814  
FNUS73 KFSD 121551  
FWSFSD  
 
SPOT FORECAST FOR ROOKIE CAMP HIKE FY18...YANKTON  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
1051 AM CDT THU JUL 12 2018  
 
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A BREEZY SOUTHWEST WIND WILL CONTINUE THROUGH THE EARLY AFTERNOON  
HOURS. THESE WINDS MAY BEGIN TO TURN SLIGHTLY MORE TO THE SOUTH  
BY MID-LATE AFTERNOON AS A FRONT BEGINS TO MOVE INTO THE REGION.  
SCATTERED THUNDERSTORMS WILL DEVELOP ALONG THIS FRONT IN NORTH  
CENTRAL NEBRASKA BY 4PM, AND MAY BEGIN TO SPREAD CLOUDS EASTWARD  
INTO THE EVENING. THE GREATEST RISK OF THUNDERSTORMS MAY HOLD OFF  
UNTIL LATE EVENING WEST OF YANKTON. RAINS WILL OVERSPREAD THE BURN  
AREA TONIGHT AND CONTINUE INTO FRIDAY. RAINFALL ACCUMULATIONS  
COULD EXCEED 2 INCHES.  
   
REST OF TODAY
 
 
MAX TEMPERATURE.....91-96.  
MIN HUMIDITY........48 PERCENT.  
 
TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......PC PC PC PC PC PC MC  
SKY (%).........37 33 28 35 41 48 56  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 10 10 20  
TEMP............86 89 90 92 93 94 93  
DEWPOINT........70 70 71 71 71 71 71  
RH..............58 55 53 50 48 48 49  
20 FT WIND DIR..SSW SSW SSW SSW SSW S S  
20 FT WIND SPD..7 7 7 8 8 8 8  
20 FT WIND GUST.  
MIX HGT (KFT)...2.3 3.1 4.0 4.5 4.9 5.4 4.6  
TRANSP WIND DIR.SW SSW SSW SSW SSW S S  
TRANSP WIND SPD.12 12 13 14 15 15 15  
HAINES INDEX....5 5 5 5 5 5 5  
SMOKE DISPERSAL.FR FR GD GD GD EX GD  
   
TONIGHT
 
 
MIN TEMPERATURE.....66-71.  
MAX HUMIDITY........97 PERCENT.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY COVER.......MC MC MC MC CDY CDY CDY CDY CDY CDY CDY CDY  
SKY (%).........64 72 79 86 92 94 96 97 98 98 99 99  
WEATHER COV.....CHC CHC LKY LKY DEF DEF DEF DEF DEF DEF DEF LKY  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW  
TSTM COV........CHC CHC LKY LKY DEF DEF DEF DEF DEF DEF DEF LKY  
CHC OF PCPN (%).40 50 60 70 80 80 90 90 90 90 80 70  
TEMP............90 88 85 82 78 74 73 73 72 71 71 70  
DEWPOINT........71 71 71 72 73 71 70 70 69 69 69 69  
RH..............52 57 64 73 84 90 90 90 90 93 93 97  
20 FT WIND DIR..S S SE ENE NNE N NE NE NE N N NNE  
20 FT WIND SPD..8 8 8 8 8 12 10 9 8 7 7 7  
20 FT WIND GUST.9 9 14 12  
MIX HGT (KFT)...3.8 3.0 2.1 1.2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3  
TRANSP WIND DIR.S S SE NE N N NNE NE NE N N NNE  
TRANSP WIND SPD.13 12 12 13 14 13 12 10 9 8 8 8  
HAINES INDEX....5 5 5 5 5 5 5 5 5 5 5 4  
SMOKE DISPERSAL.GD FR FR PR PR PR PR PR PR PR PR PR  
   
FRIDAY
 
 
MAX TEMPERATURE.....76-81.  
MIN HUMIDITY........82 PERCENT.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY COVER.......CLOUDY CLOUDY CLOUDY CLOUDY CLOUDY MCLDY  
SKY (%).........99 98 97 97 91 79  
WEATHER COV.....LIKELY LIKELY LIKELY CHANCE CHANCE S CHC  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........LIKELY LIKELY LIKELY CHANCE CHANCE S CHC  
CHC OF PCPN (%).60 60 60 40 40 20  
TEMP............70 70 71 74 76 77  
DEWPOINT........69 69 70 71 71 72  
RH..............97 97 97 90 85 85  
20 FT WIND......ENE 7 E 7 E 7 ENE 7 ENE 7 ENE 8  
20 FT WIND GUST.  
MIX HGT (FT)....300 400 600 1300 1800 2100  
TRANSPORT WIND..ENE 8 E 9 E 10 ENE 8 ENE 9 NE 13  
HAINES INDEX....4 3 3 3 3 3  
SMOKE DISPERSAL.POOR POOR POOR POOR POOR FAIR  
 

 
FORECASTER...DUX  
REQUESTED BY...PHILOMENA COURNOYER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1812729.0/FSD  
.DELDT 07/12/18  
 
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