580  
FNUS73 KUNR 171338  
FWSUNR  
 
SPOT FORECAST FOR RED SCAFFOLD RX...SD-CRA  
NATIONAL WEATHER SERVICE RAPID CITY SD  
738 AM MDT THU SEP 17 2020  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON SEPTEMBER 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
SMOKY SKIES WILL KEEP TEMPERATURES COOLER THAN AVERAGE  
AGAIN TODAY, WITH WARMING TEMPERATURES ON FRIDAY AND SATURDAY. DRY  
WEATHER IS EXPECTED UNTIL SATURDAY NIGHT. WINDS WILL BE EASTERLY,  
BECOMING A BIT BREEZY FRIDAY AFTERNOON.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY. HAZE.  
MAX TEMPERATURE.....AROUND 71.  
MIN HUMIDITY........40 PERCENT.  
WIND (20 FT)........NORTHEAST 5 TO 10 MPH.  
CWR.................0 PERCENT.  
LAL.................1.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......4300 TO 4800 FT AGL.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.  
SMOKE DISPERSAL.....FAIR.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING CLEAR. HAZE.  
MIN TEMPERATURE.....AROUND 44.  
MAX HUMIDITY........96 PERCENT.  
WIND (20 FT)........EAST 5 TO 10 MPH.  
CWR.................0 PERCENT.  
LAL.................1.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......400 TO 900 FT AGL.  
TRANSPORT WINDS.....EAST 10 TO 15 MPH.  
SMOKE DISPERSAL.....POOR.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....AROUND 73.  
MIN HUMIDITY........40 PERCENT.  
WIND (20 FT)........SOUTHEAST 10 TO 15 MPH WITH GUSTS TO AROUND 20  
MPH.  
CWR.................0 PERCENT.  
LAL.................1.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......3400 TO 3900 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 15 TO 25 MPH.  
SMOKE DISPERSAL.....GOOD.  
 

 
FORECASTER...KP  
REQUESTED BY...FUELS SPC  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2012717.0/UNR  
.DELDT 09/17/20  
.FORMATTERVERSION 1.0.26  
.EMAIL LELAND.BLACK@BIA.GOV  
 
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