National Weather Service United States Department of Commerce

Threat of flash flooding continues on Sunday for Southern Plains and Inter-Mountain West

High levels of moisture still remain in portions of the Southern Plains and Inter-Mountain West on Sunday. This will continue the threat of locally heavy rainfall for one more day. Isolated locations could receive 1-2 inches of additional rainfall on Sunday. The areal coverage of these storms should be less than previous days.
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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

Tonight

Clear

Clear

Low: 6 °C

Sunday

Sunny

Sunny

High: 23 °C

Sunday
Night

Mostly Clear

Mostly
Clear

Low: 8 °C

Monday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 28 °C

Monday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 10 °C

Tuesday

Sunny

Sunny

High: 28 °C

Tuesday
Night

Partly Cloudy

Partly
Cloudy

Low: 11 °C

Wednesday

Sunny

Sunny

High: 29 °C

Wednesday
Night

Partly Cloudy

Partly
Cloudy

Low: 12 °C

Detailed Forecast

  • Tonight Clear, with a low around 6. Northeast wind 8 to 14 km/h becoming east southeast after midnight.
  • Sunday Sunny, with a high near 23. East southeast wind 13 to 23 km/h, with gusts as high as 32 km/h.
  • Sunday Night Mostly clear, with a low around 8. Southeast wind 13 to 23 km/h, with gusts as high as 32 km/h.
  • Monday A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 28. South southeast wind 5 to 13 km/h.
  • Monday Night A 20 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 10. Light south wind becoming southwest 6 to 11 km/h after midnight.
  • Tuesday Sunny, with a high near 28.
  • Tuesday Night Partly cloudy, with a low around 11.
  • Wednesday Sunny, with a high near 29.
  • Wednesday Night Partly cloudy, with a low around 12.
  • Thursday Mostly sunny, with a high near 29.
  • Thursday Night A slight chance of showers. Partly cloudy, with a low around 11.
  • Friday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 24.
  • Friday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 8.
  • Saturday A slight chance of showers. Mostly sunny, with a high near 16.