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

ST. MARY (SRYM8)

Lat: 48.74108°NLon: 113.43289°WElev: 4557.0ft.

NA

27°F

-3°C

Humidity 58%
Wind Speed SSW 14 MPH
Barometer NA
Dewpoint 14°F (-10°C)
Visibility NA
Wind Chill16°F (-9°C)
Last update 16 Mar 02:11 AM MDT
Extended Forecast for

7 Miles S St Mary MT

Winter Weather Advisory March 16, 03:00am 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

  • Overnight

    Overnight: A 30 percent chance of snow after 3am. Widespread blowing snow. Mostly cloudy, with a low around 10. Wind chill values as low as -10. Windy, with a west southwest wind 33 to 40 mph, with gusts as high as 49 mph. Total nighttime snow accumulation of less than a half inch possible.

    Low: 10 °F

    Chance Snow
    and Blowing
    Snow

  • Monday

    Monday: A 50 percent chance of snow, mainly after 3pm. Widespread blowing snow before noon. Mostly cloudy, with a high near 31. Wind chill values as low as -5. Very windy, with a west southwest wind 41 to 50 mph, with gusts as high as 65 mph. New snow accumulation of less than one inch possible.

    High: 31 °F

    Chance Snow
    and Blowing
    Snow

  • Monday Night

    Monday Night: A chance of snow before 1am, then a slight chance of snow after 4am. Mostly cloudy, with a low around 29. Strong and damaging winds, with a west southwest wind 49 to 54 mph increasing to 55 to 60 mph after midnight. Winds could gust as high as 75 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Chance Snow
    and Damaging
    Winds

  • Tuesday

    Tuesday: A 20 percent chance of snow after noon. Partly sunny, with a high near 33. Very windy, with a west southwest wind 50 to 55 mph decreasing to 45 to 50 mph in the afternoon. Winds could gust as high as 70 mph.

    High: 33 °F

    Very Windy.
    Partly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 32. Very windy, with a west southwest wind 43 to 50 mph, with gusts as high as 65 mph. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Chance Snow
    and Very
    Windy

  • Wednesday

    Wednesday: A 40 percent chance of snow. Mostly cloudy, with a high near 34. Very windy, with a west southwest wind 45 to 48 mph, with gusts as high as 60 mph. New snow accumulation of less than a half inch possible.

    High: 34 °F

    Chance Snow
    and Very
    Windy

  • Wednesday Night

    Wednesday Night: A chance of snow before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 33. Very windy, with a west southwest wind around 47 mph, with gusts as high as 60 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 33 °F

    Very Windy.
    Chance Snow
    then Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of rain and snow, mainly before noon. Partly sunny, with a high near 39. Very windy, with a west southwest wind 40 to 48 mph, with gusts as high as 65 mph.

    High: 39 °F

    Chance
    Rain/Snow and
    Very Windy

  • Thursday Night

    Thursday Night: A slight chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 35. Windy.

    Low: 35 °F

    Chance
    Rain/Snow and
    Windy

Detailed Forecast

Overnight
A 30 percent chance of snow after 3am. Widespread blowing snow. Mostly cloudy, with a low around 10. Wind chill values as low as -10. Windy, with a west southwest wind 33 to 40 mph, with gusts as high as 49 mph. Total nighttime snow accumulation of less than a half inch possible.
Monday
A 50 percent chance of snow, mainly after 3pm. Widespread blowing snow before noon. Mostly cloudy, with a high near 31. Wind chill values as low as -5. Very windy, with a west southwest wind 41 to 50 mph, with gusts as high as 65 mph. New snow accumulation of less than one inch possible.
Monday Night
A chance of snow before 1am, then a slight chance of snow after 4am. Mostly cloudy, with a low around 29. Strong and damaging winds, with a west southwest wind 49 to 54 mph increasing to 55 to 60 mph after midnight. Winds could gust as high as 75 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Tuesday
A 20 percent chance of snow after noon. Partly sunny, with a high near 33. Very windy, with a west southwest wind 50 to 55 mph decreasing to 45 to 50 mph in the afternoon. Winds could gust as high as 70 mph.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 32. Very windy, with a west southwest wind 43 to 50 mph, with gusts as high as 65 mph. New snow accumulation of less than a half inch possible.
Wednesday
A 40 percent chance of snow. Mostly cloudy, with a high near 34. Very windy, with a west southwest wind 45 to 48 mph, with gusts as high as 60 mph. New snow accumulation of less than a half inch possible.
Wednesday Night
A chance of snow before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 33. Very windy, with a west southwest wind around 47 mph, with gusts as high as 60 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow, mainly before noon. Partly sunny, with a high near 39. Very windy, with a west southwest wind 40 to 48 mph, with gusts as high as 65 mph.
Thursday Night
A slight chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 35. Windy.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 38. Windy.
Friday Night
Rain and snow likely. Mostly cloudy, with a low around 27. Windy.
Saturday
A chance of snow. Mostly cloudy, with a high near 32. Windy.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 20. Windy.
Sunday
Mostly sunny, with a high near 30. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles S St Mary MT
 48.64°N 113.42°W (Elev. 7927 ft)
Last Update:
12:41 am MDT Mar 16, 2026
Forecast Valid:
2am MDT Mar 16, 2026-6pm MDT Mar 22, 2026
 
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