509  
FPUS65 KTFX 232238  
AFPTFX  
 
CENTRAL AND SOUTHWEST MONTANA AREA FORECAST  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
437 PM MDT SUN AUG 23 2026  
 
MTZ301>314-316>318-241200-  
CENTRAL MONTANA-  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
437 PM MDT SUN AUG 23 2026  
 
...SEVERE THUNDERSTORM WATCH 617 IN EFFECT UNTIL 7 PM MDT THIS  
EVENING FOR NORTHERN BLAINE COUNTY...BEARS PAW MOUNTAINS AND  
SOUTHERN BLAINE...JUDITH BASIN COUNTY AND JUDITH GAP...FERGUS  
COUNTY BELOW 4500FT...SNOWY AND JUDITH MOUNTAINS...  
   
TONIGHT
 
MOSTLY CLEAR. SLIGHT CHANCE OF THUNDERSTORMS IN THE  
EVENING. SOME THUNDERSTORMS MAY BE SEVERE. LOWS 50 TO 60...45 TO  
55 IN THE MOUNTAINS.    
MONDAY...SUNNY. HIGHS 75 TO 80
 
65 TO 75 IN THE MOUNTAINS.    
MONDAY NIGHT...MOSTLY CLEAR. LOWS 50 TO 55
 
45 TO 50 IN THE  
MOUNTAINS.    
TUESDAY
 
MOSTLY CLEAR. HIGHS 75 TO 85.    
WEDNESDAY
 
PARTLY CLOUDY. LOWS 50 TO 55. HIGHS 80 TO 90.    
THURSDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 55 TO  
60. HIGHS 85 TO 95.    
FRIDAY
 
MOSTLY CLEAR. LOWS 50 TO 60. HIGHS 80 TO 90.  
 

 
 
MTZ315-319>330-241200-  
SOUTHWEST MONTANA-  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
437 PM MDT SUN AUG 23 2026  
 
...SEVERE THUNDERSTORM WATCH 617 IN EFFECT UNTIL 7 PM MDT THIS  
EVENING FOR BIG BELT, BRIDGER AND CASTLE MOUNTAINS...MISSOURI  
HEADWATERS...MADISON RIVER VALLEY...GALLATIN VALLEY...BEAVERHEAD  
AND WESTERN MADISON BELOW 6000FT...RUBY MOUNTAINS AND SOUTHERN  
BEAVERHEAD MOUNTAINS...GALLATIN AND MADISON COUNTY MOUNTAINS AND  
CENTENNIAL MOUNTAINS...  
   
TONIGHT
 
MOSTLY CLEAR. SLIGHT CHANCE OF THUNDERSTORMS IN THE  
EVENING. PATCHY SMOKE THROUGH THE NIGHT. SOME THUNDERSTORMS MAY  
BE SEVERE. LOWS 45 TO 50.    
MONDAY...SUNNY. PATCHY SMOKE. HIGHS 75 TO 85
 
65 TO 75 IN THE  
MOUNTAINS.    
MONDAY NIGHT
 
MOSTLY CLOUDY. PATCHY SMOKE IN THE EVENING. LOWS  
45 TO 55.    
TUESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS 70 TO 80.    
WEDNESDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS 50 TO 55. HIGHS 75 TO 85.    
THURSDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS 50 TO 55. HIGHS 75 TO 85.    
FRIDAY
 
PARTLY CLOUDY. LOWS 45 TO 55. HIGHS 75 TO 85.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab MT Page Main Text Page