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

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

Lat: 48.74111°NLon: 113.43306°WElev: 4550.0ft.

NA

19°F

-7°C

Humidity 73%
Wind Speed NA 1 MPH
Barometer NA
Dewpoint 11°F (-12°C)
Visibility NA
Last update 09 Mar 10:10 PM MDT
Extended Forecast for

St Mary MT

Winter Storm Watch March 11, 06:00pm until March 13, 06:00pm
High Wind Watch March 11, 06:00pm until March 12, 06:00pm
Click here for hazard details and duration
Winter Storm Watch
High Wind Watch

  • Tonight

    Tonight: A 40 percent chance of snow, mainly after 5am. Partly cloudy, with a low around 16. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. Little or no snow accumulation expected.

    Low: 16 °F

    Mostly Clear
    then Chance
    Snow

  • Tuesday

    Tuesday: A chance of snow before 10am, then a chance of snow after noon. Partly sunny, with a high near 29. West wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.

    High: 29 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow after midnight. Partly cloudy, with a low around 20. West southwest wind 10 to 14 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.

    Low: 20 °F

    Partly Cloudy
    then Chance
    Snow

  • Wednesday

    Wednesday: Snow likely. Mostly cloudy, with a high near 35. West southwest wind 13 to 17 mph, with gusts as high as 37 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 35 °F

    Snow Likely

  • Wednesday Night

    Wednesday Night: Snow. Low around 30. Breezy, with a southwest wind 16 to 23 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Low: 30 °F

    Snow and
    Breezy

  • Thursday

    Thursday: Snow. High near 39. Breezy, with a west southwest wind 18 to 25 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    High: 39 °F

    Snow and
    Breezy

  • Thursday Night

    Thursday Night: Snow. Low around 26. West southwest wind 9 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    Low: 26 °F

    Snow

  • Friday

    Friday: Snow. The snow could be heavy at times. Cloudy, with a high near 35. West northwest wind 8 to 10 mph, with gusts as high as 23 mph.

    High: 35 °F

    Heavy Snow

  • Friday Night

    Friday Night: Snow. The snow could be heavy at times. Cloudy, with a low around 18.

    Low: 18 °F

    Heavy Snow

Detailed Forecast

Tonight
A 40 percent chance of snow, mainly after 5am. Partly cloudy, with a low around 16. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. Little or no snow accumulation expected.
Tuesday
A chance of snow before 10am, then a chance of snow after noon. Partly sunny, with a high near 29. West wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.
Tuesday Night
A 30 percent chance of snow after midnight. Partly cloudy, with a low around 20. West southwest wind 10 to 14 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.
Wednesday
Snow likely. Mostly cloudy, with a high near 35. West southwest wind 13 to 17 mph, with gusts as high as 37 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Wednesday Night
Snow. Low around 30. Breezy, with a southwest wind 16 to 23 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Thursday
Snow. High near 39. Breezy, with a west southwest wind 18 to 25 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Thursday Night
Snow. Low around 26. West southwest wind 9 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Friday
Snow. The snow could be heavy at times. Cloudy, with a high near 35. West northwest wind 8 to 10 mph, with gusts as high as 23 mph.
Friday Night
Snow. The snow could be heavy at times. Cloudy, with a low around 18.
Saturday
Snow. The snow could be heavy at times. Cloudy, with a high near 27.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 11.
Sunday
A chance of snow. Mostly cloudy, with a high near 35.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 25.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St Mary MT
 48.74°N 113.44°W (Elev. 4554 ft)
Last Update:
9:57 pm MDT Mar 9, 2026
Forecast Valid:
10pm MDT Mar 9, 2026-6pm MDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation