Heavy Rain Across the Southern US; Unsettled Pattern in the Pacific Northwest

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains Friday, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. High elevation snow and mixed precipitation and rain in the lower elevations will impact the Pacific Northwest this weekend before a stronger system moves in early next week. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Clear

27°F

-3°C

Humidity 58%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Last update 13 Feb 05:20 AM MST
Extended Forecast for

Lewistown MT

  • Today

    Today: Mostly sunny, with a high near 46. South southwest wind 5 to 7 mph becoming calm  in the afternoon.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 26. South wind 3 to 5 mph.

    Low: 26 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 49. West southwest wind 6 to 9 mph.

    High: 49 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30. South southwest wind 5 to 7 mph.

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain and snow.  Mostly cloudy, with a high near 47. Southwest wind 3 to 7 mph.  Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 47 °F

    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A slight chance of rain and snow before 11pm.  Partly cloudy, with a low around 26. West wind around 6 mph becoming light and variable.  Chance of precipitation is 20%.

    Low: 26 °F

    Slight Chance
    Rain/Snow
    then Partly
    Cloudy

  • Washington's Birthday

    Washington's Birthday: A 10 percent chance of snow after 5pm.  Mostly sunny, with a high near 51. South wind around 6 mph.

    High: 51 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Monday Night

    Monday Night: A slight chance of rain and snow before 8pm, then a slight chance of rain between 8pm and 2am, then a slight chance of rain and snow after 2am.  Mostly cloudy, with a low around 26. East southeast wind around 7 mph.

    Low: 26 °F

    Slight Chance
    Rain/Snow

  • Tuesday

    Tuesday: Snow likely.  Mostly cloudy, with a high near 39.

    High: 39 °F

    Snow Likely

Detailed Forecast

Today
Mostly sunny, with a high near 46. South southwest wind 5 to 7 mph becoming calm in the afternoon.
Tonight
Partly cloudy, with a low around 26. South wind 3 to 5 mph.
Saturday
Partly sunny, with a high near 49. West southwest wind 6 to 9 mph.
Saturday Night
Mostly cloudy, with a low around 30. South southwest wind 5 to 7 mph.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 47. Southwest wind 3 to 7 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Sunday Night
A slight chance of rain and snow before 11pm. Partly cloudy, with a low around 26. West wind around 6 mph becoming light and variable. Chance of precipitation is 20%.
Washington's Birthday
A 10 percent chance of snow after 5pm. Mostly sunny, with a high near 51. South wind around 6 mph.
Monday Night
A slight chance of rain and snow before 8pm, then a slight chance of rain between 8pm and 2am, then a slight chance of rain and snow after 2am. Mostly cloudy, with a low around 26. East southeast wind around 7 mph.
Tuesday
Snow likely. Mostly cloudy, with a high near 39.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 14.
Wednesday
A chance of snow. Partly sunny, with a high near 31.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 13.
Thursday
A slight chance of snow. Mostly cloudy, with a high near 35.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MT
 47.07°N 109.43°W (Elev. 3898 ft)
4:17 am MST Feb 13, 2026
5am MST Feb 13, 2026-6pm MST Feb 19, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database