681  
FNUS75 KBYZ 210228  
FWSBYZ  
 
SPOT FORECAST FOR NORTH BRIDGERS UNIT 77...FOREST SERVICE  
NATIONAL WEATHER SERVICE BILLINGS MT  
728 PM MST WED NOV 20 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 MST ON NOVEMBER 21.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION  
 
IT WILL BE CLOUDY OVER THE PERIOD WITH REPEATED CHANCES FOR LIGHT  
PRECIPITATION. MOST OF THE PRECIPIATION WILL BE MIXED WITH THE  
POTENTIAL FOR SOME FREEZING DRIZZLE MIXING IN. NO STRONG WINDS ARE  
EXPECTED. HIGH TEMPERATURES NEAR 40 TOMORROW INCREASING TO THE  
MID 40S FRIDAY. MINRH WILL BE IN THE HIGH 50S TODAY INCREASING  
TO THE 60S FRIDAY.  
   
THURSDAY  
 
SKY/WEATHER.........CLOUDY. CHANCE OF RAIN AND SNOW.  
CWR.................10 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MAX TEMPERATURE.....39-43.  
MIN HUMIDITY........55-60 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST 8 TO 10 MPH GUSTING TO 20 MPH  
IN THE AFTERNOON.  
RIDGETOP...........WEST AROUND 35 MPH.  
MIXING HEIGHT.......INCREASING TO 1700 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST 10-15 MPH INCREASING TO 20 MPH IN  
THE AFTERNOON.  
HAINES INDEX........2.  
   
THURSDAY NIGHT  
 
SKY/WEATHER.........CLOUDY. CHANCE OF RAIN AND FREEZING  
PRECIPITATION.  
CWR.................15 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MIN TEMPERATURE.....33-37.  
MAX HUMIDITY........74-78 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST 6 TO 8 MPH GUSTING TO AROUND 15MPH.  
RIDGETOP...........WEST AROUND 30 MPH.  
MIXING HEIGHT.......DECREASING TO 300 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 12 MPH.  
   
FRIDAY  
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF FREEZING PRECIPITATION.  
CWR.................10 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MAX TEMPERATURE.....44-48.  
MIN HUMIDITY........62-66 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTH AROUND 6 TO 8 GUSTING 15-20 MPH IN THE  
AFTERNOON.  
RIDGETOP...........SOUTHWEST AROUND 30 MPH.  
MIXING HEIGHT.......INCREASING TO 1300 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST AROUND 12 MPH INCREASING TO 18 MPH IN THE  
AFTERNOON.  
HAINES INDEX........2.  
 
 
FORECASTER...TORGERSON/PALMQUIST  
REQUESTED BY...ANDRE RAY  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2427121.0/BYZ  
.DELDT 11/20/24  
.FORMATTERVERSION 2.0.0  
.EMAIL ANDRE.RAY@USDA.GOV  
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