National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorm, Flooding, and Winter Weather Threats on Tuesday

Scattered severe thunderstorms are forecast Tuesday from the southern Plains into the southern Great Lakes vicinity. Thunderstorms may also produce heavy to excessive rain that could pose a flooding threat from central Texas into southern Oklahoma and northern Missouri into southern Michigan. A heavy wintry mix is forecast for the Great Lakes into northern Maine. Read More >

Hazardous Weather Conditions

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Clear

18°F

-8°C

Humidity 80%
Wind Speed SSE 3 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Last update 10 Mar 03:54 AM MDT
Extended Forecast for

Lewistown MT

High Wind Watch March 12, 12:00am until March 12, 06:00pm
Click here for hazard details and duration
High Wind Watch

  • Today

    Today: A 30 percent chance of snow, mainly between 2pm and 5pm. Partly sunny, with a high near 36. Light and variable wind becoming west northwest 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Total daytime snow accumulation of less than a half inch possible.

    High: 36 °F

    Mostly Sunny
    then Chance
    Snow

  • Tonight

    Tonight: A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 16. West wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 16 °F

    Slight Chance
    Snow then
    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 42. Breezy, with a southwest wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 42 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of snow before 3am, then a chance of rain and snow. Cloudy, with a low around 31. Southwest wind 9 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Thursday

    Thursday: Rain, possibly mixed with snow, becoming all snow after 3pm. High near 46. Windy, with a west southwest wind 23 to 28 mph increasing to 32 to 37 mph in the afternoon. Winds could gust as high as 49 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 46 °F

    Rain/Snow
    Likely and
    Breezy then
    Rain/Snow and
    Windy

  • Thursday Night

    Thursday Night: Snow. Low around 25. Blustery, with a west wind 20 to 25 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 25 °F

    Snow and
    Blustery

  • Friday

    Friday: Snow. High near 40. West southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 40 °F

    Snow

  • Friday Night

    Friday Night: Rain and snow, becoming all snow after 9pm. Cloudy, with a low around 20. West northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 20 °F

    Rain/Snow
    then Snow

  • Saturday

    Saturday: Snow. Cloudy, with a high near 31.

    High: 31 °F

    Snow

Detailed Forecast

Today
A 30 percent chance of snow, mainly between 2pm and 5pm. Partly sunny, with a high near 36. Light and variable wind becoming west northwest 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Total daytime snow accumulation of less than a half inch possible.
Tonight
A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 16. West wind 8 to 13 mph, with gusts as high as 23 mph.
Wednesday
Partly sunny, with a high near 42. Breezy, with a southwest wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.
Wednesday Night
A chance of snow before 3am, then a chance of rain and snow. Cloudy, with a low around 31. Southwest wind 9 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Thursday
Rain, possibly mixed with snow, becoming all snow after 3pm. High near 46. Windy, with a west southwest wind 23 to 28 mph increasing to 32 to 37 mph in the afternoon. Winds could gust as high as 49 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
Snow. Low around 25. Blustery, with a west wind 20 to 25 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Friday
Snow. High near 40. West southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Friday Night
Rain and snow, becoming all snow after 9pm. Cloudy, with a low around 20. West northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday
Snow. Cloudy, with a high near 31.
Saturday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 8.
Sunday
A slight chance of snow. Mostly cloudy, with a high near 31.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 16.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
2:12 am MDT Mar 10, 2026
Forecast Valid:
4am MDT Mar 10, 2026-6pm MDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation