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

Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

29°F

-2°C

Humidity 52%
Wind Speed N 3 mph
Barometer 30.50 in
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Last update 30 Dec 1:55 pm MST
Extended Forecast for

3 Miles WNW Saint Marys Glacier CO

  • This Afternoon

    This Afternoon: Sunny, with a high near 22. Blustery, with a west northwest wind 16 to 18 mph, with gusts as high as 30 mph.

    High: 22 °F

    Sunny and
    Blustery

  • Tonight

    Tonight: Mostly clear, with a low around 15. Wind chill values as low as -2. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 34 mph.

    Low: 15 °F

    Mostly Clear
    and Blustery

  • Wednesday

    Wednesday: Mostly sunny, with a high near 29. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 34 mph.

    High: 29 °F

    Mostly Sunny
    and Blustery

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 17. Blustery, with a west wind 16 to 18 mph, with gusts as high as 32 mph.

    Low: 17 °F

    Mostly Cloudy
    and Blustery

  • New Year's Day

    New Year's Day: Snow, mainly after 11am. High near 23. Breezy, with a west wind 18 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.

    High: 23 °F

    Snow and
    Breezy

  • Thursday Night

    Thursday Night: Snow. Low around 19. Breezy. Chance of precipitation is 80%.

    Low: 19 °F

    Snow and
    Breezy

  • Friday

    Friday: Snow likely, mainly before 11am. Mostly cloudy, with a high near 21. Windy. Chance of precipitation is 70%.

    High: 21 °F

    Snow Likely
    and Windy

  • Friday Night

    Friday Night: A slight chance of snow before 11pm. Mostly cloudy, with a low around 15. Breezy.

    Low: 15 °F

    Breezy.
    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 26. Breezy.

    High: 26 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 22. Blustery, with a west northwest wind 16 to 18 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 15. Wind chill values as low as -2. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 34 mph.
Wednesday
Mostly sunny, with a high near 29. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 34 mph.
Wednesday Night
Mostly cloudy, with a low around 17. Blustery, with a west wind 16 to 18 mph, with gusts as high as 32 mph.
New Year's Day
Snow, mainly after 11am. High near 23. Breezy, with a west wind 18 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.
Thursday Night
Snow. Low around 19. Breezy. Chance of precipitation is 80%.
Friday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 21. Windy. Chance of precipitation is 70%.
Friday Night
A slight chance of snow before 11pm. Mostly cloudy, with a low around 15. Breezy.
Saturday
Mostly sunny, with a high near 26. Breezy.
Saturday Night
Partly cloudy, with a low around 13. Breezy.
Sunday
A chance of snow. Mostly sunny, with a high near 23. Breezy.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 12. Breezy.
Monday
A chance of snow. Partly sunny, with a high near 19. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Saint Marys Glacier CO
 39.84°N 105.69°W (Elev. 12507 ft)
Last Update:
1:46 pm MST Dec 30, 2025
Forecast Valid:
2pm MST Dec 30, 2025-6pm MST Jan 5, 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