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

23°F

-5°C

Humidity 80%
Wind Speed WSW 9 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 09 Mar 10:54 PM MDT
Extended Forecast for

Lewistown Municipal MT

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

  • Tonight

    Tonight: Partly cloudy, with a low around 19. West southwest wind 6 to 8 mph.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of snow, mainly between 2pm and 5pm. Partly sunny, with a high near 36. Southwest wind 6 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Mostly Sunny
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 16. West wind 10 to 14 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 41. Breezy, with a southwest wind 11 to 16 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 41 °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 11 to 21 mph, with gusts as high as 32 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 26 to 31 mph increasing to 33 to 38 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 46 °F

    Windy.
    Rain/Snow
    Likely then
    Rain/Snow

  • Thursday Night

    Thursday Night: Snow. Low around 25. Blustery, with a west wind 23 to 28 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 25 °F

    Snow and
    Blustery

  • Friday

    Friday: Snow. Cloudy, with a high near 40. West southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 40 °F

    Snow

  • Friday Night

    Friday Night: Snow. Cloudy, with a low around 20.

    Low: 20 °F

    Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 19. West southwest wind 6 to 8 mph.
Tuesday
A 40 percent chance of snow, mainly between 2pm and 5pm. Partly sunny, with a high near 36. Southwest wind 6 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph. New snow accumulation of less than a half inch possible.
Tuesday Night
A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 16. West wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
Partly sunny, with a high near 41. Breezy, with a southwest wind 11 to 16 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 36 mph.
Wednesday Night
A chance of snow before 3am, then a chance of rain and snow. Cloudy, with a low around 31. Southwest wind 11 to 21 mph, with gusts as high as 32 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 26 to 31 mph increasing to 33 to 38 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
Snow. Low around 25. Blustery, with a west wind 23 to 28 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Friday
Snow. Cloudy, with a high near 40. West southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Friday Night
Snow. Cloudy, with a low around 20.
Saturday
Snow. Cloudy, with a high near 31.
Saturday Night
Snow likely. 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 Municipal MT
 47.04°N 109.45°W (Elev. 4111 ft)
Last Update:
10:47 pm MDT Mar 9, 2026
Forecast Valid:
11pm MDT Mar 9, 2026-6pm MDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation