527  
FNUS75 KBYZ 250207  
FWSBYZ  
 
SPOT FORECAST FOR CASS...DNRC  
NATIONAL WEATHER SERVICE BILLINGS MT  
807 PM MDT FRI JUL 24 2026  
 
FORECAST IS BASED ON FORECAST START TIME OF 2000 MDT ON JULY 24.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
 
...RED FLAG WARNING IN EFFECT FROM NOON SATURDAY TO MIDNIGHT MDT  
SATURDAY NIGHT...  
   
DISCUSSION
 
 
VERY HOT AND MOSTLY DRY CONDITIONS WILL PREVAIL AT THE SITE  
THROUGH THE WEEKEND. THE MAIN CONCERN THROUGH THE FORECAST PERIOD  
WILL BE SHOWERS AND THUNDERSTORMS LATE SATURDAY AFTERNOON AND  
EVENING, CAPABLE OF PRODUCING STRONG AND ERRATIC WIND GUSTS AND  
LIGHTNING. THERE IS A MEDIUM CHANCE FOR WIND GUSTS IN EXCESS OF 60  
MPH. BRIEF HEAVY RAIN CANNOT BE RULED OUT, THOUGH THE CHANCE FOR  
A WETTING RAIN IS LOW. LOOK FOR POOR RELATIVE HUMIDITY RECOVERIES  
TONIGHT AND MODERATE RECOVERIES SATURDAY NIGHT.  
   
REST OF TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.6 PERCENT.  
MIN TEMPERATURE.....69-73.  
MAX HUMIDITY........30-35 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 10 MPH SHIFTING TO THE  
SOUTHEAST 3 TO 7 MPH OVERNIGHT.  
RIDGETOP...........NORTHWEST AROUND 10 MPH BECOMING SOUTHEAST  
UP TO 8 MPH OVERNIGHT.  
MIXING HEIGHT.......DECREASING TO 500 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 9 MPH.  
   
SATURDAY
 
 
SKY/WEATHER.........SUNNY THEN BECOMING PARTLY SUNNY.  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.4 PERCENT.  
MAX TEMPERATURE.....98-102.  
MIN HUMIDITY........10-15 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST BECOMING WEST UP TO 8 MPH IN THE  
AFTERNOON.  
RIDGETOP...........SOUTHEAST BECOMING WEST UP TO 10 MPH.  
MIXING HEIGHT.......INCREASING TO 11600 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.  
   
SATURDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN  
THE EVENING.  
CWR.................LESS THAN 10 PERCENT.  
CHANCE OF LIGHTNING.20 PERCENT.  
MIN TEMPERATURE.....70-74.  
MAX HUMIDITY........46-50 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST WINDS UP TO 5 MPH IN THE EVENING  
BECOMING SOUTH. ERRATIC WIND GUSTS EXPECTED  
NEAR THUNDERSTORMS IN THE EVENING.  
RIDGETOP...........SOUTHWEST AROUND 10 MPH BECOMING SOUTH  
OVERNIGHT.  
MIXING HEIGHT.......DECREASING TO 500 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 12 MPH.  
 

 
FORECASTER...MATOS  
REQUESTED BY...ZACH SNYDER  
TYPE OF REQUEST...WILDFIRE  
.TAG 2618173.0/BYZ  
.DELDT 07/24/26  
.FORMATTERVERSION 2.0.0  
.EMAIL MTBDC@FIRENET.GOV  
 
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