978  
FNUS55 KTFX 311951  
FWFTFX  
 
FIRE WEATHER PLANNING FORECAST FOR NORTH-CENTRAL MONTANA  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
151 PM MDT SUN AUG 31 2025  
   
DISCUSSION
 
 
THIS AFTERNOON THROUGH MONDAY IT WILL BE HOT AND MOSTLY DRY. ON  
TUESDAY THE HI-LINE WILL BE SLIGHTLY COOLER WITH AREAS SOUTH OF  
THE HI-LINE HOT. EACH AFTERNOON TUESDAY THROUGH FRIDAY THERE WILL  
BE ISOLATED RAIN SHOWERS. TUESDAY AFTERNOON AND EVENING THERE  
WILL BE ISOLATED THUNDERSTORMS. THE BIGGEST RISK FROM ANY  
THUNDERSTORM WILL BE FREQUENT LIGHTNING AND GUSTY, ERRATIC WINDS. -IG  
 
MTZ112-011030-  
EASTERN GLACIER/TOOLE/CENTRAL/EASTERN PONDERA/LIBERTY-  
151 PM MDT SUN AUG 31 2025  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. HAZE.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......52-58.  
24 HR TREND......4 DEGREES UP...1 DEGREE DOWN HIGHER ELEVATIONS.  
* MAX HUMIDITY..........55-65 PERCENT.  
24 HR TREND......1 PERCENT UP...12 PERCENT DOWN HIGHER  
ELEVATIONS.  
* WIND (20 FT).  
LOWER ELEVATIONS...NORTH WINDS 5 TO 10 MPH.  
RIDGES.............NORTH WINDS AROUND 5 MPH SHIFTING TO THE  
EAST AFTER MIDNIGHT.  
* MIXING HEIGHT.........10500 FT AGL DECREASING TO 500-1000 FT AGL.  
* TRANSPORT WINDS.......NORTHEAST 15 TO 20 MPH SHIFTING TO THE EAST  
AFTER MIDNIGHT.  
* CWR...................0 PERCENT.  
   
LABOR DAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......84-89...77-82 HIGHER ELEVATIONS.  
24 HR TREND......1 DEGREE UP.  
* MIN HUMIDITY..........17-22 PERCENT.  
24 HR TREND......3 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTHEAST WINDS 5 TO 10 MPH.  
RIDGES.............SOUTHEAST WINDS 5 TO 10 MPH.  
* MIXING HEIGHT.........500-1500 FT AGL INCREASING TO 8000-9500 FT  
AGL.  
* TRANSPORT WINDS.......SOUTHEAST 15 TO 20 MPH.  
* CWR...................0 PERCENT.  
   
MONDAY NIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN  
THE EVENING.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......52-58.  
24 HR TREND......1 DEGREE UP.  
* MAX HUMIDITY..........60-70 PERCENT.  
24 HR TREND......5 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTH WINDS 10 TO 15 MPH.  
RIDGES.............SOUTH WINDS 10 TO 15 MPH.  
* MIXING HEIGHT.........7000 FT AGL DECREASING TO BELOW 1000 FT  
AGL.  
* TRANSPORT WINDS.......SOUTHEAST 15 TO 20 MPH.  
* CWR...................0 PERCENT.  
   
TUESDAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......80-86...73-78 HIGHER ELEVATIONS.  
24 HR TREND......3 DEGREES DOWN.  
* MIN HUMIDITY..........27-35 PERCENT.  
24 HR TREND......9 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...NORTH WINDS 10 TO 15 MPH.  
RIDGES.............NORTH WINDS 10 TO 15 MPH.  
* MIXING HEIGHT.........500-2000 FT AGL INCREASING TO 7000-7500 FT  
AGL.  
* TRANSPORT WINDS.......NORTHWEST 15 TO 20 MPH.  
* CWR...................0 PERCENT.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE  
UPPER 70S. EAST WINDS 10 TO 15 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE  
UPPER 70S. NORTHWEST WINDS 15 TO 20 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID  
70S. EAST WINDS 15 TO 20 MPH.    
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS AROUND  
80.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE  
LOWER 50S. HIGHS IN THE UPPER 70S.  
 

 
 
MTZ113-011030-  
HILL AND BLAINE COUNTIES-  
151 PM MDT SUN AUG 31 2025  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. HAZE IN THE EVENING.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......52-60.  
24 HR TREND......1 DEGREE UP.  
* MAX HUMIDITY..........67-77 PERCENT...52-61 PERCENT HIGHER  
ELEVATIONS.  
24 HR TREND......15 PERCENT DOWN...21 PERCENT DOWN HIGHER  
ELEVATIONS.  
* WIND (20 FT).  
LOWER ELEVATIONS...NORTHWEST WINDS 5 TO 10 MPH.  
RIDGES.............NORTH WINDS 5 TO 10 MPH.  
* MIXING HEIGHT.........8000 FT AGL DECREASING TO 500-2000 FT AGL.  
* TRANSPORT WINDS.......NORTH 10 TO 15 MPH.  
* CWR...................0 PERCENT.  
   
LABOR DAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......83-88...76-81 HIGHER ELEVATIONS.  
24 HR TREND......UNCHANGED.  
* MIN HUMIDITY..........20-25 PERCENT.  
24 HR TREND......11 PERCENT DOWN...3 PERCENT DOWN HIGHER  
ELEVATIONS.  
* WIND (20 FT).  
LOWER ELEVATIONS...NORTHEAST WINDS AROUND 5 MPH.  
RIDGES.............NORTHEAST WINDS AROUND 5 MPH.  
* MIXING HEIGHT.........500-1500 FT AGL INCREASING TO 7500-8000 FT  
AGL.  
* TRANSPORT WINDS.......NORTH 10 TO 15 MPH.  
* CWR...................0 PERCENT.  
   
MONDAY NIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. HAZE AFTER MIDNIGHT.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......54-61.  
24 HR TREND......2 DEGREES UP.  
* MAX HUMIDITY..........64-74 PERCENT...53-61 PERCENT HIGHER  
ELEVATIONS.  
24 HR TREND......5 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...EAST WINDS AROUND 5 MPH.  
RIDGES.............EAST WINDS AROUND 5 MPH.  
* MIXING HEIGHT.........6500 FT AGL DECREASING TO 500-2000 FT AGL.  
* TRANSPORT WINDS.......EAST 15 TO 20 MPH.  
* CWR...................0 PERCENT.  
   
TUESDAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......78-84...73-78 HIGHER ELEVATIONS.  
24 HR TREND......5 DEGREES DOWN.  
* MIN HUMIDITY..........31-41 PERCENT.  
24 HR TREND......11 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...EAST WINDS AROUND 5 MPH SHIFTING TO THE  
NORTH IN THE AFTERNOON.  
RIDGES.............SOUTH WINDS AROUND 5 MPH SHIFTING TO THE  
NORTH IN THE AFTERNOON.  
* MIXING HEIGHT.........500-1500 FT AGL INCREASING TO 4500-6000 FT  
AGL.  
* TRANSPORT WINDS.......SOUTH 15 TO 20 MPH SHIFTING TO THE NORTH IN  
THE AFTERNOON.  
* CWR...................0 PERCENT.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE  
LOWER 70S. NORTHEAST WINDS 10 TO 15 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE  
UPPER 70S. NORTHWEST WINDS 15 TO 20 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER  
70S. NORTHEAST WINDS 15 TO 20 MPH.    
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE MID 40S. HIGHS IN THE  
UPPER 70S.    
SUNDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE  
UPPER 70S.  
 

 
 
MTZ114-011030-  
LEWIS AND CLARK NATIONAL FOREST ROCKY MOUNTAIN DISTRICT-  
ROCKY MOUNTAIN FRONT-  
151 PM MDT SUN AUG 31 2025  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. HAZE THROUGH THE NIGHT.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......52-58.  
24 HR TREND......4 DEGREES UP.  
* MAX HUMIDITY..........54-64 PERCENT...45-54 PERCENT HIGHER  
ELEVATIONS.  
24 HR TREND......1 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...NORTH WINDS AROUND 5 MPH.  
RIDGES.............NORTHEAST WINDS AROUND 5 MPH SHIFTING TO  
THE SOUTHEAST AFTER MIDNIGHT.  
* MIXING HEIGHT.........9500 FT AGL DECREASING TO 1000-1500 FT AGL.  
* TRANSPORT WINDS.......NORTHEAST 10 TO 15 MPH.  
* CWR...................0 PERCENT.  
   
LABOR DAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY. HAZE THROUGH THE DAY. SLIGHT  
CHANCE OF SHOWERS IN THE AFTERNOON.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......83-89...70-80 HIGHER ELEVATIONS.  
24 HR TREND......1 DEGREE UP.  
* MIN HUMIDITY..........17-26 PERCENT.  
24 HR TREND......2 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...NORTHWEST WINDS AROUND 5 MPH SHIFTING TO  
THE EAST IN THE AFTERNOON.  
RIDGES.............SOUTHEAST WINDS 5 TO 10 MPH.  
* MIXING HEIGHT.........1000-2000 FT AGL INCREASING TO 9500-10500  
FT AGL.  
* TRANSPORT WINDS.......SOUTHEAST 10 TO 15 MPH.  
* CWR...................0 PERCENT.  
   
MONDAY NIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. HAZE IN THE EVENING. CHANCE  
OF SHOWERS IN THE EVENING.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......52-58.  
24 HR TREND......2 DEGREES UP.  
* MAX HUMIDITY..........55-65 PERCENT.  
24 HR TREND......4 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...EAST WINDS AROUND 5 MPH SHIFTING TO THE  
WEST AFTER MIDNIGHT.  
RIDGES.............EAST WINDS AROUND 5 MPH SHIFTING TO THE  
SOUTHWEST AFTER MIDNIGHT.  
* MIXING HEIGHT.........7500 FT AGL DECREASING TO 1000-2500 FT AGL.  
* TRANSPORT WINDS.......EAST 15 TO 20 MPH SHIFTING TO THE SOUTHWEST  
AFTER MIDNIGHT.  
* CWR...................0 PERCENT.  
   
TUESDAY
 
 
* SKY/WEATHER...........SUNNY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......82-87...70-80 HIGHER ELEVATIONS.  
24 HR TREND......3 DEGREES DOWN.  
* MIN HUMIDITY..........21-31 PERCENT.  
24 HR TREND......6 PERCENT UP...UNCHANGED HIGHER ELEVATIONS.  
* WIND (20 FT).  
LOWER ELEVATIONS...WEST WINDS 10 TO 15 MPH SHIFTING TO THE  
NORTH IN THE AFTERNOON.  
RIDGES.............WEST WINDS 10 TO 15 MPH SHIFTING TO THE  
NORTH IN THE AFTERNOON.  
* MIXING HEIGHT.........500-1000 FT AGL INCREASING TO 10000-11500  
FT AGL.  
* TRANSPORT WINDS.......NORTHWEST 15 TO 20 MPH.  
* CWR...................0 PERCENT.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE  
UPPER 70S. NORTHEAST WINDS 10 TO 15 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE  
UPPER 70S. NORTH WINDS 10 TO 15 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE MID  
70S. NORTHEAST WINDS 10 TO 15 MPH.    
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE  
UPPER 70S.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE  
LOWER 50S. HIGHS IN THE MID 70S.  
 

 
 
MTZ115-011030-  
CHOUTEAU AND FERGUS COUNTIES-  
151 PM MDT SUN AUG 31 2025  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. HAZE THROUGH THE NIGHT.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......54-60.  
24 HR TREND......4 DEGREES UP.  
* MAX HUMIDITY..........53-63 PERCENT...42-52 PERCENT HIGHER  
ELEVATIONS.  
24 HR TREND......15 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...NORTHEAST WINDS AROUND 5 MPH SHIFTING TO  
THE SOUTHWEST AFTER MIDNIGHT.  
RIDGES.............NORTH WINDS AROUND 5 MPH SHIFTING TO THE  
SOUTHWEST AFTER MIDNIGHT.  
* MIXING HEIGHT.........9000 FT AGL DECREASING TO 500-1000 FT AGL.  
* TRANSPORT WINDS.......NORTHEAST 15 TO 20 MPH SHIFTING TO THE  
SOUTH AFTER MIDNIGHT.  
* CWR...................0 PERCENT.  
   
LABOR DAY
 
 
* SKY/WEATHER...........SUNNY. HAZE IN THE MORNING.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......84-90...75-82 HIGHER ELEVATIONS.  
24 HR TREND......1 DEGREE UP.  
* MIN HUMIDITY..........18-23 PERCENT.  
24 HR TREND......3 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTH WINDS AROUND 5 MPH SHIFTING TO THE  
EAST IN THE AFTERNOON.  
RIDGES.............NORTHEAST WINDS AROUND 5 MPH.  
* MIXING HEIGHT.........500-1500 FT AGL INCREASING TO 7500-8500 FT  
AGL.  
* TRANSPORT WINDS.......EAST 10 TO 15 MPH.  
* CWR...................0 PERCENT.  
   
MONDAY NIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......55-61.  
24 HR TREND......1 DEGREE DOWN.  
* MAX HUMIDITY..........56-66 PERCENT...47-57 PERCENT HIGHER  
ELEVATIONS.  
24 HR TREND......5 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTHEAST WINDS 10 TO 15 MPH.  
RIDGES.............SOUTHEAST WINDS 10 TO 15 MPH.  
* MIXING HEIGHT.........6500 FT AGL DECREASING TO 500-2000 FT AGL.  
* TRANSPORT WINDS.......SOUTHEAST 15 TO 20 MPH.  
* CWR...................0 PERCENT.  
   
TUESDAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......83-88...75-82 HIGHER ELEVATIONS.  
24 HR TREND......3 DEGREES DOWN.  
* MIN HUMIDITY..........24-29 PERCENT.  
24 HR TREND......7 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTH WINDS AROUND 5 MPH SHIFTING TO THE  
NORTH IN THE AFTERNOON.  
RIDGES.............SOUTH WINDS AROUND 5 MPH SHIFTING TO THE  
NORTHWEST IN THE AFTERNOON.  
* MIXING HEIGHT.........500-2000 FT AGL INCREASING TO 4000-5500 FT  
AGL LATE IN THE MORNING, THEN INCREASING TO 7500-9000 FT AGL  
EARLY IN THE AFTERNOON INCREASING TO 9000-9500 FT AGL LATE IN THE  
AFTERNOON DECREASING TO 7500 FT AGL.  
* TRANSPORT WINDS.......SOUTHWEST 15 TO 20 MPH SHIFTING TO THE  
NORTHWEST IN THE AFTERNOON.  
* CWR...................0 PERCENT.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE MID 50S. HIGHS IN THE  
UPPER 70S. NORTHEAST WINDS 10 TO 15 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS AROUND  
80. NORTHWEST WINDS 15 TO 20 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID  
70S. NORTHEAST WINDS 15 TO 20 MPH.    
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS AROUND  
80.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE  
LOWER 50S. HIGHS AROUND 80.  
 

 
 
MTZ116-118-011030-  
LINCOLN RANGER DISTRICT OF THE HELENA NATIONAL FOREST-  
HELENA AND TOWNSEND RANGER DISTRICTS OF THE HELENA NATIONAL  
FOREST-  
151 PM MDT SUN AUG 31 2025  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. HAZE.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......51-59.  
24 HR TREND......4 DEGREES UP.  
* MAX HUMIDITY..........43-53 PERCENT.  
24 HR TREND......9 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...EAST WINDS 10 TO 15 MPH.  
RIDGES.............EAST WINDS AROUND 5 MPH SHIFTING TO THE  
SOUTHEAST AFTER MIDNIGHT.  
* MIXING HEIGHT.........8500 FT AGL DECREASING TO 1000-1500 FT AGL.  
* TRANSPORT WINDS.......EAST 10 TO 15 MPH.  
* CWR...................0 PERCENT.  
   
LABOR DAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY. HAZE.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......82-89...73-82 HIGHER ELEVATIONS.  
24 HR TREND......6 DEGREES UP.  
* MIN HUMIDITY..........15-21 PERCENT.  
24 HR TREND......5 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...EAST WINDS 5 TO 10 MPH.  
RIDGES.............EAST WINDS 5 TO 10 MPH.  
* MIXING HEIGHT.........1000-2000 FT AGL INCREASING TO 11000-11500  
FT AGL.  
* TRANSPORT WINDS.......SOUTHEAST 10 TO 15 MPH.  
* CWR...................0 PERCENT.  
   
MONDAY NIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......52-59.  
24 HR TREND......1 DEGREE DOWN.  
* MAX HUMIDITY..........48-58 PERCENT.  
24 HR TREND......4 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...EAST WINDS 10 TO 15 MPH.  
RIDGES.............EAST WINDS 10 TO 15 MPH SHIFTING TO THE  
SOUTHEAST AFTER MIDNIGHT.  
* MIXING HEIGHT.........9500 FT AGL DECREASING TO 1000 FT AGL.  
* TRANSPORT WINDS.......EAST 20 TO 25 MPH.  
* CWR...................0 PERCENT.  
   
TUESDAY
 
 
* SKY/WEATHER...........SUNNY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......81-89...72-81 HIGHER ELEVATIONS.  
24 HR TREND......3 DEGREES DOWN.  
* MIN HUMIDITY..........18-24 PERCENT.  
24 HR TREND......4 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTH WINDS AROUND 5 MPH SHIFTING TO THE  
NORTH IN THE AFTERNOON.  
RIDGES.............SOUTH WINDS 10 TO 15 MPH SHIFTING TO THE  
NORTH IN THE AFTERNOON.  
* MIXING HEIGHT.........1000-2500 FT AGL INCREASING TO 11500-12000  
FT AGL.  
* TRANSPORT WINDS.......SOUTHWEST 10 TO 15 MPH INCREASING TO  
NORTHWEST 20 TO 25 MPH IN THE AFTERNOON.  
* CWR...................0 PERCENT.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
WEDNESDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS AROUND  
80. NORTH WINDS 10 TO 15 MPH.    
THURSDAY
 
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE UPPER  
70S. NORTH WINDS 10 TO 15 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE MID 70S.  
NORTHEAST WINDS 10 TO 15 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 70S.    
SUNDAY
 
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 70S.  
 

 
 
MTZ117-011030-  
CENTRAL AND EASTERN LEWIS AND CLARK NATIONAL FOREST AREAS-  
151 PM MDT SUN AUG 31 2025  
   
TONIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY. HAZE.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......51-59.  
24 HR TREND......3 DEGREES UP.  
* MAX HUMIDITY..........51-61 PERCENT...41-51 PERCENT HIGHER  
ELEVATIONS.  
24 HR TREND......16 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...NORTHEAST WINDS 10 TO 15 MPH SHIFTING TO  
THE SOUTH AFTER MIDNIGHT.  
RIDGES.............NORTHEAST WINDS 10 TO 15 MPH SHIFTING TO  
THE SOUTH AFTER MIDNIGHT.  
* MIXING HEIGHT.........8500 FT AGL DECREASING TO 1000 FT AGL.  
* TRANSPORT WINDS.......NORTHEAST 10 TO 15 MPH SHIFTING TO THE  
SOUTH AFTER MIDNIGHT.  
* CWR...................0 PERCENT.  
   
LABOR DAY
 
 
* SKY/WEATHER...........MOSTLY SUNNY. HAZE THROUGH THE DAY. SLIGHT  
CHANCE OF SHOWERS IN THE AFTERNOON.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......82-90...72-82 HIGHER ELEVATIONS.  
24 HR TREND......5 DEGREES UP.  
* MIN HUMIDITY..........17-25 PERCENT.  
24 HR TREND......2 PERCENT DOWN.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTH WINDS AROUND 5 MPH SHIFTING TO THE  
EAST IN THE AFTERNOON.  
RIDGES.............EAST WINDS 10 TO 15 MPH.  
* MIXING HEIGHT.........1000 FT AGL INCREASING TO 10000-11000 FT  
AGL.  
* TRANSPORT WINDS.......SOUTHEAST 10 TO 15 MPH.  
* CWR...................0 PERCENT.  
   
MONDAY NIGHT
 
 
* SKY/WEATHER...........PARTLY CLOUDY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MIN TEMPERATURE.......51-59.  
24 HR TREND......1 DEGREE DOWN.  
* MAX HUMIDITY..........52-62 PERCENT.  
24 HR TREND......9 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTHEAST WINDS 10 TO 15 MPH.  
RIDGES.............SOUTHEAST WINDS 10 TO 15 MPH.  
* MIXING HEIGHT.........7000 FT AGL DECREASING TO 1000-2000 FT AGL.  
* TRANSPORT WINDS.......SOUTHEAST 15 TO 20 MPH.  
* CWR...................0 PERCENT.  
   
TUESDAY
 
 
* SKY/WEATHER...........SUNNY.  
* CHANCE LIGHTNING.......0 PERCENT.  
* MAX TEMPERATURE.......82-88...72-81 HIGHER ELEVATIONS.  
24 HR TREND......UNCHANGED.  
* MIN HUMIDITY..........20-26 PERCENT.  
24 HR TREND......4 PERCENT UP.  
* WIND (20 FT).  
LOWER ELEVATIONS...SOUTHWEST WINDS 10 TO 15 MPH SHIFTING TO  
THE NORTHWEST IN THE AFTERNOON.  
RIDGES.............SOUTHWEST WINDS 10 TO 15 MPH SHIFTING TO  
THE NORTHWEST IN THE AFTERNOON.  
* MIXING HEIGHT.........500-1000 FT AGL INCREASING TO 10500-11500  
FT AGL.  
* TRANSPORT WINDS.......SOUTHWEST 15 TO 20 MPH INCREASING TO  
NORTHWEST AROUND 25 MPH IN THE AFTERNOON.  
* CWR...................0 PERCENT.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE  
UPPER 70S. NORTHEAST WINDS 10 TO 15 MPH.    
THURSDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE  
UPPER 70S. NORTHWEST WINDS 15 TO 20 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID  
70S. NORTHEAST WINDS 15 TO 20 MPH.    
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE  
UPPER 70S.    
SUNDAY
 
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE LOWER  
50S. HIGHS IN THE MID 70S.  
 

 
 
WEATHER.GOV/GREATFALLS  
 
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