717  
FNUS75 KRIW 271100  
FWSRIW  
 
SPOT FORECAST FOR PITCH PINE...BLM  
NATIONAL WEATHER SERVICE RIVERTON WY  
500 AM MDT TUE OCT 27 2020  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON OCTOBER 27.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
DRY WEATHER WILL OCCUR TODAY THROUGH FRIDAY.  
BREEZY CONDITIONS WILL BE COMMON FROM LATE MORNING THROUGH  
THIS EVENING. THE WIND WILL BE SLIGHTLY LESS ON WEDNESDAY.  
THEN BREEZY CONDITIONS LOOK TO RETURN THURSDAY AND FRIDAY.  
MIXING HEIGHTS WILL BE FAIRLY LOW TODAY AND WEDNESDAY WITH  
MAINLY POOR SMOKE DISPERSAL.  
   
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
 
   
..HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT
 
 
FORECASTER...AR  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....29-32.  
MIN HUMIDITY........26-29 PERCENT.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 13 MPH WITH GUSTS TO  
AROUND 15 MPH.  
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......2200 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 13 TO 16 MPH.  
SMOKE DISPERSAL.....POOR.  
 
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........9 11 12 14 15 17 19 20 22 24  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0  
TEMP............8 14 18 23 26 29 30 30 30 30  
RH..............76 73 68 58 46 39 37 38 30 29  
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW  
20 FT WIND SPD..10 12 12 13 13 13 13 12 12 11  
20 FT WIND GUST.14 15 15 16 16 16 16 15 15 14  
MIX HGT (KFT)...0.4 0.5 0.5 0.5 2.2 2.2 2.2 2.1 2.1 2.1  
TRANSP WIND DIR.S S S S SW SW SW SW SW SW  
TRANSP WIND SPD.13 15 15 15 16 16 16 15 15 15  
HAINES INDEX....2 2 2 2 2 2 2 2 2 2  
SDSPL KT-FT/10005 6 6 6 30 30 30 27 27 27  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....23-26.  
MAX HUMIDITY........63-66 PERCENT.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 13 MPH WITH GUSTS TO  
AROUND 15 MPH.  
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTH 14 TO 15 MPH.  
SMOKE DISPERSAL.....POOR.  
 
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........25 25 24 23 22 22 21 23 25 27 28 30  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............28 26 25 25 24 24 24 24 26 26 26 26  
RH..............39 50 57 61 65 66 65 64 63 62 61 62  
20 FT WIND DIR..SW SW SW W W W SW W W W SW SW  
20 FT WIND SPD..11 11 11 11 11 11 12 12 12 13 12 12  
20 FT WIND GUST.14 14 14 14 14 14 15 15 15 16 15 15  
MIX HGT (KFT)...0.9 0.9 0.9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.14 14 14 14 14 14 15 15 15 15 15 15  
HAINES INDEX....2 2 2 2 2 2 2 2 2 2 2 2  
SDSPL KT-FT/100010 10 10 5 5 5 5 5 5 5 5 5  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....36-40.  
MIN HUMIDITY........45-48 PERCENT.  
20-FOOT WINDS.......SOUTHWEST WINDS 9 TO 11 MPH WITH GUSTS AROUND  
14 MPH.  
RIDGE TOP WINDS.....SOUTHWEST 13 TO 17 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......1900 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 13 TO 14 MPH.  
SMOKE DISPERSAL.....POOR.  
 
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........32 31 30 29 28 27 26 27 27 28 28 29  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............25 26 26 29 31 34 36 37 38 38 38 37  
RH..............63 64 65 64 62 59 54 52 51 51 48 48  
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW  
20 FT WIND SPD..11 11 10 10 9 8 8 8 8 9 9 9  
20 FT WIND GUST.14 14 13 13 12 11 11 11 11 12 12 12  
MIX HGT (KFT)...0.4 0.4 0.4 0.3 0.3 0.3 1.6 1.6 1.6 1.9 1.9 1.9  
TRANSP WIND DIR.S S S S S S SW SW SW SW SW SW  
TRANSP WIND SPD.14 14 14 14 14 14 13 13 13 14 14 14  
HAINES INDEX....2 2 2 2 2 2 2 2 2 2 2 2  
SDSPL KT-FT/10004 4 4 4 4 4 17 17 17 23 23 23  
   
FORECAST DAYS 3 THROUGH 5
 
 
   
WEDNESDAY NIGHT
 
 
PARTLY CLOUDY. LOWS IN THE MID 20S.  
WIND GENERALLY LESS THAN 10 MPH.  
   
THURSDAY
 
 
MOSTLY CLEAR. HIGHS IN THE LOWER 40S.  
SOUTHWEST WIND AT 10 TO 20 MPH.  
   
FRIDAY
 
 
PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 40S.  
SOUTHWEST WIND AROUND 12 MPH.  
   
SATURDAY
 
 
MOSTLY CLEAR. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 40S.  
SOUTHWEST WIND AROUND 10 MPH.  
 

 
FORECASTER...ROSS  
REQUESTED BY...JON BISIAR  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2014065.0/RIW  
.DELDT 10/27/20  
.EMAIL JBISIAR@BLM.GOV  
 
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