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

Significant Severe Weather in the Upper Midwest; Blizzard Conditions in the Cascades; Heavy Rain and Thunderstorms in Hawaii

Significant severe thunderstorms, including the risk for strong to intense tornadoes, are expected across the Upper Midwest this afternoon and evening. An atmospheric river will bring blizzard conditions to the northern Cascades. A powerful Kona storm is expected to impact Hawaii today into Saturday, bringing heavy rainfall and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Lewistown Divide MT-200 MP 90.3 (MTLEW)

Lat: 47.07579°NLon: 109.26247°WElev: 4723.0ft.

NA

31°F

-1°C

Humidity 33%
Wind Speed NW 7 MPH
Barometer NA
Dewpoint 5°F (-15°C)
Visibility NA
Wind Chill24°F (-4°C)
Last update 10 Mar 02:45 PM MDT
Extended Forecast for

7 Miles ENE 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

  • This Afternoon

    This Afternoon: A 20 percent chance of snow. Partly sunny, with a high near 31. West wind around 11 mph, with gusts as high as 22 mph.

    High: 31 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: A 20 percent chance of snow before 8pm. Partly cloudy, with a low around 17. West wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 17 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 35. West wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 35 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of snow. Cloudy, with a low around 30. Breezy, with a west southwest wind 11 to 16 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 43 mph. Little or no snow accumulation expected.

    Low: 30 °F

    Chance Snow
    and Breezy

  • Thursday

    Thursday: Snow. Patchy blowing snow after noon. High near 41. Windy, with a west southwest wind 26 to 34 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    High: 41 °F

    Snow and
    Patchy
    Blowing Snow

  • Thursday Night

    Thursday Night: Snow. Patchy blowing snow before 9pm. Low around 24. Blustery, with a west wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 24 °F

    Snow and
    Patchy
    Blowing Snow

  • Friday

    Friday: Snow. High near 31. West wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    High: 31 °F

    Snow

  • Friday Night

    Friday Night: Snow. Cloudy, with a low around 18. North northwest wind 8 to 10 mph becoming east after midnight. Winds could gust as high as 21 mph.

    Low: 18 °F

    Snow

  • Saturday

    Saturday: Snow. The snow could be heavy at times. Cloudy, with a high near 26.

    High: 26 °F

    Heavy Snow

Detailed Forecast

This Afternoon
A 20 percent chance of snow. Partly sunny, with a high near 31. West wind around 11 mph, with gusts as high as 22 mph.
Tonight
A 20 percent chance of snow before 8pm. Partly cloudy, with a low around 17. West wind 9 to 11 mph, with gusts as high as 21 mph.
Wednesday
Partly sunny, with a high near 35. West wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 37 mph.
Wednesday Night
A 40 percent chance of snow. Cloudy, with a low around 30. Breezy, with a west southwest wind 11 to 16 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 43 mph. Little or no snow accumulation expected.
Thursday
Snow. Patchy blowing snow after noon. High near 41. Windy, with a west southwest wind 26 to 34 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Thursday Night
Snow. Patchy blowing snow before 9pm. Low around 24. Blustery, with a west wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Friday
Snow. High near 31. West wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Friday Night
Snow. Cloudy, with a low around 18. North northwest wind 8 to 10 mph becoming east after midnight. Winds could gust as high as 21 mph.
Saturday
Snow. The snow could be heavy at times. Cloudy, with a high near 26.
Saturday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 8.
Sunday
A slight chance of snow. Partly sunny, with a high near 23.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 14.
Monday
A chance of snow. Mostly cloudy, with a high near 39.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 34.
Tuesday
Mostly cloudy, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles ENE Lewistown MT
 47.12°N 109.31°W (Elev. 4902 ft)
Last Update:
2:17 pm MDT Mar 10, 2026
Forecast Valid:
3pm MDT Mar 10, 2026-6pm MDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation