National Weather Service United States Department of Commerce

Developing storm will spread rain across eastern U.S.; thunderstorms in the Southeast

A storm system developing in the South will move up the Mississippi River Valley on Sunday bringing rainfall to much of the eastern U.S., along with thunderstorms in the southeastern states. Some of the thunderstorms in the Southeast could produce large hail, damaging wind and heavy rain.
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11 Miles NNE Helena MT

7 Day Forecast

For More Weather Information:

Great Falls, MT Local Forecast Office

Today

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

High: 38 °F

Tonight

Chance Snow Chance for Measurable Precipitation 30%

Chance
Snow

Low: 24 °F

Monday

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

High: 37 °F

Monday
Night

Chance Snow Chance for Measurable Precipitation 30%

Chance
Snow

Low: 21 °F

Tuesday

Rain/Snow Likely Chance for Measurable Precipitation 60%

Rain/Snow
Likely

High: 40 °F

Tuesday
Night

Snow Chance for Measurable Precipitation 90%

Snow

Low: 28 °F

Wednesday

Rain/Snow Likely Chance for Measurable Precipitation 60%

Rain/Snow
Likely

High: 39 °F

Wednesday
Night

Snow Likely

Snow
Likely

Low: 21 °F

Thanksgiving
Day

Chance Snow

Chance
Snow

High: 34 °F

Detailed Forecast

  • Today A 20 percent chance of snow showers before 11am. Mostly sunny, with a high near 38. West wind around 10 mph.
  • Tonight A 30 percent chance of snow showers, mainly before 11pm. Mostly cloudy, with a low around 24. Southwest wind around 7 mph. New snow accumulation of less than a half inch possible.
  • Monday A 20 percent chance of snow showers before 11am. Mostly sunny, with a high near 37. West wind 5 to 7 mph.
  • Monday Night A 30 percent chance of snow showers, mainly after 11pm. Increasing clouds, with a low around 21. South southwest wind around 5 mph. New snow accumulation of less than a half inch possible.
  • Tuesday A chance of snow before 11am, then rain and snow likely. Cloudy, with a high near 40. West southwest wind around 7 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
  • Tuesday Night Snow. Low around 28. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
  • Wednesday Rain and snow likely. Mostly cloudy, with a high near 39. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
  • Wednesday Night Snow likely. Mostly cloudy, with a low around 21.
  • Thanksgiving Day A chance of snow. Partly sunny, with a high near 34.
  • Thursday Night A slight chance of snow. Mostly cloudy, with a low around 15.
  • Friday A slight chance of snow. Mostly sunny, with a high near 28.
  • Friday Night A slight chance of snow. Partly cloudy, with a low around 4.
  • Saturday A slight chance of snow. Mostly sunny, with a high near 23.