National Weather Service United States Department of Commerce

A stalled frontal boundary and ample monsoonal moisture will lead to flash flood potential from the Great Basin to the Great Plains tonight and Tuesday

A stalled frontal boundary will set up along the southern and central Rockies for the next couple of days providing focus for showers and thunderstorms. In addition, ample monsoonal moisture will stream in across the southwest bringing enough moisture to introduce a flash flood threat from the Great Basin and Southwest eastward across the central and southern Rockies into the adjacent Plains.
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Current Conditions

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Big Sky MT

7 Day Forecast

For More Weather Information:

Great Falls, MT Local Forecast Office

Tonight

Isolated Thunderstorms Chance for Measurable Precipitation 20%

Isolated
Thunderstorms

Low: 50 °F

Tuesday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 77 °F

Tuesday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 48 °F

Wednesday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 77 °F

Wednesday
Night

Chance Showers Chance for Measurable Precipitation 40%

Chance
Showers

Low: 49 °F

Thursday

Chance Showers Chance for Measurable Precipitation 40%

Chance
Showers

High: 74 °F

Thursday
Night

Chance Showers Chance for Measurable Precipitation 40%

Chance
Showers

Low: 48 °F

Friday

Chance Thunderstorms

Chance
Thunderstorms

High: 75 °F

Friday
Night

Chance Thunderstorms

Chance
Thunderstorms

Low: 47 °F

Detailed Forecast

  • Tonight Isolated showers and thunderstorms before midnight. Partly cloudy, with a low around 50. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 20%.
  • Tuesday A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 77. Light and variable wind.
  • Tuesday Night A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48. Northeast wind around 5 mph becoming calm.
  • Wednesday A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 77. Light and variable wind.
  • Wednesday Night A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 49. Northeast wind around 5 mph becoming southeast after midnight.
  • Thursday A 40 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 74.
  • Thursday Night A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 48.
  • Friday A chance of showers and thunderstorms. Mostly sunny, with a high near 75.
  • Friday Night A chance of showers and thunderstorms. Partly cloudy, with a low around 47.
  • Saturday A chance of showers and thunderstorms. Mostly sunny, with a high near 76.
  • Saturday Night A chance of showers and thunderstorms. Partly cloudy, with a low around 47.
  • Sunday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 78.
  • Sunday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 49.
  • Monday A chance of showers and thunderstorms. Mostly sunny, with a high near 77.