Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

61°F

16°C

Humidity 23%
Wind Speed SW 8 mph
Barometer 30.11 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 17 Jun 3:15 am MDT
Extended Forecast for

Arapahoe Peak CO

Red Flag Warning June 17, 12:00pm until June 17, 08:00pm
Click here for hazard details and duration
Red Flag Warning
  • Overnight

    Overnight: Mostly clear, with a low around 40. Very windy, with a west wind 40 to 43 mph, with gusts as high as 60 mph.

    Low: 40 °F

    Mostly Clear
    and Very
    Windy

  • Wednesday

    Wednesday: Sunny, with a high near 60. Very windy, with a west wind 39 to 44 mph decreasing to 31 to 36 mph in the afternoon. Winds could gust as high as 65 mph.

    High: 60 °F

    Sunny and
    Very Windy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 37. Windy, with a southwest wind 21 to 31 mph decreasing to 9 to 19 mph after midnight. Winds could gust as high as 47 mph.

    Low: 37 °F

    Mostly Clear
    and Windy
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny, with a high near 59. Breezy, with a west wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 59 °F

    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. Breezy, with a west wind 16 to 21 mph decreasing to 9 to 14 mph in the evening. Winds could gust as high as 33 mph.

    Low: 37 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 57. Breezy.

    High: 57 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • 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.

    High: 56 °F

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

  • Saturday Night

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

    Low: 36 °F

    Mostly Clear
    and Very
    Windy

Detailed Forecast

Overnight
Mostly clear, with a low around 40. Very windy, with a west wind 40 to 43 mph, with gusts as high as 60 mph.
Wednesday
Sunny, with a high near 60. Very windy, with a west wind 39 to 44 mph decreasing to 31 to 36 mph in the afternoon. Winds could gust as high as 65 mph.
Wednesday Night
Mostly clear, with a low around 37. Windy, with a southwest wind 21 to 31 mph decreasing to 9 to 19 mph after midnight. Winds could gust as high as 47 mph.
Thursday
Sunny, with a high near 59. Breezy, with a west wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.
Thursday Night
Mostly clear, with a low around 37. Breezy, with a west wind 16 to 21 mph decreasing to 9 to 14 mph in the evening. Winds could gust as high as 33 mph.
Juneteenth
Mostly sunny, with a high near 57. Breezy.
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.
Saturday Night
Mostly clear, with a low around 36. Very windy.
Sunday
A slight chance of snow showers after noon, mixing with rain after 3pm. Some thunder is also possible. Sunny, with a high near 51. Windy.
Sunday Night
A chance of rain and snow showers. Some thunder is also possible. Partly cloudy, with a low around 34. Breezy.
Monday
A chance of rain and snow showers. Some thunder is also possible. Partly sunny, with a high near 51. 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. Mostly sunny, with a high near 54. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Arapahoe Peak CO
 40.02°N 105.65°W (Elev. 12680 ft)
12:46 am MDT Jun 17, 2026
3am MDT Jun 17, 2026-6pm MDT Jun 23, 2026
 
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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