095  
FNUS73 KUNR 211433  
FWSUNR  
 
SPOT FORECAST FOR HUTCHINSON RANCH SLASH PILE...PINE RIDGE AGENCY  
NATIONAL WEATHER SERVICE RAPID CITY SD  
733 AM MST THU FEB 21 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 MST ON FEBRUARY 21.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
COLD CONDITIONS WILL PERSIST TODAY AND FRIDAY. A COUPLE OF  
DISTURBANCES WILL BRING AREAS OF LIGHT SNOW FROM THIS AFTERNOON  
INTO FRIDAY NIGHT. THE FIRST SYSTEM THIS AFTERNOON AND TONIGHT WILL BRING  
AROUND 2 INCHES OF SNOW, AND THE SECOND SYSTEM FRIDAY AND FRIDAY NIGHT  
WILL BRING AROUND 1 INCH OF ADDITIONAL ACCUMULATION. DRIER AND MILDER WEATHER  
IS EXPECTED FOR SATURDAY.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SNOW LIKELY IN THE AFTERNOON.  
MAX TEMPERATURE.....AROUND 23.  
MIN HUMIDITY........62 PERCENT.  
WIND (20 FT)........NORTHEAST 5 TO 10 MPH.  
CWR.................30 PERCENT.  
LAL.................1.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......1400 TO 1900 FT AGL.  
TRANSPORT WINDS.....EAST 10 TO 15 MPH.  
SMOKE DISPERSAL.....POOR.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. SNOW LIKELY IN THE EVENING, THEN CHANCE  
OF SNOW OVERNIGHT.  
MIN TEMPERATURE.....AROUND 5 ABOVE.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........NORTHEAST 5 TO 10 MPH.  
CWR.................30 PERCENT.  
LAL.................1.  
HAINES INDEX........2 OR VERY 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.........CLOUDY. SNOW LIKELY IN THE MORNING, THEN CHANCE  
OF SNOW IN THE AFTERNOON.  
MAX TEMPERATURE.....AROUND 19.  
MIN HUMIDITY........74 PERCENT.  
WIND (20 FT)........NORTHEAST 5 TO 10 MPH.  
CWR.................30 PERCENT.  
LAL.................1.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......800 TO 1300 FT AGL.  
TRANSPORT WINDS.....EAST AROUND 10 MPH SHIFTING TO THE SOUTHWEST IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........CLOUDY. CHANCE OF SNOW IN THE EVENING, THEN A  
SLIGHT CHANCE OF SNOW AFTER MIDNIGHT.  
MIN TEMPERATURE.....AROUND 5 ABOVE.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........NORTHEAST AROUND 5 MPH IN THE EVENING, SWITCHING  
TO THE WEST AFTER MIDNIGHT.  
CWR.................10 PERCENT.  
LAL.................1.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......400 TO 900 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.  
SMOKE DISPERSAL.....POOR.  
 

 
FORECASTER...KP  
REQUESTED BY...KYLE GOLUS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1901773.0/UNR  
.DELDT 02/21/19  
.FORMATTERVERSION 1.0.25  
.EMAIL KYLE.GOLUS@BIA.GOV  
 
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