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

Logan Pass Visitors Center (LGPVC)

Lat: 48.6949°NLon: 113.7169°WElev: 6775.0ft.

NA

19°F

-7°C

Humidity 92%
Wind Speed NW 4 MPH
Barometer 29.77 in (1008.13 mb)
Dewpoint 17°F (-8°C)
Visibility NA
Wind Chill13°F (-11°C)
Last update 13 Mar 05:00 PM MDT
Extended Forecast for

10 Miles SW 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 40 percent chance of snow, mainly after 3am. Patchy blowing snow. Mostly cloudy, with a low around 12. Wind chill values as low as -10. Windy, with a west southwest wind 29 to 32 mph, with gusts as high as 43 mph. Total nighttime snow accumulation of less than a half inch possible.

    Low: 12 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Monday

    Monday: Snow likely, mainly after 4pm. Patchy blowing snow before noon. Mostly cloudy, with a high near 34. Wind chill values as low as zero. Windy, with a west southwest wind 33 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 34 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 30. Very windy, with a west southwest wind 38 to 43 mph increasing to 44 to 49 mph after midnight. Winds could gust as high as 70 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 30 °F

    Very Windy.
    Snow Likely
    then Chance
    Snow

  • Tuesday

    Tuesday: A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 35. Very windy, with a west southwest wind 42 to 47 mph decreasing to 36 to 41 mph in the afternoon. Winds could gust as high as 65 mph. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance Snow
    and Very
    Windy

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 33. Windy, with a west southwest wind 36 to 39 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Snow Likely
    and Windy

  • Wednesday

    Wednesday: A 50 percent chance of snow. Mostly cloudy, with a high near 36. Windy, with a west southwest wind 36 to 39 mph, with gusts as high as 55 mph. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Chance Snow
    and Windy

  • Wednesday Night

    Wednesday Night: A chance of snow before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 34. Windy, with a west southwest wind around 37 mph, with gusts as high as 50 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 34 °F

    Chance
    Rain/Snow and
    Windy

  • Thursday

    Thursday: A chance of rain and snow before noon, then a slight chance of rain. Partly sunny, with a high near 41. Windy, with a west southwest wind 33 to 37 mph, with gusts as high as 55 mph.

    High: 41 °F

    Windy. Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 37. Windy.

    Low: 37 °F

    Chance Rain
    and Windy

Detailed Forecast

Overnight
A 40 percent chance of snow, mainly after 3am. Patchy blowing snow. Mostly cloudy, with a low around 12. Wind chill values as low as -10. Windy, with a west southwest wind 29 to 32 mph, with gusts as high as 43 mph. Total nighttime snow accumulation of less than a half inch possible.
Monday
Snow likely, mainly after 4pm. Patchy blowing snow before noon. Mostly cloudy, with a high near 34. Wind chill values as low as zero. Windy, with a west southwest wind 33 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Monday Night
Snow likely, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 30. Very windy, with a west southwest wind 38 to 43 mph increasing to 44 to 49 mph after midnight. Winds could gust as high as 70 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Tuesday
A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 35. Very windy, with a west southwest wind 42 to 47 mph decreasing to 36 to 41 mph in the afternoon. Winds could gust as high as 65 mph. New snow accumulation of less than a half inch possible.
Tuesday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 33. Windy, with a west southwest wind 36 to 39 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday
A 50 percent chance of snow. Mostly cloudy, with a high near 36. Windy, with a west southwest wind 36 to 39 mph, with gusts as high as 55 mph. New snow accumulation of less than a half inch possible.
Wednesday Night
A chance of snow before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 34. Windy, with a west southwest wind around 37 mph, with gusts as high as 50 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow before noon, then a slight chance of rain. Partly sunny, with a high near 41. Windy, with a west southwest wind 33 to 37 mph, with gusts as high as 55 mph.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 37. Windy.
Friday
Rain and snow likely. Mostly cloudy, with a high near 39. Windy.
Friday Night
Rain and snow likely. Mostly cloudy, with a low around 31. Windy.
Saturday
Snow likely. Mostly cloudy, with a high near 35. Windy.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 23. Windy.
Sunday
Mostly sunny, with a high near 32. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles SW St Mary MT
 48.64°N 113.61°W (Elev. 7448 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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