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

67°F

19°C

Humidity 22%
Wind Speed SE 3 mph
Barometer 30.12 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 17 Jun 9:55 pm MDT
Extended Forecast for

2 Miles SSW LONG'S PEAK CO

  • Tonight

    Tonight: Mostly clear, with a low around 37. West northwest wind 7 to 9 mph becoming southwest after midnight. Winds could gust as high as 15 mph.

    Low: 37 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 62. Breezy, with a west wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 62 °F

    Sunny then
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. West wind 7 to 14 mph, with gusts as high as 24 mph.

    Low: 41 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 61. West wind 7 to 10 mph becoming south in the afternoon. Winds could gust as high as 21 mph.

    High: 61 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 42. South southeast wind 7 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 62. Very windy.

    High: 62 °F

    Sunny and
    Very Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. Very windy.

    Low: 39 °F

    Mostly Clear
    and Very
    Windy

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon. Sunny, with a high near 57. Breezy.

    High: 57 °F

    Breezy. Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 37. West northwest wind 7 to 9 mph becoming southwest after midnight. Winds could gust as high as 15 mph.
Thursday
Sunny, with a high near 62. Breezy, with a west wind 9 to 15 mph, with gusts as high as 24 mph.
Thursday Night
Partly cloudy, with a low around 41. West wind 7 to 14 mph, with gusts as high as 24 mph.
Juneteenth
Mostly sunny, with a high near 61. West wind 7 to 10 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Partly cloudy, with a low around 42. South southeast wind 7 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph.
Saturday
Sunny, with a high near 62. Very windy.
Saturday Night
Mostly clear, with a low around 39. Very windy.
Sunday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 57. Breezy.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 37.
Monday
Showers and thunderstorms likely after noon. Mostly sunny, with a high near 56.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 39.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 59.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 62. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW LONG'S PEAK CO
 40.22°N 105.61°W (Elev. 11161 ft)
Last Update:
12:46 pm MDT Jun 17, 2026
Forecast Valid:
10pm MDT Jun 17, 2026-6pm MDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation