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

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

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

Overcast

21°F

-6°C

Humidity 68%
Wind Speed SW 6 mph
Barometer 30.06 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 5 Dec 2:15 am MST
Extended Forecast for

3 Miles WNW Saint Marys Glacier CO

Winter Storm Warning December 5, 11:00pm until December 6, 11:00pm
Click here for hazard details and duration
Winter Storm Warning

  • Overnight

    Overnight: A 40 percent chance of snow. Widespread blowing snow, mainly after 5am. Mostly cloudy, with a low around 1. Wind chill values as low as -23. Windy, with a west northwest wind 26 to 29 mph, with gusts as high as 47 mph. Total nighttime snow accumulation of less than a half inch possible.

    Low: 1 °F

    Chance Snow
    and Blowing
    Snow

  • Friday

    Friday: Snow likely. Areas of blowing snow. Mostly cloudy and cold, with a high near 10. Wind chill values as low as -19. Breezy, with a west wind 21 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    High: 10 °F

    Snow Likely
    and Areas
    Blowing Snow

  • Friday Night

    Friday Night: Snow, mainly after 11pm. The snow could be heavy at times. Widespread blowing snow, mainly after 11pm. Temperature rising to around 14 by 5am. Wind chill values as low as -13. Windy, with a west wind 24 to 30 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 4 to 8 inches possible.

    Low: 8 °F⇑

    Heavy Snow
    and Blowing
    Snow

  • Saturday

    Saturday: Snow. The snow could be heavy at times. Widespread blowing snow. High near 13. Wind chill values as low as -15. Windy, with a west wind 30 to 34 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    High: 13 °F

    Heavy Snow
    and Blowing
    Snow

  • Saturday Night

    Saturday Night: Snow. Widespread blowing snow, mainly before 5am. Low around 4. Windy, with a west wind 26 to 30 mph, with gusts as high as 50 mph. Chance of precipitation is 80%.

    Low: 4 °F

    Snow and
    Blowing Snow

  • Sunday

    Sunday: A 50 percent chance of snow, mainly before 11am. Areas of blowing snow. Partly sunny and cold, with a high near 8. Windy.

    High: 8 °F

    Chance Snow
    and Areas
    Blowing Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow showers after 11pm. Mostly cloudy, with a low around 5. Windy.

    Low: 5 °F

    Slight Chance
    Snow Showers
    and Windy

  • Monday

    Monday: A chance of snow showers. Partly sunny, with a high near 12. Windy.

    High: 12 °F

    Chance Snow
    Showers and
    Windy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 9. Windy.

    Low: 9 °F

    Mostly Cloudy
    and Windy

Detailed Forecast

Overnight
A 40 percent chance of snow. Widespread blowing snow, mainly after 5am. Mostly cloudy, with a low around 1. Wind chill values as low as -23. Windy, with a west northwest wind 26 to 29 mph, with gusts as high as 47 mph. Total nighttime snow accumulation of less than a half inch possible.
Friday
Snow likely. Areas of blowing snow. Mostly cloudy and cold, with a high near 10. Wind chill values as low as -19. Breezy, with a west wind 21 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Friday Night
Snow, mainly after 11pm. The snow could be heavy at times. Widespread blowing snow, mainly after 11pm. Temperature rising to around 14 by 5am. Wind chill values as low as -13. Windy, with a west wind 24 to 30 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 4 to 8 inches possible.
Saturday
Snow. The snow could be heavy at times. Widespread blowing snow. High near 13. Wind chill values as low as -15. Windy, with a west wind 30 to 34 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Saturday Night
Snow. Widespread blowing snow, mainly before 5am. Low around 4. Windy, with a west wind 26 to 30 mph, with gusts as high as 50 mph. Chance of precipitation is 80%.
Sunday
A 50 percent chance of snow, mainly before 11am. Areas of blowing snow. Partly sunny and cold, with a high near 8. Windy.
Sunday Night
A 20 percent chance of snow showers after 11pm. Mostly cloudy, with a low around 5. Windy.
Monday
A chance of snow showers. Partly sunny, with a high near 12. Windy.
Monday Night
Mostly cloudy, with a low around 9. Windy.
Tuesday
A chance of snow showers after 11am. Partly sunny, with a high near 21. Very windy.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 15. Very windy.
Wednesday
Snow showers likely. Mostly cloudy, with a high near 21. Windy.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 16. Windy.
Thursday
A chance of snow showers. Partly sunny, with a high near 20. Windy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Saint Marys Glacier CO
 39.84°N 105.69°W (Elev. 12507 ft)
Last Update:
2:21 pm MST Dec 4, 2025
Forecast Valid:
2am MST Dec 5, 2025-6pm MST Dec 11, 2025
 
Forecast Discussion
 
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