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

Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. 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

28°F

-2°C

Humidity 51%
Wind Speed NA 16 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Wind Chill16°F (-9°C)
Last update 16 Mar 03:10 AM MDT
Extended Forecast for

5 Miles WSW St Mary MT

Winter Weather Advisory March 16, 04:19am until March 16, 12:00pm
High Wind Warning March 16, 09:00am until March 17, 06:00pm
Click here for hazard details and duration
Winter Weather Advisory
High Wind Warning
  •  
    Winter Weather Advisory March 16, 04:19am until March 16, 12:00pm

    NOW until 12:00pm Mon

    Winter Weather Advisory

  • Overnight

    Low: 17 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Monday

    Monday: A slight chance of snow before noon, then a chance of snow after 1pm. Patchy blowing snow before noon. Mostly cloudy, with a high near 32. Wind chill values as low as zero. Windy, with a west wind 34 to 43 mph, with gusts as high as 70 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    High: 32 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Monday Night

    Monday Night: A chance of rain and snow before midnight, then a slight chance of rain and snow after 3am. Mostly cloudy, with a low around 29. Very windy, with a west southwest wind 39 to 44 mph increasing to 45 to 50 mph after midnight. Winds could gust as high as 85 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Chance
    Rain/Snow and
    Very Windy

  • Tuesday

    Tuesday: A slight chance of snow after noon, mixing with rain after 3pm. Partly sunny, with a high near 36. Very windy, with a west southwest wind 38 to 47 mph, with gusts as high as 75 mph. Chance of precipitation is 20%.

    High: 36 °F

    Slight Chance
    Rain/Snow and
    Very Windy

  • Tuesday Night

    Tuesday Night: A chance of rain and snow. Mostly cloudy, with a low around 33. Windy, with a west southwest wind 34 to 40 mph, with gusts as high as 70 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 33 °F

    Chance
    Rain/Snow and
    Windy

  • Wednesday

    Wednesday: A chance of rain and snow, mainly before noon. Mostly cloudy, with a high near 37. Windy, with a west southwest wind 37 to 39 mph, with gusts as high as 65 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 37 °F

    Chance
    Rain/Snow and
    Windy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 34. Windy, with a west southwest wind around 37 mph, with gusts as high as 65 mph.

    Low: 34 °F

    Chance Rain
    and Windy

  • Thursday

    Thursday: A slight chance of rain. Partly sunny, with a high near 41. Windy, with a west southwest wind 32 to 41 mph, with gusts as high as 70 mph.

    High: 41 °F

    Slight Chance
    Rain and
    Windy

Detailed Forecast

Overnight
A 30 percent chance of snow. Patchy blowing snow. Mostly cloudy, with a steady temperature around 17. Wind chill values as low as -5. Windy, with a west wind 31 to 33 mph, with gusts as high as 55 mph. Little or no snow accumulation expected.
Monday
A slight chance of snow before noon, then a chance of snow after 1pm. Patchy blowing snow before noon. Mostly cloudy, with a high near 32. Wind chill values as low as zero. Windy, with a west wind 34 to 43 mph, with gusts as high as 70 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Monday Night
A chance of rain and snow before midnight, then a slight chance of rain and snow after 3am. Mostly cloudy, with a low around 29. Very windy, with a west southwest wind 39 to 44 mph increasing to 45 to 50 mph after midnight. Winds could gust as high as 85 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Tuesday
A slight chance of snow after noon, mixing with rain after 3pm. Partly sunny, with a high near 36. Very windy, with a west southwest wind 38 to 47 mph, with gusts as high as 75 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 33. Windy, with a west southwest wind 34 to 40 mph, with gusts as high as 70 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Wednesday
A chance of rain and snow, mainly before noon. Mostly cloudy, with a high near 37. Windy, with a west southwest wind 37 to 39 mph, with gusts as high as 65 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 34. Windy, with a west southwest wind around 37 mph, with gusts as high as 65 mph.
Thursday
A slight chance of rain. Partly sunny, with a high near 41. Windy, with a west southwest wind 32 to 41 mph, with gusts as high as 70 mph.
Thursday Night
A chance of rain, mainly after midnight. Mostly cloudy, with a low around 37. Very windy.
Friday
A chance of rain before 9am, then a chance of rain and snow between 9am and 3pm, then a chance of rain after 3pm. Mostly cloudy, with a high near 40. Windy.
Friday Night
Rain and snow likely. Mostly cloudy, with a low around 30. Windy.
Saturday
A chance of snow. Mostly cloudy, with a high near 34. Windy.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 21. Windy.
Sunday
Sunny, with a high near 32. Windy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW St Mary MT
 48.73°N 113.53°W (Elev. 6778 ft)
Last Update:
3:57 am MDT Mar 16, 2026
Forecast Valid:
4am MDT Mar 16, 2026-6pm MDT Mar 22, 2026
 
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