378  
FPUS65 KTFX 180214  
AFPTFX  
 
CENTRAL AND SOUTHWEST MONTANA AREA FORECAST  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
813 PM MDT THU SEP 17 2026  
 
MTZ301>314-316>318-181200-  
CENTRAL MONTANA-  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
813 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 TONIGHT  
MOSTLY CLOUDY EARLY IN THE EVENING THEN  
BECOMING PARTLY CLOUDY. LOWS 45 TO 55.    
FRIDAY...PARTLY CLOUDY. HIGHS 70 TO 75  
60 TO 70 IN THE  
MOUNTAINS.    
FRIDAY NIGHT  
CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE  
OF THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.  
LOWS 45 TO 55.    
SATURDAY  
MOSTLY CLOUDY. RAIN SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.  
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.    
TUESDAY  
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 70 TO 80.  
 
 
 
MTZ315-319>330-181200-  
SOUTHWEST MONTANA-  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
813 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 TONIGHT  
PARTLY CLOUDY EARLY IN THE EVENING THEN  
BECOMING MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS EARLY IN  
THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE NIGHT.  
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. LOWS 40 TO 50.    
FRIDAY  
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.  
SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL. HIGHS 60 TO 70...  
55 TO 65 IN THE MOUNTAINS.    
FRIDAY NIGHT  
CLOUDY. RAIN SHOWERS LIKELY AND CHANCE OF  
THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.  
LOWS 40 TO 50.    
SATURDAY  
CLOUDY. RAIN SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.  
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.    
TUESDAY  
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS 40 TO 50.  
HIGHS 65 TO 75.  
 
 
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