657  
FNUS73 KABR 061434  
FWSABR  
 
SPOT FORECAST FOR SWIFT BIRD RX...BIA  
NATIONAL WEATHER SERVICE ABERDEEN SD  
934 AM CDT WED SEP 6 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON SEPTEMBER 06.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE IN ABERDEEN SD.  
   
DISCUSSION
 
 
WINDS AT THE BURN SITE WILL BE LIGHT THIS MORNING AND MAY VARY IN  
DIRECTION. ALTHOUGH, IT WILL TEND TO FAVOR A WEST TO NORTHWEST  
DIRECTION BY LATE MORNING. DURING THE AFTERNOON HOURS, WINDS WILL  
BE FAIRLY LIGHT AS WELL AS NOTED IN THE FORECAST BELOW. SKIES  
WILL BE PARTLY CLOUDY TO MOSTLY SUNNY AS RELATIVE HUMIDITY DROPS  
INTO THE 20S BY MID TO LATE AFTERNOON.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT CLOUD).  
MAX TEMPERATURE.....71-76.  
MIN HUMIDITY........25-30 PERCENT.  
WIND (20 FT)........LIGHT AND VARIABLE WINDS, BECOMING NORTHWEST 5  
TO 7 MPH IN THE LATE MORNING.  
CWR.................0 PERCENT.  
LAL.................1.  
MIXING HEIGHT.......1000-2000 FT AGL, INCREASING TO 6400-7100 FT  
AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 4 TO 10 MPH.  
SMOKE DISPERSAL.....POOR (1200-10900), INCREASING TO FAIR  
(57900-60100) IN THE AFTERNOON.  
HAINES INDEX........4 (LOW).  
 
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........26 27 31 34 38 33 28 23 22 22  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............52 58 62 65 67 69 70 72 73 72  
RH..............70 58 48 43 39 35 32 29 27 29  
20 FT WIND DIR..W NW NW NW NW NW NW NW NW N  
20 FT WIND SPD..3 3 5 6 7 7 6 6 6 5  
20 FT WIND GUST.5 5 10 10 10 10 10 10  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT CLOUD).  
MIN TEMPERATURE.....47-52.  
MAX HUMIDITY........75-80 PERCENT.  
WIND (20 FT)........NORTH WINDS AROUND 5 MPH, BECOMING SOUTH EARLY  
IN THE EVENING.  
CWR.................0 PERCENT.  
LAL.................1.  
MIXING HEIGHT.......4500-5000 FT AGL, DECREASING TO 100-600 FT AGL  
IN THE LATE EVENING AND OVERNIGHT.  
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH, BECOMING SOUTH IN THE  
LATE EVENING AND OVERNIGHT.  
SMOKE DISPERSAL.....POOR (1600-30500).  
HAINES INDEX........5 (MODERATE).  
 
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........21 22 23 24 24 23 23 22 22 21 19 18  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............68 63 60 58 56 55 54 53 52 51 50 49  
RH..............34 43 51 57 64 66 69 71 74 77 77 79  
20 FT WIND DIR..N N E SE SE S S S S S S S  
20 FT WIND SPD..5 5 5 5 5 5 5 5 5 5 5 5  
20 FT WIND GUST.  
   
THURSDAY
 
 
SKY/WEATHER.........SUNNY (5-15 PERCENT CLOUD).  
MAX TEMPERATURE.....79-84.  
MIN HUMIDITY........23-28 PERCENT.  
WIND (20 FT)........SOUTH WINDS AROUND 5 MPH EARLY IN THE MORNING,  
BECOMING LIGHT AND VARIABLE, THEN, BECOMING  
WEST AROUND 5 MPH LATE IN THE MORNING, BECOMING  
NORTHWEST, BECOMING NORTHEAST LATE.  
CWR.................0 PERCENT.  
LAL.................1.  
MIXING HEIGHT.......100-600 FT AGL, INCREASING TO 5800-6800 FT AGL  
IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.  
SMOKE DISPERSAL.....POOR (1600-34600).  
HAINES INDEX........5 (MODERATE).  
 
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........16 15 12 11 10 8 7 7 7 7 7 8  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............49 50 56 62 68 72 75 78 80 81 81 80  
RH..............79 80 66 54 43 38 33 29 26 25 26 29  
20 FT WIND DIR..S S S SW SW SW SW SW W W NW NE  
20 FT WIND SPD..5 5 3 3 3 5 5 5 5 5 5 5  
20 FT WIND GUST. 5 5 5  
 

 
FORECASTER...TMT  
REQUESTED BY...LELAND H BLACK  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1715505.0/ABR  
.EMAIL LELAND.BLACK@BIA.GOV  
 
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