274  
FNUS73 KFSD 241831  
FWSFSD  
 
SPOT FORECAST FOR HORSESHOE BEND...DICKINSON COUNTY CONSERVATION  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
131 PM CDT MON APR 24 2017  
 
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
THE FORECAST HAS BEEN UPDATED FOR WORSENING FIRE WEATHER  
CONDITIONS EXPECTED THE REST OF THE AFTERNOON. THE RELATIVE  
HUMIDITY IS NOT EXPECTED TO IMPROVE THE REMAINDER OF THE AFTERNOON  
WITH VALUES AROUND 25% EXPECTED THROUGH SUNSET. AT THE SAME TIME  
WINDS WILL CONTINUE TO GUST BETWEEN 35 AND 40 MPH THROUGH THE  
REMAINDER OF THE AFTERNOON. WHILE AN ISOLATED SPRINKLE IS POSSIBLE  
THIS AFTERNOON, DRY CONDITIONS ARE MOST LIKELY NEAR THE BURN  
AREA.  
 
TEMPERATURES THIS EVENING WILL REMAIN MILD WITH WINDS DECREASING  
IN SPEED AND GRADUALLY CHANGING TO SOUTHWEST AFTER MIDNIGHT. A  
COLD FRONT WILL MOVE THROUGH LATE TONIGHT SWITCHING THE WINDS TO  
NORTHWEST. MUCH COLDER AIR WILL ACCOMPANY THE FRONT WITH  
WIDESPREAD RAIN MOVING INTO THE AREA BY TUESDAY AFTERNOON.  
   
REST OF TODAY
 
 
MAX TEMPERATURE.....68-73.  
MIN HUMIDITY........23 PERCENT.  
 
TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......MC MC MC MC MC MC MC MC MC MC  
SKY (%).........78 79 81 82 83 83 81 77 73 73  
WEATHER COV..... SCH SCH SCH SCH SCH SCH SCH  
WEATHER TYPE.... RW RW RW RW RW RW RW  
TEMP............50 56 59 61 66 68 70 71 71 70  
DEWPOINT........36 38 39 39 32 32 31 31 32 33  
RH..............58 51 47 43 29 26 23 23 23 25  
20 FT WIND DIR..S S S S S S S S S S  
20 FT WIND SPD..18 25 30 31 31 29 28 28 29 23  
20 FT WIND GUST.25 30 35 40 40 40 40 40 35 35  
SMOKE DISPERSAL.FR GD GD EX EX EX EX EX EX EX  
MIX HGT (KFT)...0.8 1.4 1.9 2.4 2.8 3.3 4.4 5.5 6.6 5.7  
TRANSP WIND DIR.S S S S S S S S S S  
TRANSP WIND SPD.26 35 40 40 39 38 39 40 40 38  
CHC OF PCPN (%).0 10 10 10 10 20 20 20 20 20  
HAINES INDEX....5 5 5 5 5 5 5 4 4 4  
   
TONIGHT
 
 
MIN TEMPERATURE.....41-46.  
MAX HUMIDITY........76 PERCENT.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY COVER.......MCLDY MCLDY MCLDY MCLDY MCLDY MCLDY  
SKY (%).........72 73 74 68 66 67  
WEATHER COV.....S CHC  
WEATHER TYPE....RNSHWR NONE NONE NONE NONE NONE  
TEMP............69 66 61 57 54 51  
DEWPOINT........35 38 42 43 43 43  
RH..............28 36 49 60 67 74  
20 FT WIND......S 20 S 14 S 10 S 8 SSE 6 SSE 2  
20 FT WIND GUST.30 20 15 15 15 5  
SMOKE DISPERSAL.EXCEL FAIR POOR POOR POOR POOR  
MIX HGT (FT)....4800 1200 300 300 300 300  
TRANSPORT WIND..S 35 S 23 S 12 SSW 10 WSW 9 NNW 9  
CHC OF PCPN (%).10 10 10 10 10 10  
HAINES INDEX....4 4 3 4 4 3  
 

 
FORECASTER...SCHUMACHER  
REQUESTED BY...ARIC PING  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1707649.0/FSD  
 
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