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

Critical Fire Weather in the Southern Plains; Severe Storms in the Ohio Valley

Strong winds and low humidity will create elevated to critical fire weather conditions across the Southern Plains on Thursday. Strong to severe thunderstorms are forecast in the Ohio Valley late Thursday into Friday morning, with the strongest storms capable of producing very large hail, damaging winds, and a few tornadoes. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

39°F

4°C

Humidity 63%
Wind Speed Calm
Barometer 30.16 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 26 Mar 3:35 am MDT
Extended Forecast for

Saint Marys Glacier CO

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 43. Breezy, with a west wind 22 to 24 mph, with gusts as high as 39 mph.

    Low: 43 °F

    Mostly Clear
    and Breezy

  • Thursday

    Thursday: A 30 percent chance of showers, mainly after 3pm. Increasing clouds, with a high near 56. Windy, with a west wind 17 to 25 mph, with gusts as high as 40 mph.

    High: 56 °F

    Sunny and
    Windy then
    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Snow showers likely, possibly mixed with rain before midnight, then a chance of snow showers. Mostly cloudy, with a low around 25. Blustery, with a west northwest wind 6 to 15 mph becoming east southeast after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Rain/Snow
    Likely and
    Blustery then
    Chance Snow
    Showers

  • Friday

    Friday: Snow showers likely, mainly before noon. Mostly cloudy, with a high near 35. Breezy, with a southeast wind 9 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Snow Showers
    Likely and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28. Breezy, with a south southeast wind 7 to 17 mph becoming west after midnight. Winds could gust as high as 36 mph.

    Low: 28 °F

    Partly Cloudy
    then Partly
    Cloudy and
    Breezy

  • Saturday

    Saturday: A chance of snow showers after noon, mixing with rain after 3pm. Mostly sunny, with a high near 51. Windy. Chance of precipitation is 30%.

    High: 51 °F

    Mostly Sunny
    and Breezy
    then Chance
    Rain/Snow and
    Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 35. Breezy.

    Low: 35 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: A slight chance of snow showers after noon. Mostly sunny, with a high near 50. Windy.

    High: 50 °F

    Slight Chance
    Snow Showers
    and Windy

  • Sunday Night

    Sunday Night: A slight chance of snow showers before midnight. Mostly cloudy, with a low around 34. Breezy.

    Low: 34 °F

    Breezy.
    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 43. Breezy, with a west wind 22 to 24 mph, with gusts as high as 39 mph.
Thursday
A 30 percent chance of showers, mainly after 3pm. Increasing clouds, with a high near 56. Windy, with a west wind 17 to 25 mph, with gusts as high as 40 mph.
Thursday Night
Snow showers likely, possibly mixed with rain before midnight, then a chance of snow showers. Mostly cloudy, with a low around 25. Blustery, with a west northwest wind 6 to 15 mph becoming east southeast after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow showers likely, mainly before noon. Mostly cloudy, with a high near 35. Breezy, with a southeast wind 9 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Partly cloudy, with a low around 28. Breezy, with a south southeast wind 7 to 17 mph becoming west after midnight. Winds could gust as high as 36 mph.
Saturday
A chance of snow showers after noon, mixing with rain after 3pm. Mostly sunny, with a high near 51. Windy. Chance of precipitation is 30%.
Saturday Night
Mostly clear, with a low around 35. Breezy.
Sunday
A slight chance of snow showers after noon. Mostly sunny, with a high near 50. Windy.
Sunday Night
A slight chance of snow showers before midnight. Mostly cloudy, with a low around 34. Breezy.
Monday
A chance of rain and snow showers after noon. Partly sunny, with a high near 48. Breezy.
Monday Night
A chance of rain and snow showers. Partly cloudy, with a low around 33. Breezy.
Tuesday
A chance of snow showers. Partly sunny, with a high near 45. Windy.
Tuesday Night
Snow showers likely. Mostly cloudy, with a low around 29. Breezy.
Wednesday
Snow showers. Mostly cloudy, with a high near 36. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.82°N 105.63°W (Elev. 10735 ft)
Last Update:
3:41 am MDT Mar 26, 2026
Forecast Valid:
3am MDT Mar 26, 2026-6pm MDT Apr 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation