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Central and Southwest Montana Area Forecast

National Weather Service Great Falls MT

437 PM MDT Sun Aug 23 2026



MTZ301>314-316>318-241200-

Central Montana-

National Weather Service Great Falls MT

437 PM MDT Sun Aug 23 2026



...SEVERE THUNDERSTORM WATCH 617 IN EFFECT UNTIL 7 PM MDT THIS

EVENING FOR Northern Blaine County...Bears Paw Mountains and

Southern Blaine...Judith Basin County and Judith Gap...Fergus

County below 4500ft...Snowy and Judith Mountains...



.TONIGHT...Mostly clear. Slight chance of thunderstorms in the

evening. Some thunderstorms may be severe. Lows 50 to 60...45 to

55 in the mountains. 

.MONDAY...Sunny. Highs 75 to 80...65 to 75 in the mountains. 

.MONDAY NIGHT...Mostly clear. Lows 50 to 55...45 to 50 in the

mountains. 

.TUESDAY...Mostly clear. Highs 75 to 85. 

.WEDNESDAY...Partly cloudy. Lows 50 to 55. Highs 80 to 90. 

.THURSDAY...Partly cloudy. Slight chance of showers. Lows 55 to

60. Highs 85 to 95. 

.FRIDAY...Mostly clear. Lows 50 to 60. Highs 80 to 90. 



$$



MTZ315-319>330-241200-

Southwest Montana-

National Weather Service Great Falls MT

437 PM MDT Sun Aug 23 2026



...SEVERE THUNDERSTORM WATCH 617 IN EFFECT UNTIL 7 PM MDT THIS

EVENING FOR Big Belt, Bridger and Castle Mountains...Missouri

Headwaters...Madison River Valley...Gallatin Valley...Beaverhead

and Western Madison below 6000ft...Ruby Mountains and Southern

Beaverhead Mountains...Gallatin and Madison County Mountains and

Centennial Mountains...



.TONIGHT...Mostly clear. Slight chance of thunderstorms in the

evening. Patchy smoke through the night. Some thunderstorms may

be severe. Lows 45 to 50. 

.MONDAY...Sunny. Patchy smoke. Highs 75 to 85...65 to 75 in the

mountains. 

.MONDAY NIGHT...Mostly cloudy. Patchy smoke in the evening. Lows

45 to 55. 

.TUESDAY...Partly cloudy. Slight chance of showers and

thunderstorms. Highs 70 to 80. 

.WEDNESDAY...Mostly cloudy. Chance of rain showers and slight

chance of thunderstorms. Lows 50 to 55. Highs 75 to 85. 

.THURSDAY...Partly cloudy. Slight chance of showers and

thunderstorms. Lows 50 to 55. Highs 75 to 85. 

.FRIDAY...Partly cloudy. Lows 45 to 55. Highs 75 to 85. 



$$