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

Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

Hazardous Weather Conditions

Current conditions at

FLATTOP MTN. (FTMM8)

Lat: 48.80225°NLon: 113.85713°WElev: 6300.0ft.

NA

11°F

-12°C

Humidity 79%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 6°F (-14°C)
Visibility NA
Last update 14 Mar 12:00 PM MDT
Extended Forecast for

16 Miles W St Mary MT

Blizzard Warning March 14, 03:25pm until March 14, 06:00pm
Click here for hazard details and duration
...
  •  
    Blizzard Warning March 14, 03:25pm until March 14, 06:00pm

    NOW until 6:00pm Sat

    Blizzard Warning

  • Tonight

    Low: -6 °F

    Snow Likely
    then Partly
    Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 14. Wind chill values as low as -25. Southwest wind 9 to 17 mph, with gusts as high as 23 mph.

    High: 14 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 13. Wind chill values as low as -5. Breezy, with a southwest wind 17 to 24 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 13 °F

    Snow Likely
    and Breezy

  • Monday

    Monday: Snow likely. Cloudy, with a high near 31. Wind chill values as low as zero. Windy, with a southwest wind 26 to 30 mph, with gusts as high as 41 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 31 °F

    Snow Likely
    and Windy

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Cloudy, with a low around 28. Windy, with a southwest wind 30 to 33 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Snow Likely
    and Windy

  • Tuesday

    Tuesday: A 40 percent chance of snow. Mostly cloudy, with a high near 33. Windy, with a southwest wind 29 to 33 mph, with gusts as high as 44 mph. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Chance Snow
    and Windy

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 32. Breezy, with a southwest wind 24 to 29 mph, with gusts as high as 39 mph. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Chance Snow
    and Breezy

  • Wednesday

    Wednesday: A chance of snow. Mostly cloudy, with a high near 35. Breezy, with a southwest wind around 25 mph, with gusts as high as 36 mph.

    High: 35 °F

    Chance Snow
    and Breezy

Detailed Forecast

Tonight
Snow likely, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around -6. Wind chill values as low as -20. North northeast wind 8 to 14 mph becoming west after midnight. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Increasing clouds, with a high near 14. Wind chill values as low as -25. Southwest wind 9 to 17 mph, with gusts as high as 23 mph.
Sunday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 13. Wind chill values as low as -5. Breezy, with a southwest wind 17 to 24 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday
Snow likely. Cloudy, with a high near 31. Wind chill values as low as zero. Windy, with a southwest wind 26 to 30 mph, with gusts as high as 41 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Monday Night
Snow likely, mainly before midnight. Cloudy, with a low around 28. Windy, with a southwest wind 30 to 33 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday
A 40 percent chance of snow. Mostly cloudy, with a high near 33. Windy, with a southwest wind 29 to 33 mph, with gusts as high as 44 mph. New snow accumulation of less than a half inch possible.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 32. Breezy, with a southwest wind 24 to 29 mph, with gusts as high as 39 mph. New snow accumulation of less than a half inch possible.
Wednesday
A chance of snow. Mostly cloudy, with a high near 35. Breezy, with a southwest wind around 25 mph, with gusts as high as 36 mph.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 33. Breezy.
Thursday
A chance of rain and snow. Mostly cloudy, with a high near 37. Breezy.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 35. Breezy.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 39. Breezy.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 34.
Saturday
A chance of snow. Mostly cloudy, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles W St Mary MT
 48.79°N 113.77°W (Elev. 7480 ft)
Last Update:
2:47 pm MDT Mar 14, 2026
Forecast Valid:
3pm MDT Mar 14, 2026-6pm MDT Mar 21, 2026
 
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