FPUS65 KTFX 212139 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 338 PM MDT Tue Apr 21 2026 MTZ301>314-316>318-221200- Central Montana- National Weather Service Great Falls MT 338 PM MDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY FOR East Glacier Park Region...Northern High Plains... ...HIGH WIND WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON FOR Eastern Toole and Liberty...Hill County...Northern Blaine County...Western and Central Chouteau County...Fergus County below 4500ft... ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT FRIDAY FOR Southern Rocky Mountain Front...Gates of the Mountains... ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT WEDNESDAY NIGHT TO 6 PM MDT THURSDAY FOR Bears Paw Mountains and Southern Blaine... ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON FOR Judith Basin County and Judith Gap...Snowy and Judith Mountains... ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY AFTERNOON FOR Little Belt and Highwood Mountains... .TONIGHT...Mostly cloudy. Lows 45 to 55...40 to 50 in the mountains. .WEDNESDAY...Increasing clouds. Slight chance of thunderstorms in the afternoon. Highs 65 to 75...55 to 65 in the mountains. Southwest winds 20 to 25 mph with gusts to 40 mph in the afternoon. .WEDNESDAY NIGHT...Cloudy, colder. Rain through the night. Snow after midnight. Lows 25 to 35...20 to 30 in the mountains. West winds 20 to 30 mph with gusts to 45 mph. .THURSDAY...Mostly cloudy. Cooler. Chance of snow. Highs 35 to 45. Northwest winds 20 to 30 mph with gusts to 45 mph. .FRIDAY...Mostly cloudy. Chance of snow. Lows 20 to 25. Highs 30 to 40. .SATURDAY...Mostly cloudy. Chance of snow. Lows 20 to 25. Highs 35 to 40. .SUNDAY...Mostly cloudy. Slight chance of snow. Lows 20 to 25. Highs 35 to 45. $$ MTZ315-319>330-221200- Southwest Montana- National Weather Service Great Falls MT 338 PM MDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT FRIDAY FOR Upper Blackfoot and MacDonald Pass...Elkhorn and Boulder Mountains...Northwest Beaverhead County...Ruby Mountains and Southern Beaverhead Mountains... ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY AFTERNOON FOR Big Belt, Bridger and Castle Mountains...Gallatin and Madison County Mountains and Centennial Mountains... ...HIGH WIND WARNING IN EFFECT FROM 3 AM TO 6 PM MDT WEDNESDAY FOR Madison River Valley... ...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY MORNING FOR Gallatin Valley... .TONIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows 35 to 50. .WEDNESDAY...Increasing clouds. Snow with rain likely through the day. Slight chance of thunderstorms in the afternoon. Highs 50 to 60...40 to 50 in the mountains. Southwest winds 20 to 30 mph with gusts to 50 mph. .WEDNESDAY NIGHT...Cloudy, colder. Snow and rain. Lows 30 to 35... 25 to 30 in the mountains. West winds 20 to 25 mph in the evening. Gusts up to 40 mph. .THURSDAY...Cloudy, snow. Highs 35 to 45. Northwest winds around 20 mph with gusts to 35 mph. .FRIDAY...Snow likely. Lows 20 to 25. Highs 25 to 35. .SATURDAY...Mostly cloudy. Slight chance of snow. Lows 15 to 20. Highs 30 to 40. .SUNDAY...Mostly cloudy. Slight chance of snow. Lows 15 to 25. Highs 35 to 45. $$