825  
FNUS75 KBYZ 201306  
FWSBYZ  
 
SPOT FORECAST FOR N BRIDGERS HANDPILES...USFS  
NATIONAL WEATHER SERVICE BILLINGS MT  
606 AM MST WED NOV 20 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 MST ON NOVEMBER 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
RIDGING OVER THE REGION TODAY WILL KEEP CONDITIONS MILD AND DRY.  
CHANCES FOR PRECIPITATION WILL BEGIN TO INCREASE TONIGHT INTO  
THURSDAY, BUT THERE IS ONLY ABOUT A 10% CHANCE FOR A TENTH AN  
INCH OF WATER. BREEZY SW WINDS WITH GUSTS UP TO 30 MPH ARE  
EXPECTED THURSDAY AFTERNOON.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
CWR.................0 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MAX TEMPERATURE.....34-38.  
MIN HUMIDITY........48-52 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST WINDS 7 TO 10 MPH.  
RIDGETOP...........SOUTHWEST 30 TO 35 MPH.  
MIXING HEIGHT.......INCREASING TO 2300 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST 8 TO 16 MPH.  
HAINES INDEX........2.  
 
TIME (MST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........39 43 39 30 41 36 54 55 53 61  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............18 22 26 31 33 34 35 34 32 29  
RH..............59 57 54 50 53 53 57 61 67 72  
20 FT WIND DIR..S S S SW SW SW SW SW SW SW  
20 FT WIND SPD..7 7 7 7 10 10 10 9 8 8  
20 FT WIND GUST.13 12 12 16 24 25 25 23 22 20  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY WITH A SLIGHT CHANCE OF SNOW.  
CWR.................5 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MIN TEMPERATURE.....24-28.  
MAX HUMIDITY........63-67 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 7 MPH.  
RIDGETOP...........SOUTHWEST 30 TO 35 MPH.  
MIXING HEIGHT.......DECREASING TO 300 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 12 MPH.  
 
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........46 44 41 40 50 50 49 49 53 51 56 71  
WEATHER COV..... SCH SCH SCH  
WEATHER TYPE.... SN SN SN  
TSTM COV........  
TEMP............27 27 28 28 29 29 28 29 29 28 29 30  
RH..............72 71 69 68 63 64 66 65 66 66 66 64  
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW  
20 FT WIND SPD..5 6 6 6 6 6 6 6 6 7 7 7  
20 FT WIND GUST.18 17 17 14 14 14 14 13 12 12 12 12  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY SUNNY. CHANCE OF RAIN/SNOW.  
CWR.................10 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MAX TEMPERATURE.....40-44.  
MIN HUMIDITY........57-61 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 7 MPH.  
RIDGETOP...........SOUTHWEST AROUND 35 TO 40 MPH.  
MIXING HEIGHT.......INCREASING TO 2000 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST 9 TO 16 MPH.  
HAINES INDEX........2.  
 
TIME (MST) 6 AM 9 AM NOON 3 PM  
SKY (%).........65 54 57 79  
WEATHER COV..... CHANCE CHANCE  
WEATHER TYPE....NONE NONE RNSN RAIN  
TSTM COV........  
TEMP............29 36 41 41  
RH..............65 60 60 72  
20 FT WIND......SW 7G18 SW 10G23 SW 10G28 SW 9G30  
 

 
FORECASTER...STETZER/SETZENFAND  
REQUESTED BY...NICK NELSON  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2427036.0/BYZ  
.DELDT 11/20/24  
.FORMATTERVERSION 2.0.0  
.EMAIL NICHOLAS.NELSON@USDA.GOV  
 
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