National Weather Service United States Department of Commerce

Severe thunderstorms forecast this evening into tonight

Scattered severe storms with wind and hail will occur this evening and tonight from the central Plains east-northeast to southern Lake Michigan. A cluster of severe storms is possible over the Black Hills region, and more isolated wind and hail storms may occur over interior portions of the Pacific Northwest.
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Current Conditions

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Lewistown MT

7 Day Forecast

For More Weather Information:

Great Falls, MT Local Forecast Office

Today

Severe Thunderstorms Chance for Measurable Precipitation 60%

Severe
Thunderstorms

High: 33 °C

Tonight

Severe Thunderstorms Chance for Measurable Precipitation 50%

Severe
Thunderstorms

Low: 15 °C

Thursday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 26 °C

Thursday
Night

Breezy

Breezy

Low: 8 °C

Friday

Sunny

Sunny

High: 24 °C

Friday
Night

Clear

Clear

Low: 9 °C

Saturday

Sunny

Sunny

High: 25 °C

Saturday
Night

Mostly Clear

Mostly
Clear

Low: 10 °C

Sunday

Sunny

Sunny

High: 27 °C

Detailed Forecast

  • Today Showers and thunderstorms likely, mainly after 3pm. Some storms could be severe, with large hail and damaging winds. Mostly sunny, with a high near 33. East southeast wind 13 to 18 km/h increasing to 19 to 24 km/h in the afternoon. Winds could gust as high as 34 km/h. Chance of precipitation is 60%.
  • Tonight A 50 percent chance of showers and thunderstorms, mainly before midnight. Some storms could be severe, with large hail and damaging winds. Partly cloudy, with a low around 15. Southeast wind 14 to 23 km/h, with gusts as high as 32 km/h.
  • Thursday A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 26. Windy, with a west northwest wind 23 to 33 km/h increasing to 40 to 50 km/h. Winds could gust as high as 70 km/h.
  • Thursday Night Mostly clear, with a low around 8. Breezy, with a west southwest wind 37 to 42 km/h decreasing to 23 to 28 km/h after midnight. Winds could gust as high as 60 km/h.
  • Friday Sunny, with a high near 24. West southwest wind 24 to 32 km/h, with gusts as high as 45 km/h.
  • Friday Night Clear, with a low around 9.
  • Saturday Sunny, with a high near 25.
  • Saturday Night Mostly clear, with a low around 10.
  • Sunday Sunny, with a high near 27.
  • Sunday Night Mostly clear, with a low around 11.
  • Monday Sunny, with a high near 29.
  • Monday Night Partly cloudy, with a low around 12.
  • Tuesday Sunny, with a high near 29.