476  
FNUS75 KBYZ 170044  
FWSBYZ  
 
SPOT FORECAST FOR INC 792 SIOUX PASS...BIA  
NATIONAL WEATHER SERVICE BILLINGS MT  
644 PM MDT THU JUL 16 2026  
 
FORECAST IS BASED ON FORECAST START TIME OF 1900 MDT ON JULY 16.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION  
 
CHANCES FOR SLOW MOVING SHOWERS AND THUNDERSTORMS THIS EVENING  
WITH THE BEST CHANCES OCCURING BETWEEN NOW AND 9 PM. THESE  
THUNDERSTORMS HAVE THE POTENTIAL TO BRING TORRENTIAL RAINFALL AND  
STRONG WINDS. FRIDAY WILL SEE SIMILAR CONDITIONS TO TODAY WITH  
SLIGHTLY HIGHER TEMPERATURES, LOWER MINIMUM RELATIVE HUMIDITY  
VALUES, AND ADDITIONAL CHANCES FOR SLOW MOVING SHOWERS AND  
THUNDERSTORMS. TORGERSON  
   
REST OF TONIGHT  
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.  
CWR.................27 PERCENT.  
CHANCE OF LIGHTNING.37 PERCENT.  
MIN TEMPERATURE.....63-67.  
MAX HUMIDITY........77-81 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......LIGHT WINDS. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS.  
RIDGETOP...........SOUTHEAST AROUND 10 MPH.  
MIXING HEIGHT.......DECREASING TO 500 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 9 MPH.  
   
FRIDAY  
 
SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON.  
CWR.................12 PERCENT.  
CHANCE OF LIGHTNING.15 PERCENT.  
MAX TEMPERATURE.....91-95.  
MIN HUMIDITY........35-39 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 7 MPH INCREASING TO 8 TO 12 MPH  
GUSTING TO 18 MPH IN THE AFTERNOON. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS.  
RIDGETOP...........SOUTHEAST AROUND 20 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......INCREASING TO 9000 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHEAST AROUND 18 MPH.  
 
 
FORECASTER...TORGERSON  
REQUESTED BY...WHITNEY CASEBOLT  
TYPE OF REQUEST...WILDFIRE  
.TAG 2617516.0/BYZ  
.DELDT 07/16/26  
.FORMATTERVERSION 2.0.0  
.EMAIL MTBDC@FIRENET.GOV  
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