB
 
DISSIPATING. WINDS  
DIMINISHED TO 20 KT OR LESS.  
.48 HOUR FORECAST LOW DISSIPATED.  
 
.LOW NEAR 11S160E 1003 MB NEARLY STATIONARY.  
.24 HOUR FORECAST LOW DISSIPATED.  
   
TROUGH ASSOCIATED WITH LOWS AND T.C. DESCRIBED ABOVE
 
FROM LOW AT  
11S160E TO 10S175E TO LOW AT 10S180E...CONTINUING TO T.C. 09F TO  
LOW AT 17S168W...CONTINUING TO 25S160W...NEARLY STATIONARY.  
.24 HOUR FORECAST TROUGH 11S160E TO 10S165E TO 12S180E TO T.C. 09F  
TO LOW AT 13S174W. TROUGH CONTINUES TO 25S162W.  
.48 HOUR FORECAST TROUGH 10S160E TO 19S178W TO GALE LOW TO T.C.  
09F...CONTINUING TO 25S162W.  
 
.RIDGE FROM 00S164E TO 05S180E TO 15S160W TO 25S149W NEARLY  
STATIONARY.  
   
RIDGE FROM 23S160E TO 25S165E NEARLY STATIONARY
 
WEAKENING.  
   
OTHERWISE
 
WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.  
 
.SEAS 10 TO 14 FT WITHIN 140 NM N OF A LINE FROM 12S176W TO 14S173W.  
SEAS 8 TO 11 FT ELSEWHERE WITHIN 300 NM N OF A LINE FROM 08S164E TO  
13S180E TO 16S170W TO 25S160W.  
.24 HOUR FORECAST SEAS 8 TO 12 FT ELSEWHERE WITHIN 300 NM NE OF A  
LINE FROM 08S172E TO 14S175W TO 20S166W TO 25S163W.  
.48 HOUR FORECAST SEAS 8 TO 12 FT ELSEWHERE IN THE AREA 25S173W TO  
10S174W TO 10S167W TO 25S160W.  
   
OTHERWISE
 
SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.  
 
.SCATTERED MODERATE TO ISOLATED STRONG TSTMS ELSEWHERE WITHIN 400 NM  
N OF A LINE 10S160E TO 08S170E TO 10S180E TO 15S170W.  
 

 
 
.FORECASTER LAU. HONOLULU HI.  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HI Page Main Text Page