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

49°F

9°C

Humidity 60%
Wind Speed SE 3 mph
Barometer 30.18 in
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 18 Jun 2:55 am MDT
Extended Forecast for

3 Miles N Arapahoe Peak CO

Fire Weather Watch June 20, 12:00pm until June 20, 09:00pm
Click here for hazard details and duration
Fire Weather Watch

  • Overnight

    Overnight: Clear, with a low around 36. Southwest wind around 10 mph, with gusts as high as 16 mph.

    Low: 36 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 59. Breezy, with a west wind 10 to 18 mph, with gusts as high as 30 mph.

    High: 59 °F

    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40. Breezy, with a west wind 8 to 17 mph, with gusts as high as 28 mph.

    Low: 40 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 60. West wind 7 to 14 mph becoming northeast in the afternoon. Winds could gust as high as 23 mph.

    High: 60 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41. East wind 8 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 60. Windy.

    High: 60 °F

    Sunny and
    Breezy then
    Slight Chance
    T-storms and
    Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. Windy.

    Low: 38 °F

    Mostly Clear
    and Windy

  • Sunday

    Sunday: Sunny, with a high near 54. Breezy.

    High: 54 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 35. Breezy.

    Low: 35 °F

    Chance
    T-storms and
    Breezy then
    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 36. Southwest wind around 10 mph, with gusts as high as 16 mph.
Thursday
Sunny, with a high near 59. Breezy, with a west wind 10 to 18 mph, with gusts as high as 30 mph.
Thursday Night
Mostly clear, with a low around 40. Breezy, with a west wind 8 to 17 mph, with gusts as high as 28 mph.
Juneteenth
Mostly sunny, with a high near 60. West wind 7 to 14 mph becoming northeast in the afternoon. Winds could gust as high as 23 mph.
Friday Night
Partly cloudy, with a low around 41. East wind 8 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 60. Windy.
Saturday Night
Mostly clear, with a low around 38. Windy.
Sunday
Sunny, with a high near 54. Breezy.
Sunday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 35. Breezy.
Monday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 54. Breezy.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 37. Breezy.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 57. Breezy.
Tuesday Night
Partly cloudy, with a low around 39.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 61. Breezy.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Arapahoe Peak CO
 40.06°N 105.66°W (Elev. 12014 ft)
Last Update:
12:46 am MDT Jun 18, 2026
Forecast Valid:
3am MDT Jun 18, 2026-6pm MDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation