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

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 >

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

57°F

14°C

Humidity 26%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 17 Jun 5:15 am MDT
Extended Forecast for

LONG'S PEAK CO

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

  • Today

    Today: Sunny, with a high near 61. Very windy, with a west wind 31 to 40 mph, with gusts as high as 60 mph.

    High: 61 °F

    Sunny and
    Very Windy

  • Tonight

    Tonight: Mostly clear, with a low around 37. Windy, with a west wind 21 to 31 mph decreasing to 7 to 17 mph. 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 10 to 16 mph, with gusts as high as 25 mph.

    High: 59 °F

    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 38. West wind 6 to 14 mph, with gusts as high as 22 mph.

    Low: 38 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 57. West wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 57 °F

    Mostly Sunny

  • Friday Night

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

    Low: 40 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 56. Very windy.

    High: 56 °F

    Sunny and
    Windy then
    Slight Chance
    T-storms and
    Very Windy

  • Saturday Night

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

    Low: 36 °F

    Mostly Clear
    and Very
    Windy

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon. Sunny, with a high near 51. Windy.

    High: 51 °F

    Windy. Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 61. Very windy, with a west wind 31 to 40 mph, with gusts as high as 60 mph.
Tonight
Mostly clear, with a low around 37. Windy, with a west wind 21 to 31 mph decreasing to 7 to 17 mph. Winds could gust as high as 47 mph.
Thursday
Sunny, with a high near 59. Breezy, with a west wind 10 to 16 mph, with gusts as high as 25 mph.
Thursday Night
Mostly clear, with a low around 38. West wind 6 to 14 mph, with gusts as high as 22 mph.
Juneteenth
Mostly sunny, with a high near 57. West wind 9 to 14 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 40.
Saturday
A 20 percent chance of showers and thunderstorms after noon. 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 showers and thunderstorms after noon. Sunny, with a high near 51. Windy.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 35. Breezy.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 51.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 37.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
LONG'S PEAK CO
 40.24°N 105.62°W (Elev. 12064 ft)
Last Update:
12:46 am MDT Jun 17, 2026
Forecast Valid:
5am 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