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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair and Breezy

80°F

27°C

Humidity 13%
Wind Speed W 24 G 32 mph
Barometer 30.06 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Jun 12:55 pm MDT
Extended Forecast for

Arapahoe Peak CO

Red Flag Warning until June 17, 08:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning until June 17, 08:00pm

    NOW until 8:00pm Wed

    Red Flag Warning

  • This Afternoon

    High: 60 °F

    Sunny and
    Windy

  • Tonight

    Tonight: Mostly clear, with a low around 35. Windy, with a west northwest wind 22 to 32 mph decreasing to 11 to 21 mph after midnight. Winds could gust as high as 48 mph.

    Low: 35 °F

    Mostly Clear
    and Windy
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny, with a high near 57. Breezy, with a west northwest wind 13 to 22 mph, with gusts as high as 34 mph.

    High: 57 °F

    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38. Breezy, with a west wind 17 to 22 mph decreasing to 10 to 15 mph in the evening. Winds could gust as high as 29 mph.

    Low: 38 °F

    Partly Cloudy
    and Breezy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 56. West wind 11 to 14 mph becoming north in the afternoon. Winds could gust as high as 23 mph.

    High: 56 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 40. Breezy.

    Low: 40 °F

    Partly Cloudy
    and Breezy

  • Saturday

    Saturday: A slight chance of rain and snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 56. Very windy. Chance of precipitation is 20%.

    High: 56 °F

    Sunny and
    Windy then
    Slight Chance
    Rain/Snow and
    Very Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37. Very windy.

    Low: 37 °F

    Mostly Clear
    and Very
    Windy

Detailed Forecast

This Afternoon
Sunny, with a high near 60. Windy, with a west wind 32 to 34 mph, with gusts as high as 50 mph.
Tonight
Mostly clear, with a low around 35. Windy, with a west northwest wind 22 to 32 mph decreasing to 11 to 21 mph after midnight. Winds could gust as high as 48 mph.
Thursday
Sunny, with a high near 57. Breezy, with a west northwest wind 13 to 22 mph, with gusts as high as 34 mph.
Thursday Night
Partly cloudy, with a low around 38. Breezy, with a west wind 17 to 22 mph decreasing to 10 to 15 mph in the evening. Winds could gust as high as 29 mph.
Juneteenth
Mostly sunny, with a high near 56. West wind 11 to 14 mph becoming north in the afternoon. Winds could gust as high as 23 mph.
Friday Night
Partly cloudy, with a low around 40. Breezy.
Saturday
A slight chance of rain and snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 56. Very windy. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 37. Very windy.
Sunday
Sunny, with a high near 52. Windy.
Sunday Night
A slight chance of rain and snow showers before 9pm, then a slight chance of rain showers between 9pm and midnight. Some thunder is also possible. Partly cloudy, with a low around 34. Breezy.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 52. Breezy.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 36. Breezy.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 55. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arapahoe Peak CO
 40.02°N 105.65°W (Elev. 12680 ft)
Last Update:
12:46 pm MDT Jun 17, 2026
Forecast Valid:
1pm MDT Jun 17, 2026-6pm MDT Jun 23, 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