FPUS65 KTFX 212300 SFPMT State Forecast For Montana National Weather Service Great Falls MT 500 PM MDT Tue Apr 21 2026 MTZ001>007-043-221000- West of the Continental Divide- National Weather Service Missoula MT 500 PM MDT Tue Apr 21 2026 .TONIGHT...Mostly cloudy. Lows in the 40s. .WEDNESDAY...Rain showers likely and a slight chance of thunderstorms. Highs in the upper 50s to mid 60s. .WEDNESDAY NIGHT...Rain and snow likely. Lows in the 30s. .THURSDAY...Rain and snow likely in the morning, then snow showers likely and a chance of rain in the afternoon and evening. Highs in the 40s to lower 50s. .FRIDAY...Mostly cloudy with a chance of snow. Lows in the 20s. Highs in the 40s. .SATURDAY...Mostly cloudy. Lows 19 to 26. Highs in the 40s to lower 50s. .SUNDAY...Mostly cloudy. Lows in the 20s. Highs in the mid 40s to lower 50s. $$ MTZ301>314-316>318-221000- Central Montana- National Weather Service Great Falls MT 500 PM MDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY FOR East Glacier Park Region...Northern High Plains... ...HIGH WIND WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON FOR Eastern Toole and Liberty...Hill County...Northern Blaine County...Western and Central Chouteau County...Fergus County below 4500ft... ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT FRIDAY FOR Southern Rocky Mountain Front...Gates of the Mountains... ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT WEDNESDAY NIGHT TO 6 PM MDT THURSDAY FOR Bears Paw Mountains and Southern Blaine... ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON FOR Judith Basin County and Judith Gap...Snowy and Judith Mountains... ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY AFTERNOON FOR Little Belt and Highwood Mountains... .TONIGHT...Mostly cloudy. Lows 45 to 55...40 to 50 in the mountains. .WEDNESDAY...Increasing clouds. Slight chance of thunderstorms in the afternoon. Highs 65 to 75...55 to 65 in the mountains. Southwest winds 20 to 25 mph with gusts to 40 mph in the afternoon. .WEDNESDAY NIGHT...Cloudy, colder. Rain through the night. Snow after midnight. Lows 25 to 35...20 to 30 in the mountains. West winds 20 to 30 mph with gusts to 45 mph. .THURSDAY...Mostly cloudy. Cooler. Chance of snow. Highs 35 to 45. Northwest winds 20 to 30 mph with gusts to 45 mph. .FRIDAY...Mostly cloudy. Chance of snow. Lows 20 to 25. Highs 30 to 40. .SATURDAY...Mostly cloudy. Chance of snow. Lows 20 to 25. Highs 35 to 40. .SUNDAY...Mostly cloudy. Slight chance of snow. Lows 20 to 25. Highs 35 to 45. $$ MTZ315-319>330-221000- Southwest Montana- National Weather Service Great Falls MT 500 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. $$ MTZ016>027-059>062-221000- Northeast Montana- National Weather Service Glasgow MT 500 PM MDT Tue Apr 21 2026 ...HIGH WIND WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY EVENING... .TONIGHT...Mostly cloudy. Lows in the lower to mid 50s. .WEDNESDAY...Mostly cloudy. A slight chance of showers in the afternoon. Highs in the mid to upper 80s. .WEDNESDAY NIGHT...Mostly cloudy with a chance of rain showers. Lows in the mid 30s to lower 40s. .THURSDAY...Rain and snow showers in the morning, then a chance of rain and snow showers in the afternoon and evening. Highs in the mid 40s to lower 50s. .FRIDAY...Mostly cloudy with a chance of snow showers. Highs near 40. Lows in the mid to upper 20s. .SATURDAY...Mostly cloudy with a slight chance of snow showers. Highs in the upper 30s to mid 40s. Lows in the lower to mid 20s. .SUNDAY...Mostly cloudy with a slight chance of snow showers. Highs in the lower to mid 40s. Lows in the lower to mid 20s. $$ MTZ028>042-056>058-063>068-221000- South Central and Southeast Montana- National Weather Service Billings MT 500 PM MDT Tue Apr 21 2026 ...Winter Storm Watch in effect from Wednesday evening through late Thursday night for portions of South Central Montana... .TONIGHT...Mostly cloudy. Lows in the upper 40s to mid 50s. .WEDNESDAY...Mostly sunny. Slight chance of rain showers. Highs from the upper 60s west to the upper 80s east. .WEDNESDAY NIGHT...Mostly cloudy. Patchy blowing snow. Chance of rain showers. Lows in the mid 30s to the mid 40s. .THURSDAY...Patchy blowing snow west...and snow showers with showers likely west...and showers likely and chance of snow showers east. Highs in the mid 40s to the mid 50s. .THURSDAY NIGHT...Mostly cloudy. Patchy blowing snow west...and chance of snow showers west...and slight chance of showers and snow showers east. Lows in the mid 20s to the mid 30s. .FRIDAY...Mostly cloudy. Patchy blowing snow. Chance of snow showers. Highs in the upper 30s to the upper 40s. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Mostly cloudy. Slight chance of snow showers. Lows in the upper teens to the upper 20s. Highs in the lower 40s to around 50. .SUNDAY...Partly sunny. Chance of snow showers. Highs in the lower 40s to the lower 50s. $$