Heavy Snow from the Midwest into the Great Lakes; Locally Heavy Rain in the Western Gulf Coast

A significant winter storm will produce a broad area of moderate to heavy snow from the Midwest through the western Great Lakes. Significant snow accumulations of 6-12 inches, and locally more than 1 foot, and gusty wind may cause hazardous travel conditions. Thunderstorms, some severe, and showers may produce locally heavy rain and isolated flash flooding along the western Gulf Coast. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

Lat: 40.09°NLon: 105.92°WElev: 8207ft.

Fair

13°F

-11°C

Humidity 76%
Wind Speed NE 3 mph
Barometer 30.18 in
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Last update 29 Nov 10:55 pm MST
Extended Forecast for

3 Miles W Saint Marys Glacier CO

Winter Weather Advisory November 30, 11:00am until December 1, 05:00am
Click here for hazard details and duration
Winter Weather Advisory
  • Tonight

    Tonight: Mostly cloudy, with a low around 4. Wind chill values as low as -11. West southwest wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 4 °F

    Mostly Cloudy

  • Sunday

    Sunday: Snow, mainly after 11am.  High near 15. Wind chill values as low as -6. West southwest wind 9 to 11 mph, with gusts as high as 18 mph.  Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 15 °F

    Snow

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times.  Low around 1. Wind chill values as low as -17. Blustery, with a west northwest wind 8 to 15 mph, with gusts as high as 24 mph.  Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Low: 1 °F

    Heavy Snow
    then Snow
    Likely and
    Blustery

  • Monday

    Monday: A 30 percent chance of snow before 11am.  Mostly cloudy, then gradually becoming sunny and cold, with a high near 8. Wind chill values as low as -18. Breezy, with a west northwest wind 16 to 21 mph, with gusts as high as 33 mph.  New snow accumulation of less than a half inch possible.

    High: 8 °F

    Chance Snow
    and Blustery
    then Sunny
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 2. Breezy, with a west wind 18 to 21 mph, with gusts as high as 36 mph.

    Low: 2 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: A 30 percent chance of snow after 11am.  Partly sunny, with a high near 15. Breezy.

    High: 15 °F

    Chance Snow
    and Breezy

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after 11pm.  Mostly cloudy, with a low around 4. Chance of precipitation is 60%.

    Low: 4 °F

    Snow Likely

  • Wednesday

    Wednesday: Snow.  Cloudy and cold, with a high near 7.

    High: 7 °F

    Snow

  • Wednesday Night

    Wednesday Night: A chance of snow, mainly before 11pm.  Mostly cloudy, with a low around 1. Breezy.

    Low: 1 °F

    Chance Snow
    and Breezy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 4. Wind chill values as low as -11. West southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Sunday
Snow, mainly after 11am. High near 15. Wind chill values as low as -6. West southwest wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
Snow. The snow could be heavy at times. Low around 1. Wind chill values as low as -17. Blustery, with a west northwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Monday
A 30 percent chance of snow before 11am. Mostly cloudy, then gradually becoming sunny and cold, with a high near 8. Wind chill values as low as -18. Breezy, with a west northwest wind 16 to 21 mph, with gusts as high as 33 mph. New snow accumulation of less than a half inch possible.
Monday Night
Partly cloudy, with a low around 2. Breezy, with a west wind 18 to 21 mph, with gusts as high as 36 mph.
Tuesday
A 30 percent chance of snow after 11am. Partly sunny, with a high near 15. Breezy.
Tuesday Night
Snow likely, mainly after 11pm. Mostly cloudy, with a low around 4. Chance of precipitation is 60%.
Wednesday
Snow. Cloudy and cold, with a high near 7.
Wednesday Night
A chance of snow, mainly before 11pm. Mostly cloudy, with a low around 1. Breezy.
Thursday
A slight chance of snow. Partly sunny, with a high near 12. Breezy.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 5. Breezy.
Friday
A chance of snow. Partly sunny, with a high near 14. Windy.
Friday Night
A chance of snow. Mostly cloudy, with a low around 10. Windy.
Saturday
A chance of snow. Partly sunny, with a high near 17. Windy.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Saint Marys Glacier CO
 39.84°N 105.69°W (Elev. 12507 ft)
2:11 pm MST Nov 29, 2025
11pm MST Nov 29, 2025-6pm MST Dec 6, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database