National Weather Service United States Department of Commerce

Severe weather possible from Upper Midwest across Ohio Valley and into central Appalachians, as well as for parts of Mid-Atlantic and Desert Southwest

Scattered severe thunderstorms are expected to develop Thursday afternoon and evening over parts of the Upper Midwest and Ohio Valley and into the central Appalachians, as well as across parts of the Mid-Atlantic and the Desert Southwest. Damaging wind and large hail will be the main threats for all three areas.
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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

Late
Afternoon

Showers Chance for Measurable Precipitation 80%

Showers

High: 62 °F

Tonight

Showers Chance for Measurable Precipitation 80%

Showers

Low: 50 °F

Friday

Showers Chance for Measurable Precipitation 90%

Showers

High: 60 °F

Friday
Night

Heavy Rain Chance for Measurable Precipitation 100%

Heavy
Rain

Low: 51 °F

Saturday

Heavy Rain Chance for Measurable Precipitation 100%

Heavy
Rain

High: 54 °F

Saturday
Night

Showers Chance for Measurable Precipitation 80%

Showers

Low: 42 °F

Sunday

Chance Showers Chance for Measurable Precipitation 40%

Chance
Showers

High: 61 °F

Sunday
Night

Chance Showers

Chance
Showers

Low: 42 °F

Monday

Chance Thunderstorms

Chance
Thunderstorms

High: 64 °F

Detailed Forecast

  • Late Afternoon Occasional showers and possibly a thunderstorm. High near 62. Northwest wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
  • Tonight Occasional showers and possibly a thunderstorm before 10pm, then scattered showers. Low around 50. Northwest wind 9 to 14 mph becoming light and variable. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
  • Friday Showers, with thunderstorms also possible after 1pm. High near 60. East wind 5 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
  • Friday Night Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 51. East northeast wind 10 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.
  • Saturday Showers. The rain could be heavy at times. High near 54. North northeast wind 5 to 11 mph. Chance of precipitation is 100%.
  • Saturday Night Showers, mainly before 1am. Low around 42. Chance of precipitation is 80%.
  • Sunday A 40 percent chance of showers. Mostly cloudy, with a high near 61.
  • Sunday Night A chance of showers. Mostly cloudy, with a low around 42.
  • Monday A chance of showers and thunderstorms. Partly sunny, with a high near 64.
  • Monday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 45.
  • Tuesday A slight chance of showers. Mostly sunny, with a high near 71.
  • Tuesday Night Partly cloudy, with a low around 46.
  • Wednesday Mostly sunny, with a high near 78.
  • Wednesday Night Partly cloudy, with a low around 52.
  • Thursday Mostly sunny, with a high near 80.