761  
FPUS65 KTFX 171834  
AFPTFX  
 
CENTRAL AND SOUTHWEST MONTANA AREA FORECAST  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
1233 PM MDT THU SEP 17 2026  
 
MTZ301>314-316>318-180000-  
CENTRAL MONTANA-  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
1233 PM MDT THU SEP 17 2026  
 
...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY EVENING THROUGH  
SATURDAY EVENING FOR LITTLE BELT AND HIGHWOOD MOUNTAINS...  
   
REST OF TODAY
 
PARTLY CLOUDY. HIGHS 70 TO 75.    
TONIGHT
 
MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY  
CLOUDY. LOWS 45 TO 55.    
FRIDAY
 
INCREASING CLOUDS. SLIGHT CHANCE OF THUNDERSTORMS IN  
THE EVENING. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL IN THE  
EVENING. HIGHS 70 TO 75...60 TO 70 IN THE MOUNTAINS.    
SATURDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN. LOWS 45 TO 50. HIGHS  
60 TO 70.    
SUNDAY
 
PARTLY CLOUDY. CHANCE OF RAIN. LOWS 45 TO 50. HIGHS  
65 TO 75.    
MONDAY
 
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 70 TO 75.  
 

 
 
MTZ315-319>330-180000-  
SOUTHWEST MONTANA-  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
1233 PM MDT THU SEP 17 2026  
 
...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY EVENING THROUGH  
SATURDAY EVENING FOR BIG BELT, BRIDGER AND CASTLE  
MOUNTAINS...ELKHORN AND BOULDER MOUNTAINS...GALLATIN VALLEY...  
...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH  
SATURDAY AFTERNOON FOR NORTHWEST BEAVERHEAD COUNTY...  
   
REST OF TODAY
 
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. HIGHS 70 TO 80...60 TO 70 IN THE  
MOUNTAINS.    
TONIGHT
 
MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS 40 TO 50.    
FRIDAY
 
MOSTLY CLOUDY. RAIN SHOWERS LIKELY AND CHANCE OF  
THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.  
HIGHS 60 TO 70...55 TO 65 IN THE MOUNTAINS.    
SATURDAY
 
RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS  
40 TO 50. HIGHS 50 TO 60.    
SUNDAY
 
PARTLY CLOUDY. CHANCE OF RAIN. LOWS 40 TO 45. HIGHS  
60 TO 70.    
MONDAY
 
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 65 TO 75.  
 

 
 
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