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

Overnight

Mostly Clear

Mostly
Clear

Low: 45 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 74 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 48 °F

Wednesday

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

High: 64 °F

Wednesday
Night

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

Low: 43 °F

Thursday

Mostly Sunny

Mostly
Sunny

High: 61 °F

Thursday
Night

Partly Cloudy

Partly
Cloudy

Low: 42 °F

Friday

Sunny

Sunny

High: 69 °F

Friday
Night

Partly Cloudy

Partly
Cloudy

Low: 46 °F

Detailed Forecast

  • Overnight Mostly clear, with a low around 45. Southwest wind around 7 mph.
  • Tuesday Mostly sunny, with a high near 74. West wind 5 to 10 mph.
  • Tuesday Night Mostly clear, with a low around 48. Light and variable wind becoming east southeast 5 to 8 mph in the evening.
  • Wednesday A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 64. Breezy, with a west northwest wind 8 to 13 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 30%.
  • Wednesday Night A 20 percent chance of showers. Partly cloudy, with a low around 43. Breezy, with a west northwest wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 31 mph.
  • Thursday Mostly sunny, with a high near 61.
  • Thursday Night Partly cloudy, with a low around 42.
  • Friday Sunny, with a high near 69.
  • Friday Night Partly cloudy, with a low around 46.
  • Saturday Mostly sunny, with a high near 71.
  • Saturday Night Partly cloudy, with a low around 48.
  • Sunday Mostly sunny, with a high near 75.
  • Sunday Night Partly cloudy, with a low around 49.
  • Monday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 72.