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

32°F

0°C

Humidity 96%
Wind Speed Calm
Barometer 30.20 in
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 21 May 2:15 am MDT
Extended Forecast for

5 Miles SSE Trail Ridge CO

  • Overnight

    Overnight: Mostly clear, with a low around 21. West southwest wind around 8 mph.

    Low: 21 °F

    Mostly Clear

  • Thursday

    Thursday: A 50 percent chance of snow showers, mainly after noon. Some thunder is also possible. Partly sunny, with a high near 39. West southwest wind 9 to 13 mph, with gusts as high as 23 mph. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Slight Chance
    Snow Showers
    then Chance
    Snow Showers

  • Thursday Night

    Thursday Night: Snow showers likely, mainly before midnight. Some thunder is also possible. Mostly cloudy, with a low around 23. West wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 23 °F

    Snow Showers
    Likely then
    Chance Snow
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 38. West wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 38 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of snow showers. Mostly cloudy, with a low around 24. West southwest wind 5 to 10 mph, with gusts as high as 17 mph.

    Low: 24 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: A 30 percent chance of snow showers, mainly after noon. Some thunder is also possible. Mostly sunny, with a high near 41. Breezy.

    High: 41 °F

    Chance Snow
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 27. Breezy.

    Low: 27 °F

    Mostly Clear
    then Clear
    and Breezy

  • Sunday

    Sunday: Sunny, with a high near 50. Breezy.

    High: 50 °F

    Sunny and
    Breezy then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 21. West southwest wind around 8 mph.
Thursday
A 50 percent chance of snow showers, mainly after noon. Some thunder is also possible. Partly sunny, with a high near 39. West southwest wind 9 to 13 mph, with gusts as high as 23 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 23. West wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Friday
Mostly sunny, with a high near 38. West wind 7 to 14 mph, with gusts as high as 23 mph.
Friday Night
A 30 percent chance of snow showers. Mostly cloudy, with a low around 24. West southwest wind 5 to 10 mph, with gusts as high as 17 mph.
Saturday
A 30 percent chance of snow showers, mainly after noon. Some thunder is also possible. Mostly sunny, with a high near 41. Breezy.
Saturday Night
Mostly clear, with a low around 27. Breezy.
Sunday
Sunny, with a high near 50. Breezy.
Sunday Night
Mostly clear, with a low around 34.
Memorial Day
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 58.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 36.
Tuesday
Showers and possibly a thunderstorm. Partly sunny, with a high near 55.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 33.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Trail Ridge CO
 40.37°N 105.72°W (Elev. 10899 ft)
Last Update:
12:46 am MDT May 21, 2026
Forecast Valid:
2am MDT May 21, 2026-6pm MDT May 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation