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

2°F

-17°C

Humidity 83%
Wind Speed Calm
Barometer 30.61 in
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Last update 30 Dec 6:15 am MST
Extended Forecast for

3 Miles WNW Saint Marys Glacier CO

  • Today

    Today: Sunny, with a high near 21. Wind chill values as low as -8. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 34 mph.

    High: 21 °F

    Sunny and
    Blustery

  • Tonight

    Tonight: Mostly clear, with a low around 14. Wind chill values as low as -4. Breezy, with a west wind 17 to 21 mph, with gusts as high as 34 mph.

    Low: 14 °F

    Mostly Clear
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 27. Wind chill values as low as -3. Blustery, with a west northwest wind 17 to 20 mph, with gusts as high as 33 mph.

    High: 27 °F

    Mostly Sunny
    and Blustery

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 18. Breezy, with a west wind 18 to 20 mph, with gusts as high as 32 mph.

    Low: 18 °F

    Mostly Cloudy
    and Breezy

  • New Year's Day

    New Year's Day: Snow likely, mainly after 11am.  Cloudy, with a high near 24. Breezy, with a west wind 17 to 20 mph, with gusts as high as 33 mph.  Chance of precipitation is 60%.

    High: 24 °F

    Snow Likely
    and Breezy

  • Thursday Night

    Thursday Night: Snow likely.  Cloudy, with a low around 18. Breezy.  Chance of precipitation is 60%.

    Low: 18 °F

    Snow Likely
    and Breezy

  • Friday

    Friday: Snow likely, mainly before 11am.  Mostly cloudy, with a high near 22. Breezy.  Chance of precipitation is 60%.

    High: 22 °F

    Snow Likely
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 16. Breezy.

    Low: 16 °F

    Mostly Cloudy
    and Breezy

  • Saturday

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

    High: 26 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

Today
Sunny, with a high near 21. Wind chill values as low as -8. Blustery, with a west northwest wind 17 to 22 mph, with gusts as high as 34 mph.
Tonight
Mostly clear, with a low around 14. Wind chill values as low as -4. Breezy, with a west wind 17 to 21 mph, with gusts as high as 34 mph.
Wednesday
Mostly sunny, with a high near 27. Wind chill values as low as -3. Blustery, with a west northwest wind 17 to 20 mph, with gusts as high as 33 mph.
Wednesday Night
Mostly cloudy, with a low around 18. Breezy, with a west wind 18 to 20 mph, with gusts as high as 32 mph.
New Year's Day
Snow likely, mainly after 11am. Cloudy, with a high near 24. Breezy, with a west wind 17 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.
Thursday Night
Snow likely. Cloudy, with a low around 18. Breezy. Chance of precipitation is 60%.
Friday
Snow likely, mainly before 11am. Mostly cloudy, with a high near 22. Breezy. Chance of precipitation is 60%.
Friday Night
Mostly cloudy, with a low around 16. 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. Partly sunny, with a high near 22. Breezy.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 11. Breezy.
Monday
A chance of snow. Partly sunny, with a high near 18. Breezy.
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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)
3:26 am MST Dec 30, 2025
6am MST Dec 30, 2025-6pm MST Jan 5, 2026
 
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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