423  
FNUS73 KBIS 181501  
FWSBIS  
 
SPOT FORECAST FOR CANNON BALL RX...STANDING ROCK AGENCY  
NATIONAL WEATHER SERVICE BISMARCK ND  
1001 AM CDT THU OCT 18 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON OCTOBER 18.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
EXPECT CLEAR SKIES AND DRY WEATHER THROUGH FRIDAY ACROSS ALL OF  
WESTERN AND CENTRAL NORTH DAKOTA. TODAY WILL BE WARM, WITH HIGHS  
IN THE LOWER 70S AT THE BURN SITE WITH MINIMUM AFTERNOON RELATIVE  
HUMIDITY VALUES AROUND 30 PERCENT. DESPITE THE LOW RELATIVE HUMIDITY  
VALUES THIS AFTERNOON, SOUTHERLY WINDS WILL NOT BE STRONG ENOUGH TO  
CREATE FIRE WEATHER CONCERNS. EXPECT SOUTHERLY WINDS BETWEEN 5 AND 10  
MPH THIS AFTERNOON.  
 
A COLD FRONT WILL MOVE THROUGH LATER TONIGHT. ALTHOUGH NO PRECIPITATION  
IS EXPECTED WITH THIS FRONT, IT WILL HELP CREATE WINDY CONDITIONS  
TOMORROW AFTERNOON. EXPECT SUSTAINED NORTHWEST WINDS BETWEEN 15 AND 20 MPH  
TOMORROW, WITH GUSTS UP TO 30 MPH. DESPITE THE WINDY CONDITIONS, TOMORROW  
WILL BE MUCH COOLER WITH HIGHER RELATIVE HUMIDITY VALUES. THEREFORE, NO  
FIRE WEATHER CONCERNS ARE EXPECTED TOMORROW EITHER.  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY.  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....AROUND 71.  
MIN HUMIDITY........30 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 10 MPH.  
MIXING HEIGHT.......200-2000 FT AGL INCREASING TO 2700-3800 FT AGL  
EARLY IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST 12 TO 17 MPH.  
SMOKE DISPERSAL.....POOR TO GOOD (2300-44400 KNOT-FT) INCREASING TO  
GOOD (40800 KNOT-FT) LATE IN THE AFTERNOON.  
HAINES INDEX........4 TO 5 OR (LOW) TO (MODERATE).  
 
TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........4 3 3 3 3 2 2 2  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0  
CHC OF PCPN (%).0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1  
TEMP............44 51 59 65 69 71 71 68  
RH..............76 59 45 37 32 30 30 32  
20 FT WIND DIR..S S S S S S S S  
20 FT WIND SPD..6 7 8 9 10 10 10 9  
20 FT WIND GUST.9 10 11 12 13 13 13 12  
MIX HGT (KFT)...0.2 0.7 1.3 2.0 2.7 3.2 3.8 3.1  
TRANSP WIND DIR.S S S S S S S SW  
TRANSP WIND SPD.12 12 13 14 16 16 17 15  
HAINES INDEX....5 5 4 4 4 4 4 4  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....AROUND 41.  
MAX HUMIDITY........86 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS UP TO 7 MPH IN THE EVENING  
BECOMING LIGHT, THEN BECOMING NORTHWEST UP TO 6  
MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......0-600 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 8 TO 17 MPH.  
SMOKE DISPERSAL.....POOR (100 KNOT-FT).  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........2 2 1 1 2 2 3 3 3 5 8 14  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............65 62 58 54 52 49 48 46 45 44 44 42  
RH..............37 50 57 66 71 77 80 83 83 86 82 86  
20 FT WIND DIR..S S S S SW SW SW W W W NW NW  
20 FT WIND SPD..7 5 5 5 5 4 4 5 5 6 6 6  
20 FT WIND GUST.10 6 6 6 6 5 5 6 6 7 7 9  
MIX HGT (KFT)...0.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1  
TRANSP WIND DIR.SW SW W W W W NW NW NW NW NW NW  
TRANSP WIND SPD.13 9 8 8 9 10 12 12 14 14 16 17  
HAINES INDEX....4 4 4 4 4 4 4 4 4 4 4 4  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....AROUND 58.  
MIN HUMIDITY........39 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 15 TO 20 MPH. GUSTS TO 30 MPH.  
MIXING HEIGHT.......0-1400 FT AGL INCREASING TO 3900-5800 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 18 TO 26 MPH.  
SMOKE DISPERSAL.....POOR TO GOOD (300-45300 KNOT-FT) INCREASING TO  
EXCELLENT (79900 KNOT-FT).  
HAINES INDEX........3 TO 5 OR (VERY LOW) TO (MODERATE).  
 
TIME (CDT) 6 AM 9 AM NOON 3 PM  
SKY (%).........20 25 10 6  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0  
CHC OF PCPN (%).0 0 0 0  
LAL.............1 1 1 1  
TEMP............41 43 52 58  
RH..............86 79 56 40  
20 FT WIND......NW 7G10 NW 13G15 NW 16G25 NW 19G30  
MIX HGT (FT)....BLW100 600 3900 5500  
TRANSPORT WIND..NW 18 NW 18 NW 22 NW 26  
HAINES INDEX....5 4 4 4  
 

 
FORECASTER...KRANZ  
REQUESTED BY...TERRANCE J. HODGKISS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1817053.0/BIS  
.DELDT 10/18/18  
.EMAIL TERRANCE.HODGKISS@BIA.GOV  
 
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