521  
FNUS73 KFSD 061539  
FWSFSD  
 
SPOT FORECAST FOR DEWEYS PATURE TRUMBULL BOAT RAMP...IOWA DNR  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
1039 AM CDT TUE APR 6 2021  
 
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A FEW ISOLATED SHOWERS AND WEAK THUNDERSTORMS ARE POSSIBLE AS  
EARLY AS 1 PM CDT TODAY (TUE); HOWEVER, CHANCES FOR WIDESPREAD  
RAIN SHOWERS AND SCATTERED THUNDERSTORMS INCREASE NOTABLY AFTER 6  
PM CDT AND CONTINUE THROUGH THE FIRST HALF OF THE OVERNIGHT.  
SURFACE WINDS WILL BE EAST TO NORTHEASTERLY, GUSTING TO 20 TO 25  
BY THIS AFTERNOON. WINDS SLOWLY TURN TO NORTHERLY BY WEDNESDAY  
EVENING.  
   
REST OF TODAY
 
 
MAX TEMPERATURE.....70-75.  
MIN HUMIDITY........51 PERCENT.  
 
TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......MC MC MC MC MC MC MC  
SKY (%).........59 65 69 75 84 80 73  
WEATHER COV.....SCH SCH CHC CHC CHC CHC CHC  
WEATHER TYPE....RW RW RW RW RW RW RW  
TSTM COV........SCH SCH CHC CHC CHC CHC CHC  
CHC OF PCPN (%).20 20 30 30 30 40 40  
TEMP............64 68 70 72 72 73 73  
DEWPOINT........48 50 52 53 53 53 53  
RH..............57 58 57 55 53 51 51  
20 FT WIND DIR..E ESE ESE SE SE SE SE  
20 FT WIND SPD..8 9 10 12 14 15 15  
20 FT WIND GUST. 17 18 20 22 23 23  
MIX HGT (KFT)...1.9 2.4 3.0 3.3 3.3 3.8 4.0  
TRANSP WIND DIR.E SE SE SE S S S  
TRANSP WIND SPD.13 14 16 17 18 21 22  
HAINES INDEX....4 4 3 3 3 3 3  
SMOKE DISPERSAL.FR FR GD GD GD GD EX  
   
TONIGHT
 
 
MIN TEMPERATURE.....53-58.  
MAX HUMIDITY........93 PERCENT.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY COVER.......MCLDY MCLDY CLOUDY CLOUDY CLOUDY CLOUDY  
SKY (%).........76 87 100 99 90 93  
WEATHER COV.....CHANCE LIKELY LIKELY LIKELY DEFNTE DEFNTE  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........CHANCE CHANCE CHANCE CHANCE CHANCE CHANCE  
CHC OF PCPN (%).50 60 70 70 80 80  
TEMP............72 67 63 60 59 58  
DEWPOINT........54 55 57 56 56 56  
RH..............57 68 81 87 90 93  
20 FT WIND......SE 14 SE 12 ESE 12 SE 10 SE 10 ESE 10  
20 FT WIND GUST.21 18 17 17 17 17  
MIX HGT (FT)....3100 1400 700 1100 800 900  
TRANSPORT WIND..S 20 S 18 SE 14 S 17 SE 12 SE 13  
HAINES INDEX....3 4 4 4 4 4  
SMOKE DISPERSAL.GOOD FAIR POOR FAIR POOR POOR  
   
WEDNESDAY
 
 
MAX TEMPERATURE.....60-65.  
MIN HUMIDITY........78 PERCENT.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY COVER.......CLOUDY CLOUDY CLOUDY CLOUDY CLOUDY CLOUDY  
SKY (%).........94 92 88 88 89 89  
WEATHER COV.....LIKELY LIKELY CHANCE CHANCE LIKELY DEFNTE  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........CHANCE S CHC S CHC S CHC CHANCE CHANCE  
CHC OF PCPN (%).70 60 50 50 60 80  
TEMP............57 58 60 62 61 60  
DEWPOINT........55 57 57 56 55 54  
RH..............93 96 90 81 81 81  
20 FT WIND......ESE 10 ESE 9 E 9 SE 10 S 12 NW 9  
20 FT WIND GUST.16 16 17 17 18 21  
MIX HGT (FT)....700 800 1400 1800 1300 1300  
TRANSPORT WIND..SE 8 S 12 SSE 7 S 13 W 14 N 15  
HAINES INDEX....4 3 3 3 4 4  
SMOKE DISPERSAL.POOR POOR POOR FAIR FAIR FAIR  
 

 
FORECASTER...VANDENBOOGART  
REQUESTED BY...TANNER VENTEICHER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2108028.1/FSD  
.DELDT 04/06/21  
.FORMATTERVERSION 1.0.25  
 
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