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

Heavy Rainfall in the Southern Plains and Mississippi Valley; Thunderstorms in Eastern Colorado on Thursday

A multiple day heavy rainfall event will begin to set up from the Southern Plains into the Mississippi Valley Thursday, peaking in intensity over the holiday weekend. Widely scattered thunderstorms are expected to develop across eastern Colorado Thursday afternoon and evening. Large hail will be the primary hazard. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

31°F

-1°C

Humidity 93%
Wind Speed NE 3 mph
Barometer 30.20 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 21 May 2:55 am MDT
Extended Forecast for

3 Miles WNW LONG'S PEAK CO

  • Overnight

    Overnight: Mostly clear, with a low around 16. Southwest wind around 8 mph.

    Low: 16 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of snow showers, mainly after noon. Some thunder is also possible. Partly sunny, with a high near 33. Breezy, with a west southwest wind 9 to 15 mph, with gusts as high as 26 mph. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Chance Snow
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Snow showers likely, mainly before midnight. Some thunder is also possible. Mostly cloudy, with a low around 18. West wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 18 °F

    Snow Showers
    Likely then
    Chance Snow
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 32. West wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 32 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of snow showers. Mostly cloudy, with a low around 20. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 20 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: A 30 percent chance of snow showers, mainly after noon. Some thunder is also possible. Partly sunny, with a high near 35. Breezy.

    High: 35 °F

    Chance Snow
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 22. Breezy.

    Low: 22 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 16. Southwest wind around 8 mph.
Thursday
A 40 percent chance of snow showers, mainly after noon. Some thunder is also possible. Partly sunny, with a high near 33. Breezy, with a west southwest wind 9 to 15 mph, with gusts as high as 26 mph. New snow accumulation of less than a half inch possible.
Thursday Night
Snow showers likely, mainly before midnight. Some thunder is also possible. Mostly cloudy, with a low around 18. West wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Friday
Mostly sunny, with a high near 32. West wind 9 to 14 mph, with gusts as high as 22 mph.
Friday Night
A 40 percent chance of snow showers. Mostly cloudy, with a low around 20. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Saturday
A 30 percent chance of snow showers, mainly after noon. Some thunder is also possible. Partly sunny, with a high near 35. Breezy.
Saturday Night
Mostly clear, with a low around 22. Breezy.
Sunday
Sunny, with a high near 42.
Sunday Night
Partly cloudy, with a low around 29.
Memorial Day
A chance of snow showers after noon, mixing with rain after 3pm. Some thunder is also possible. Mostly sunny, with a high near 46.
Monday Night
A chance of rain and snow showers. Some thunder is also possible. Mostly cloudy, with a low around 30.
Tuesday
Rain and snow showers. Some thunder is also possible. Mostly cloudy, with a high near 46.
Tuesday Night
A chance of rain and snow showers. Some thunder is also possible. Mostly cloudy, with a low around 29.
Wednesday
A chance of rain and snow showers. Some thunder is also possible. Mostly sunny, with a high near 43. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW LONG'S PEAK CO
 40.26°N 105.68°W (Elev. 12044 ft)
Last Update:
12:46 am MDT May 21, 2026
Forecast Valid:
3am MDT May 21, 2026-6pm MDT May 27, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation