FPUS65 KTFX 310634 AFPTFX Central and Southwest Montana Area Forecast National Weather Service Great Falls MT 1233 AM MDT Tue Mar 31 2026 MTZ301>314-316>318-011200- Central Montana- National Weather Service Great Falls MT 1233 AM MDT Tue Mar 31 2026 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT FOR Southern Rocky Mountain Front... ...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY MORNING FOR Cascade County below 5000ft...Judith Basin County and Judith Gap...Fergus County below 4500ft...Little Belt and Highwood Mountains...Snowy and Judith Mountains... .REST OF TONIGHT...Partly cloudy. Slight chance of snow in the afternoon. Highs 35 to 45...30 to 40 in the mountains. Lows 15 to 30. .WEDNESDAY...Partly cloudy. Highs 50 to 55...40 to 50 in the mountains. .WEDNESDAY NIGHT...Mostly cloudy. Chance of rain through the night. Slight chance of snow after midnight. Lows 30 to 35. .THURSDAY...Cloudy. Snow and rain. Highs 35 to 45. .FRIDAY...Mostly cloudy. Chance of snow. Lows 25 to 30. Highs 35 to 45. .SATURDAY...Partly cloudy. Lows in the mid 20s. Highs 45 to 55. .SUNDAY...Partly cloudy. Lows around 30. Highs 50 to 55. $$ MTZ315-319>330-011200- Southwest Montana- National Weather Service Great Falls MT 1233 AM MDT Tue Mar 31 2026 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT FOR Upper Blackfoot and MacDonald Pass...Elkhorn and Boulder Mountains...Northwest Beaverhead County... ...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY MORNING FOR Big Belt, Bridger and Castle Mountains...Gallatin and Madison County Mountains and Centennial Mountains... .REST OF TONIGHT...Mostly cloudy. Chance of snow after midnight. Chance of snow showers, rain and slight chance of thunderstorms, then chance of rain and snow. Highs 40 to 50...35 to 45 in the mountains. Lows 20 to 35...15 to 30 in the mountains. .WEDNESDAY...Mostly cloudy. Snow likely through the day. Chance of rain in the afternoon. Highs 45 to 55...40 to 50 in the mountains. .WEDNESDAY NIGHT...Mostly cloudy. Rain and snow. Lows 25 to 35. .THURSDAY...Cloudy. Snow and rain. Highs 35 to 45. West winds around 20 mph with gusts to 35 mph. .FRIDAY...Mostly cloudy. Chance of snow. Lows 20 to 30. Highs 35 to 45. .SATURDAY...Mostly clear. Lows 20 to 25. Highs 45 to 55. .SUNDAY...Partly cloudy. Lows 25 to 30. Highs 50 to 60. $$