542  
FNUS73 KABR 201244  
FWSABR  
 
SPOT FORECAST FOR BLYTHE RX...STATE OF SOUTH DAKOTA  
NATIONAL WEATHER SERVICE ABERDEEN SD  
744 AM CDT SUN APR 20 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 CDT ON APRIL 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
SOUTH TO SOUTHEAST WINDS CAN BE EXPECTED TODAY AT  
THE BURN SITE. BY LATE MORNING INTO EARLY AFTERNOON, GUSTS WILL BE  
FLIRTING WITH 25 MPH. WINDS WILL ACTUALLY BE ON A SLOW DECREASE BY  
LATE AFTERNOON INTO EARLY EVENING. HUMIDITY IS FORECAST TO DROP  
INTO THE 30S BY LATE MORNING, AND EVENTUALLY BOTTOM OUT CLOSE TO  
25 PERCENT BY LATE AFTERNOON.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT).  
CWR.................1 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MAX TEMPERATURE.....AROUND 61.  
MIN HUMIDITY........26 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 12 TO 16 MPH.  
MIXING HEIGHT.......500-6400 FT AGL.  
TRANSPORT WINDS.....SOUTH 15 TO 24 MPH SHIFTING TO THE SOUTHEAST  
AROUND 13 MPH LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (8900 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (86900 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........52 52 54 51 58 57 52 63 73 61  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0  
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0  
TEMP............40 46 50 53 55 57 59 59 59 60  
RH..............55 45 41 37 34 30 28 26 26 26  
20 FT WIND DIR..S S S S S S SE SE SE SE  
20 FT WIND SPD..12 13 14 15 16 15 14 13 12 12  
20 FT WIND GUST.15 16 17 20 23 21 21 20 18 18  
MIX HGT (KFT)...0.5 1.3 2.5 3.3 4.1 5.4 6.2 6.4 6.4 6.2  
SMOKE DISPERSAL.PR PR FR GD GD GD GD GD GD GD  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING  
PARTLY CLOUDY (25-35 PERCENT).  
CWR.................1 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MIN TEMPERATURE.....AROUND 33.  
MAX HUMIDITY........87 PERCENT.  
WIND (20 FT)........EAST WINDS 5 TO 13 MPH SHIFTING TO THE  
NORTHWEST AROUND 6 MPH AFTER 3 AM.  
MIXING HEIGHT.......400-5600 FT AGL.  
TRANSPORT WINDS.....EAST 6 TO 13 MPH SHIFTING TO THE WEST 6 TO 7  
MPH AFTER 3 AM.  
SMOKE DISPERSAL.....GOOD (61800 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (2000 KNOT-FT) LATE IN THE  
NIGHT.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........69 78 77 73 65 56 48 34 26 18 14 12  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............59 57 54 48 45 43 41 40 38 37 35 35  
RH..............27 29 35 46 51 57 65 70 76 79 80 84  
20 FT WIND DIR..SE E E E SE SE E E E NW NW NW  
20 FT WIND SPD..13 12 10 9 8 7 6 5 6 6 6 6  
20 FT WIND GUST.17 17 16 15 13 13 12 10 9 8 8 8  
MIX HGT (KFT)...5.6 4.2 0.9 0.6 0.5 0.5 0.4 0.4 0.4 0.4 0.4 0.4  
SMOKE DISPERSAL.GD FR PR PR PR PR PR PR PR PR PR PR  
   
MONDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MAX TEMPERATURE.....AROUND 67.  
MIN HUMIDITY........27 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS AROUND 5 MPH SHIFTING TO THE  
NORTH EARLY IN THE MORNING, THEN SHIFTING TO  
THE SOUTHEAST EARLY IN THE MORNING SHIFTING TO  
THE EAST 5 TO 6 MPH LATE IN THE MORNING  
SHIFTING TO THE SOUTHEAST 6 TO 8 MPH INCREASING  
TO 9 TO 10 MPH LATE IN THE AFTERNOON.  
MIXING HEIGHT.......400-6600 FT AGL.  
TRANSPORT WINDS.....WEST 5 TO 7 MPH SHIFTING TO THE SOUTHEAST  
AROUND 7 MPH LATE IN THE MORNING, THEN SHIFTING  
TO THE SOUTHWEST 8 TO 13 MPH IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (1800 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (71200 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........10 8 9 11 11 11 10 8 6 6 6 9  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............35 33 37 42 50 53 57 61 63 65 66 66  
RH..............87 84 76 68 52 45 37 31 29 27 27 27  
20 FT WIND DIR..NW N SE E NE E E SE SE SE S SE  
20 FT WIND SPD..5 5 5 5 5 6 6 7 8 8 9 10  
20 FT WIND GUST.7 7 8 8 9 10 9 10 13 13 14 15  
MIX HGT (KFT)...0.4 0.4 0.4 1.0 1.6 2.6 4.0 5.0 5.5 6.2 6.6 6.3  
SMOKE DISPERSAL.PR PR PR PR PR PR PR PR PR FR GD GD  
 

 
FORECASTER...TMT  
REQUESTED BY...BRETT BLANK  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2511086.0/ABR  
.DELDT 04/20/25  
.FORMATTERVERSION 2.0.0  
.EMAIL BRETT.BLANK@STATE.SD.US  
 
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