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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

74°F

23°C

Humidity 17%
Wind Speed W 12 G 21 mph
Barometer 30.08 in
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 17 Jun 8:15 pm MDT
Extended Forecast for

Trail Ridge CO

  • Tonight

    Tonight: Mostly clear, with a low around 35. Breezy, with a west northwest wind 8 to 18 mph becoming south southwest after midnight. Winds could gust as high as 30 mph.

    Low: 35 °F

    Mostly Clear
    and Breezy
    then Clear

  • Thursday

    Thursday: Sunny, with a high near 65. Breezy, with a west northwest wind 10 to 17 mph, with gusts as high as 28 mph.

    High: 65 °F

    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 37. Breezy, with a west wind 8 to 15 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 67. West wind 8 to 11 mph, with gusts as high as 22 mph.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. West northwest wind around 9 mph becoming south southeast in the evening. Winds could gust as high as 17 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 66. Windy.

    High: 66 °F

    Sunny and
    Breezy then
    Slight Chance
    T-storms and
    Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36. Breezy.

    Low: 36 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon. Sunny, with a high near 61.

    High: 61 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 35. Breezy, with a west northwest wind 8 to 18 mph becoming south southwest after midnight. Winds could gust as high as 30 mph.
Thursday
Sunny, with a high near 65. Breezy, with a west northwest wind 10 to 17 mph, with gusts as high as 28 mph.
Thursday Night
Partly cloudy, with a low around 37. Breezy, with a west wind 8 to 15 mph, with gusts as high as 24 mph.
Juneteenth
Mostly sunny, with a high near 67. West wind 8 to 11 mph, with gusts as high as 22 mph.
Friday Night
Partly cloudy, with a low around 38. West northwest wind around 9 mph becoming south southeast in the evening. Winds could gust as high as 17 mph.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 66. Windy.
Saturday Night
Mostly clear, with a low around 36. Breezy.
Sunday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 61.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 34.
Monday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 62.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 35.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 36.
Wednesday
Sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Trail Ridge CO
 40.43°N 105.75°W (Elev. 11864 ft)
Last Update:
12:46 pm MDT Jun 17, 2026
Forecast Valid:
8pm MDT Jun 17, 2026-6pm MDT Jun 24, 2026
 
Forecast Discussion
 
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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