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

Hazardous Spring Weather Shifts to the Eastern and Northwest U.S. Wednesday

Isolated to scattered severe thunderstorms are expected Wednesday from the ArkLaTex and Lower Mississippi Valley northeastward through the Ohio Valley and Mid-Atlantic. Thunderstorms may produce heavy to excessive rain that could pose a flooding threat from east Texas into Upstate New York. A moderate atmospheric river will bring heavy snow and high winds to the Northwest U.S. Read More >

Hazardous Weather Conditions

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Clear

21°F

-6°C

Humidity 62%
Wind Speed NNW 4 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 11 Mar 02:15 AM MDT
Extended Forecast for

Lewistown MT

Winter Storm Watch March 12, 06:00pm until March 14, 06:00pm
High Wind Warning March 12, 03:00am until March 12, 06:00pm
Click here for hazard details and duration
Winter Storm Watch
High Wind Warning

  • Overnight

    Overnight: Mostly clear, with a low around 15. West southwest wind around 7 mph.

    Low: 15 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 41. Breezy, with a west wind 7 to 12 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 41 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of snow before 11pm, then a slight chance of rain and snow between 11pm and 3am, then a slight chance of rain after 3am. Cloudy, with a low around 31. Breezy, with a south wind 9 to 14 mph becoming west southwest 19 to 24 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Chance
    Rain/Snow and
    Breezy

  • Thursday

    Thursday: A chance of rain before noon, then snow. High near 47. Windy, with a west wind 26 to 34 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 47 °F

    Windy. Chance
    Rain then
    Snow

  • Thursday Night

    Thursday Night: Snow. Low around 23. Blustery, with a west wind 18 to 23 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 23 °F

    Snow and
    Blustery

  • Friday

    Friday: Snow. High near 34. West northwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    High: 34 °F

    Snow

  • Friday Night

    Friday Night: Snow. Low around 19. North wind 6 to 8 mph becoming southeast after midnight. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 19 °F

    Snow

  • Saturday

    Saturday: Snow. Cloudy, with a high near 34. East southeast wind 6 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 34 °F

    Snow

  • Saturday Night

    Saturday Night: Snow likely, mainly before midnight. Cloudy, with a low around 7.

    Low: 7 °F

    Snow Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 15. West southwest wind around 7 mph.
Wednesday
Increasing clouds, with a high near 41. Breezy, with a west wind 7 to 12 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph.
Wednesday Night
A chance of snow before 11pm, then a slight chance of rain and snow between 11pm and 3am, then a slight chance of rain after 3am. Cloudy, with a low around 31. Breezy, with a south wind 9 to 14 mph becoming west southwest 19 to 24 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Thursday
A chance of rain before noon, then snow. High near 47. Windy, with a west wind 26 to 34 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow. Low around 23. Blustery, with a west wind 18 to 23 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Friday
Snow. High near 34. West northwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Friday Night
Snow. Low around 19. North wind 6 to 8 mph becoming southeast after midnight. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Saturday
Snow. Cloudy, with a high near 34. East southeast wind 6 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Snow likely, mainly before midnight. Cloudy, with a low around 7.
Sunday
A chance of snow. Partly sunny, with a high near 29.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 15.
Monday
A chance of rain and snow. Cloudy, with a high near 47.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 35.
Tuesday
A slight chance of rain. Mostly cloudy, with a high near 61.
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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:
1:52 am MDT Mar 11, 2026
Forecast Valid:
2am MDT Mar 11, 2026-6pm MDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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