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

24°F

-4°C

Humidity 60%
Wind Speed NA 12 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Wind Chill13°F (-11°C)
Last update 16 Mar 12:10 AM MDT
Extended Forecast for

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 20 percent chance of snow after 3am. Mostly cloudy, with a low around 22. Southwest wind 10 to 16 mph, with gusts as high as 36 mph.

    Low: 22 °F

    Slight Chance
    Snow

  • Monday

    Monday: A slight chance of snow before 7am, then a chance of rain after 3pm. Patchy blowing snow before 11am. Mostly cloudy, with a high near 44. Breezy, with a southwest wind 17 to 23 mph, with gusts as high as 48 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 44 °F

    Chance
    Rain/Snow and
    Patchy
    Blowing Snow

  • Monday Night

    Monday Night: A 30 percent chance of rain, mainly before 7pm. Mostly cloudy, with a low around 39. Breezy, with a west southwest wind 22 to 29 mph, with gusts as high as 60 mph.

    Low: 39 °F

    Breezy.
    Chance Rain
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50. Breezy, with a west southwest wind 21 to 28 mph, with gusts as high as 60 mph.

    High: 50 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 43. Breezy, with a west southwest wind 16 to 23 mph, with gusts as high as 49 mph.

    Low: 43 °F

    Chance Rain
    and Breezy

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 51. Breezy, with a west southwest wind around 22 mph, with gusts as high as 49 mph.

    High: 51 °F

    Chance Rain
    and Breezy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 44. West southwest wind around 21 mph, with gusts as high as 47 mph.

    Low: 44 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: A slight chance of rain before noon. Partly sunny, with a high near 56. Breezy, with a west southwest wind 17 to 22 mph, with gusts as high as 47 mph.

    High: 56 °F

    Slight Chance
    Rain then
    Partly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: A slight chance of rain after midnight. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Overnight
A 20 percent chance of snow after 3am. Mostly cloudy, with a low around 22. Southwest wind 10 to 16 mph, with gusts as high as 36 mph.
Monday
A slight chance of snow before 7am, then a chance of rain after 3pm. Patchy blowing snow before 11am. Mostly cloudy, with a high near 44. Breezy, with a southwest wind 17 to 23 mph, with gusts as high as 48 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Monday Night
A 30 percent chance of rain, mainly before 7pm. Mostly cloudy, with a low around 39. Breezy, with a west southwest wind 22 to 29 mph, with gusts as high as 60 mph.
Tuesday
Mostly sunny, with a high near 50. Breezy, with a west southwest wind 21 to 28 mph, with gusts as high as 60 mph.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 43. Breezy, with a west southwest wind 16 to 23 mph, with gusts as high as 49 mph.
Wednesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 51. Breezy, with a west southwest wind around 22 mph, with gusts as high as 49 mph.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 44. West southwest wind around 21 mph, with gusts as high as 47 mph.
Thursday
A slight chance of rain before noon. Partly sunny, with a high near 56. Breezy, with a west southwest wind 17 to 22 mph, with gusts as high as 47 mph.
Thursday Night
A slight chance of rain after midnight. Mostly cloudy, with a low around 46.
Friday
A chance of rain. Partly sunny, with a high near 53.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 38.
Saturday
A chance of rain and snow. Partly sunny, with a high near 47.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 29.
Sunday
Sunny, with a high near 45.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St Mary MT
 48.74°N 113.44°W (Elev. 4554 ft)
Last Update:
12:41 am MDT Mar 16, 2026
Forecast Valid:
12am MDT Mar 16, 2026-6pm MDT Mar 22, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation