National Weather Service United States Department of Commerce

Severe storms and heavy rain possible from mid-South to Upstate New York on Tuesday

Thunderstorms are expected to develop along and ahead of a cold front from the Tennessee Valley to Upstate New York on Tuesday. The storms will be capable of producing damaging wind gusts and heavy rainfall that could lead to isolated flash flooding.
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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

Mostly Clear

Mostly
Clear

Low: 45 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 73 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 49 °F

Wednesday

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

High: 64 °F

Wednesday
Night

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

Low: 45 °F

Thursday

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

High: 59 °F

Thursday
Night

Partly Cloudy

Partly
Cloudy

Low: 42 °F

Friday

Mostly Sunny

Mostly
Sunny

High: 66 °F

Friday
Night

Partly Cloudy

Partly
Cloudy

Low: 45 °F

Detailed Forecast

  • Tonight Mostly clear, with a low around 45. West wind 6 to 11 mph becoming southwest in the evening.
  • Tuesday Mostly sunny, with a high near 73. West wind 7 to 11 mph.
  • Tuesday Night Mostly clear, with a low around 49. West wind 5 to 8 mph becoming calm after midnight.
  • Wednesday A slight chance of showers between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 64. Breezy, with a light and variable wind becoming west northwest 17 to 22 mph in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 30%.
  • Wednesday Night A chance of showers and thunderstorms before 7pm, then a slight chance of showers. Partly cloudy, with a low around 45. Breezy, with a west northwest wind 16 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
  • Thursday A 20 percent chance of showers before 7am. Mostly sunny, with a high near 59.
  • Thursday Night Partly cloudy, with a low around 42.
  • Friday Mostly sunny, with a high near 66.
  • Friday Night Partly cloudy, with a low around 45.
  • Saturday Mostly sunny, with a high near 71.
  • Saturday Night Partly cloudy, with a low around 48.
  • Sunday Mostly sunny, with a high near 74.
  • Sunday Night Partly cloudy, with a low around 48.
  • Monday Mostly sunny, with a high near 69.