877
FNUS55 KTFX 101950
FWFTFX
FIRE WEATHER PLANNING FORECAST FOR NORTH-CENTRAL MONTANA
NATIONAL WEATHER SERVICE GREAT FALLS MT
150 PM MDT THU SEP 10 2026
DISCUSSION
AFTER DRY, WINDY, AND WARM CONDITIONS THIS AFTERNOON A TRANSITION
TO COOLER AND WETTER WILL OCCUR, ESPECIALLY FOR AREAS ALONG AND
NORTH OF THE MONTANA HWY 200 CORRIDOR, BY FRIDAY. A COLD FRONT
WILL BEGIN TO ADVANCE SOUTH FROM CANADA BY THE EVENING HOURS
TONIGHT, WITH THIS FRONT PUSHING SOUTH AND THROUGH THE I-90
CORRIDOR BY THE MID-MORNING HOURS ON FRIDAY. MAIN IMPACT FROM THE
COLD FRONTS PASSAGE WILL BE A WIND SHIFT TO THE NORTH, WITH
INCREASING CHANCES FOR RAIN ALONG AND IN-WAKE OF THE FRONT. WELL
BELOW NORMAL TEMPERATURES WILL OCCUR THROUGH THE WEEKEND ACROSS
ALL FIRE WEATHER ZONES, WITH A BETTER OPPORTUNITY FOR WIDESPREAD
RAINFALL AND MOUNTAIN SNOW ARRIVING ON SUNDAY. - MOLDAN
MTZ112-111030-
EASTERN GLACIER/TOOLE/CENTRAL/EASTERN PONDERA/LIBERTY-
150 PM MDT THU SEP 10 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. CHANCE OF SHOWERS AFTER
MIDNIGHT.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......40-46.
24 HR TREND......8 DEGREES DOWN...13 DEGREES DOWN HIGHER
ELEVATIONS.
* MAX HUMIDITY..........90-100 PERCENT.
24 HR TREND......47 PERCENT UP...39 PERCENT UP HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...WINDY. NORTH WINDS AROUND 25 MPH DECREASING
TO 10 TO 15 MPH AFTER MIDNIGHT.
RIDGES.............NORTH WINDS 20 TO 25 MPH DECREASING TO 10
TO 15 MPH AFTER MIDNIGHT.
* MIXING HEIGHT.........5500 FT AGL DECREASING TO 1000-2000 FT AGL.
* TRANSPORT WINDS.......NORTHWEST AROUND 35 MPH BECOMING NORTHEAST
15 TO 20 MPH AFTER MIDNIGHT.
* CWR...................30 PERCENT.
FRIDAY
* SKY/WEATHER...........PARTLY SUNNY. SHOWERS LIKELY IN THE
MORNING, THEN SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......46-56...39-48 HIGHER ELEVATIONS.
24 HR TREND......21 DEGREES DOWN.
* MIN HUMIDITY..........69-79 PERCENT...82-92 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......37 PERCENT UP...49 PERCENT UP HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTH WINDS 10 TO 15 MPH.
RIDGES.............NORTH WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-3000 FT AGL INCREASING TO 3500-4000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS.......NORTH 15 TO 20 MPH.
* CWR...................20 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN
THE EVENING. CHANCE OF SHOWERS AFTER MIDNIGHT.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......38-43.
24 HR TREND......4 DEGREES DOWN.
* MAX HUMIDITY..........90-100 PERCENT.
24 HR TREND......UNCHANGED.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHEAST WINDS 10 TO 15 MPH.
RIDGES.............NORTHEAST WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........3000-4000 FT AGL DECREASING TO 1500-2000 FT
AGL EARLY IN THE EVENING.
* TRANSPORT WINDS.......NORTH 15 TO 20 MPH.
* CWR...................0 PERCENT.
SATURDAY
* SKY/WEATHER...........MOSTLY CLOUDY. CHANCE OF SHOWERS.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......46-54...39-46 HIGHER ELEVATIONS.
24 HR TREND......2 DEGREES DOWN.
* MIN HUMIDITY..........71-81 PERCENT...83-93 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......2 PERCENT UP.
* WIND (20 FT).
LOWER ELEVATIONS...EAST WINDS 10 TO 15 MPH.
RIDGES.............EAST WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-3000 FT AGL INCREASING TO 3500-4000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS.......EAST 15 TO 20 MPH.
* CWR...................10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
SHOWERS AND SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN THE
UPPER 30S. HIGHS IN THE MID 40S. EAST WINDS 20 TO 25 MPH.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE UPPER
30S. HIGHS IN THE LOWER 50S. WEST WINDS 20 TO 25 MPH.
TUESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE
UPPER 30S. HIGHS IN THE MID 50S. NORTHWEST WINDS 15 TO 20 MPH.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE
UPPER 30S. HIGHS IN THE MID 50S.
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE
LOWER 60S.
MTZ113-111030-
HILL AND BLAINE COUNTIES-
150 PM MDT THU SEP 10 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN
THE EVENING, THEN CHANCE OF SHOWERS AFTER MIDNIGHT.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......45-50...38-46 HIGHER ELEVATIONS.
24 HR TREND......5 DEGREES DOWN.
* MAX HUMIDITY..........81-90 PERCENT.
24 HR TREND......16 PERCENT UP.
* WIND (20 FT).
LOWER ELEVATIONS...NORTH WINDS 15 TO 20 MPH.
RIDGES.............NORTH WINDS 15 TO 20 MPH.
* MIXING HEIGHT.........6000 FT AGL DECREASING TO 1000-2500 FT AGL.
* TRANSPORT WINDS.......NORTHWEST AROUND 30 MPH BECOMING NORTH 20
TO 25 MPH AFTER MIDNIGHT.
* CWR...................10 PERCENT.
FRIDAY
* SKY/WEATHER...........PARTLY SUNNY. CHANCE OF SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......56-62...48-53 HIGHER ELEVATIONS.
24 HR TREND......19 DEGREES DOWN.
* MIN HUMIDITY..........48-58 PERCENT...65-75 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......25 PERCENT UP...38 PERCENT UP HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHWEST WINDS 10 TO 15 MPH.
RIDGES.............NORTHWEST WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-2500 FT AGL INCREASING TO 5000-5500 FT
AGL.
* TRANSPORT WINDS.......NORTHWEST 15 TO 20 MPH.
* CWR...................20 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......37-43...31-41 HIGHER ELEVATIONS.
24 HR TREND......7 DEGREES DOWN.
* MAX HUMIDITY..........85-95 PERCENT.
24 HR TREND......15 PERCENT UP...9 PERCENT UP HIGHER ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHWEST WINDS 15 TO 20 MPH BECOMING NORTH
AROUND 5 MPH AFTER MIDNIGHT.
RIDGES.............NORTH WINDS 10 TO 20 MPH.
* MIXING HEIGHT.........3500-4500 FT AGL DECREASING TO 1000-2000 FT
AGL EARLY IN THE EVENING.
* TRANSPORT WINDS.......NORTH 15 TO 20 MPH.
* CWR...................0 PERCENT.
SATURDAY
* SKY/WEATHER...........MOSTLY CLOUDY.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......53-58...44-49 HIGHER ELEVATIONS.
24 HR TREND......5 DEGREES DOWN.
* MIN HUMIDITY..........51-61 PERCENT...69-79 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......2 PERCENT UP.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHEAST WINDS 5 TO 10 MPH.
RIDGES.............NORTHEAST WINDS 5 TO 10 MPH SHIFTING TO
THE EAST IN THE AFTERNOON.
* MIXING HEIGHT.........1000-2500 FT AGL INCREASING TO 4500-5000 FT
AGL.
* TRANSPORT WINDS.......EAST 15 TO 20 MPH.
* CWR...................0 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
SHOWERS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 50S.
EAST WINDS 20 TO 25 MPH.
MONDAY
WINDY. MOSTLY CLOUDY. SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 50S.
WEST WINDS AROUND 25 MPH.
TUESDAY
MOSTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS AROUND 60.
NORTHWEST WINDS 20 TO 25 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE
LOWER 60S.
THURSDAY
MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE UPPER 60S.
MTZ114-111030-
LEWIS AND CLARK NATIONAL FOREST ROCKY MOUNTAIN DISTRICT-
ROCKY MOUNTAIN FRONT-
150 PM MDT THU SEP 10 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN
THE EVENING, THEN CHANCE OF SHOWERS AFTER MIDNIGHT.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......43-49...37-43 HIGHER ELEVATIONS.
24 HR TREND......9 DEGREES DOWN...4 DEGREES DOWN HIGHER
ELEVATIONS.
* MAX HUMIDITY..........92-100 PERCENT.
24 HR TREND......54 PERCENT UP...26 PERCENT UP HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHWEST WINDS 20 TO 25 MPH BECOMING NORTH
10 TO 15 MPH AFTER MIDNIGHT.
RIDGES.............WINDY. WEST WINDS AROUND 25 MPH.
* MIXING HEIGHT.........5500 FT AGL DECREASING TO 500-1500 FT AGL.
* TRANSPORT WINDS.......NORTHWEST 30 TO 35 MPH.
* CWR...................40 PERCENT.
FRIDAY
* SKY/WEATHER...........MOSTLY CLOUDY. SHOWERS IN THE MORNING, THEN
CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* CHANCE LIGHTNING.......20 PERCENT.
* MAX TEMPERATURE.......48-55...38-47 HIGHER ELEVATIONS.
24 HR TREND......26 DEGREES DOWN...21 DEGREES DOWN HIGHER
ELEVATIONS.
* MIN HUMIDITY..........73-83 PERCENT...86-96 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......73 PERCENT UP.
* WIND (20 FT).
LOWER ELEVATIONS...NORTH WINDS 10 TO 15 MPH.
RIDGES.............NORTH WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-3000 FT AGL INCREASING TO 3500-4000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS.......NORTH 15 TO 20 MPH.
* CWR...................20 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......40-45...34-39 HIGHER ELEVATIONS.
24 HR TREND......3 DEGREES DOWN.
* MAX HUMIDITY..........89-99 PERCENT.
24 HR TREND......UNCHANGED.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHEAST WINDS 10 TO 15 MPH.
RIDGES.............NORTHEAST WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........2000-3500 FT AGL DECREASING TO 1500 FT AGL
LATE IN THE EVENING.
* TRANSPORT WINDS.......NORTHEAST 15 TO 20 MPH.
* CWR...................10 PERCENT.
SATURDAY
* SKY/WEATHER...........MOSTLY CLOUDY. CHANCE OF SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......44-52...36-43 HIGHER ELEVATIONS.
24 HR TREND......3 DEGREES DOWN.
* MIN HUMIDITY..........74-84 PERCENT...88-98 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......6 PERCENT DOWN...UNCHANGED HIGHER ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHEAST WINDS 10 TO 15 MPH.
RIDGES.............EAST WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-3000 FT AGL INCREASING TO 3500 FT AGL
LATE IN THE AFTERNOON.
* TRANSPORT WINDS.......EAST 15 TO 20 MPH.
* CWR...................10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
SHOWERS AND SNOW SHOWERS. LOWS IN THE UPPER 30S. HIGHS
IN THE LOWER 40S. NORTHEAST WINDS 20 TO 25 MPH.
MONDAY
WINDY. MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW SHOWERS
LIKELY. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 50S. WEST WINDS
AROUND 25 MPH.
TUESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE
UPPER 30S. HIGHS IN THE LOWER 50S. NORTH WINDS 10 TO 15 MPH.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE
UPPER 30S. HIGHS IN THE MID 50S.
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE
LOWER 60S.
MTZ115-111030-
CHOUTEAU AND FERGUS COUNTIES-
150 PM MDT THU SEP 10 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. CHANCE OF SHOWERS.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......47-52.
24 HR TREND......2 DEGREES DOWN.
* MAX HUMIDITY..........84-94 PERCENT.
24 HR TREND......30 PERCENT UP.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHWEST WINDS 15 TO 20 MPH.
RIDGES.............NORTHWEST WINDS 15 TO 20 MPH.
* MIXING HEIGHT.........7500 FT AGL DECREASING TO 500-1500 FT AGL.
* TRANSPORT WINDS.......NORTHWEST AROUND 30 MPH BECOMING NORTH 15
TO 20 MPH AFTER MIDNIGHT.
* CWR...................20 PERCENT.
FRIDAY
* SKY/WEATHER...........PARTLY SUNNY. SHOWERS IN THE MORNING, THEN
CHANCE OF SHOWERS IN THE AFTERNOON.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......55-60...49-55 HIGHER ELEVATIONS.
24 HR TREND......25 DEGREES DOWN.
* MIN HUMIDITY..........51-61 PERCENT...61-71 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......42 PERCENT UP.
* WIND (20 FT).
LOWER ELEVATIONS...NORTH WINDS 10 TO 15 MPH.
RIDGES.............NORTH WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-3000 FT AGL INCREASING TO 3500-4500 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS.......NORTH 15 TO 20 MPH.
* CWR...................30 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......41-46.
24 HR TREND......6 DEGREES DOWN.
* MAX HUMIDITY..........78-88 PERCENT.
24 HR TREND......2 PERCENT DOWN.
* WIND (20 FT).
LOWER ELEVATIONS...NORTH WINDS 10 TO 15 MPH.
RIDGES.............NORTH WINDS 10 TO 15 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* MIXING HEIGHT.........3000-4000 FT AGL DECREASING TO 1000-1500 FT
AGL EARLY IN THE EVENING.
* TRANSPORT WINDS.......NORTH 15 TO 20 MPH.
* CWR...................0 PERCENT.
SATURDAY
* SKY/WEATHER...........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN
THE MORNING.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......53-58...47-52 HIGHER ELEVATIONS.
24 HR TREND......3 DEGREES DOWN.
* MIN HUMIDITY..........53-63 PERCENT.
24 HR TREND......1 PERCENT UP...6 PERCENT DOWN HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...EAST WINDS 10 TO 15 MPH.
RIDGES.............EAST WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-3000 FT AGL INCREASING TO 3500-4000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS.......EAST 15 TO 20 MPH.
* CWR...................0 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
WINDY, SHOWERS. LOWS IN THE LOWER 40S. HIGHS IN THE
LOWER 50S. EAST WINDS AROUND 25 MPH.
MONDAY
WINDY. MOSTLY CLOUDY. SHOWERS LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 50S.
WEST WINDS AROUND 25 MPH.
TUESDAY
WINDY. PARTLY CLOUDY. LOWS AROUND 40. HIGHS IN THE
LOWER 60S. NORTHWEST WINDS AROUND 25 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE
LOWER 60S.
THURSDAY
MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE
UPPER 60S.
MTZ116-118-111030-
LINCOLN RANGER DISTRICT OF THE HELENA NATIONAL FOREST-
HELENA AND TOWNSEND RANGER DISTRICTS OF THE HELENA NATIONAL
FOREST-
150 PM MDT THU SEP 10 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF SHOWERS AFTER MIDNIGHT.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......46-51...40-48 HIGHER ELEVATIONS.
24 HR TREND......UNCHANGED...5 DEGREES DOWN HIGHER ELEVATIONS.
* MAX HUMIDITY..........81-91 PERCENT.
24 HR TREND......31 PERCENT UP...50 PERCENT UP HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...WEST WINDS 15 TO 25 MPH.
RIDGES.............WINDY. WEST WINDS 15 TO 25 MPH.
* MIXING HEIGHT.........9000 FT AGL DECREASING TO 500-1000 FT AGL.
* TRANSPORT WINDS.......WEST 30 TO 35 MPH.
* CWR...................10 PERCENT.
FRIDAY
* SKY/WEATHER...........PARTLY SUNNY. CHANCE OF SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON.
* CHANCE LIGHTNING.......20 PERCENT.
* MAX TEMPERATURE.......57-67...47-57 HIGHER ELEVATIONS.
24 HR TREND......20 DEGREES DOWN.
* MIN HUMIDITY..........50-60 PERCENT...64-74 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......35 PERCENT UP...41 PERCENT UP HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHWEST WINDS 15 TO 20 MPH.
RIDGES.............NORTHWEST WINDS 15 TO 20 MPH.
* MIXING HEIGHT.........1000-2500 FT AGL INCREASING TO 4500-5500 FT
AGL.
* TRANSPORT WINDS.......NORTHWEST 20 TO 25 MPH.
* CWR...................10 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......41-46...35-42 HIGHER ELEVATIONS.
24 HR TREND......4 DEGREES DOWN.
* MAX HUMIDITY..........87-97 PERCENT.
24 HR TREND......13 PERCENT UP...UNCHANGED HIGHER ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTH WINDS 15 TO 20 MPH.
RIDGES.............NORTHEAST WINDS 15 TO 20 MPH.
* MIXING HEIGHT.........2000-3500 FT AGL DECREASING TO 1500-2000 FT
AGL IN THE LATE EVENING AND OVERNIGHT.
* TRANSPORT WINDS.......NORTHEAST 20 TO 25 MPH.
* CWR...................0 PERCENT.
SATURDAY
* SKY/WEATHER...........PARTLY SUNNY.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......54-64...44-54 HIGHER ELEVATIONS.
24 HR TREND......2 DEGREES UP.
* MIN HUMIDITY..........48-58 PERCENT...61-71 PERCENT HIGHER
ELEVATIONS.
24 HR TREND......7 PERCENT DOWN.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHEAST WINDS 10 TO 15 MPH.
RIDGES.............NORTHEAST WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........2000-3500 FT AGL INCREASING TO 3500-4000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS.......EAST 15 TO 20 MPH.
* CWR...................0 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
WINDY. MOSTLY CLOUDY WITH SHOWERS, SLIGHT CHANCE OF
THUNDERSTORMS AND SNOW SHOWERS. LOWS IN THE LOWER 40S. HIGHS
AROUND 50. NORTHEAST WINDS AROUND 25 MPH.
MONDAY
WINDY. MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE MID
50S. WEST WINDS AROUND 25 MPH.
TUESDAY
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE UPPER
50S. NORTH WINDS 10 TO 15 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS AROUND
60.
THURSDAY
MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE MID 60S.
MTZ117-111030-
CENTRAL AND EASTERN LEWIS AND CLARK NATIONAL FOREST AREAS-
150 PM MDT THU SEP 10 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. CHANCE OF SHOWERS AFTER
MIDNIGHT.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......42-49.
24 HR TREND......9 DEGREES DOWN.
* MAX HUMIDITY..........84-94 PERCENT.
24 HR TREND......51 PERCENT UP.
* WIND (20 FT).
LOWER ELEVATIONS...WEST WINDS 20 TO 25 MPH BECOMING NORTHWEST
10 TO 15 MPH AFTER MIDNIGHT.
RIDGES.............WEST WINDS 15 TO 25 MPH.
* MIXING HEIGHT.........7500 FT AGL DECREASING TO 500-1500 FT AGL.
* TRANSPORT WINDS.......WEST AROUND 30 MPH BECOMING NORTHWEST 15 TO
20 MPH AFTER MIDNIGHT.
* CWR...................10 PERCENT.
FRIDAY
* SKY/WEATHER...........PARTLY SUNNY. CHANCE OF SHOWERS THROUGH THE
DAY. SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CHANCE LIGHTNING.......20 PERCENT.
* MAX TEMPERATURE.......53-60...47-57 HIGHER ELEVATIONS.
24 HR TREND......26 DEGREES DOWN...21 DEGREES DOWN HIGHER
ELEVATIONS.
* MIN HUMIDITY..........61-71 PERCENT.
24 HR TREND......45 PERCENT UP...56 PERCENT UP HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTH WINDS 15 TO 20 MPH.
RIDGES.............NORTH WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-3000 FT AGL INCREASING TO 3500-5000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS.......NORTHWEST 15 TO 20 MPH.
* CWR...................20 PERCENT.
FRIDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN
THE EVENING. CHANCE OF SHOWERS AFTER MIDNIGHT.
* CHANCE LIGHTNING.......0 PERCENT.
* MIN TEMPERATURE.......37-44.
24 HR TREND......6 DEGREES DOWN.
* MAX HUMIDITY..........86-96 PERCENT.
24 HR TREND......6 PERCENT DOWN...UNCHANGED HIGHER ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...NORTHEAST WINDS 15 TO 20 MPH.
RIDGES.............NORTHEAST WINDS 15 TO 20 MPH.
* MIXING HEIGHT.........2000-3500 FT AGL DECREASING TO 1500 FT AGL
AFTER MIDNIGHT.
* TRANSPORT WINDS.......NORTHEAST 15 TO 20 MPH.
* CWR...................10 PERCENT.
SATURDAY
* SKY/WEATHER...........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN
THE MORNING.
* CHANCE LIGHTNING.......0 PERCENT.
* MAX TEMPERATURE.......52-57...45-53 HIGHER ELEVATIONS.
24 HR TREND......1 DEGREE DOWN.
* MIN HUMIDITY..........55-65 PERCENT.
24 HR TREND......12 PERCENT DOWN...17 PERCENT DOWN HIGHER
ELEVATIONS.
* WIND (20 FT).
LOWER ELEVATIONS...EAST WINDS 10 TO 15 MPH.
RIDGES.............EAST WINDS 10 TO 15 MPH.
* MIXING HEIGHT.........1500-3000 FT AGL INCREASING TO 3500-4000 FT
AGL IN THE AFTERNOON.
* TRANSPORT WINDS.......EAST 15 TO 20 MPH.
* CWR...................0 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY
WINDY. SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS
AROUND 40. HIGHS IN THE LOWER 50S. EAST WINDS AROUND 25 MPH.
MONDAY
VERY WINDY. MOSTLY CLOUDY. SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE MID
50S. WEST WINDS AROUND 35 MPH.
TUESDAY
WINDY. PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN
THE UPPER 50S. NORTHWEST WINDS AROUND 25 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE
UPPER 50S.
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S.
WEATHER.GOV/GREATFALLS
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