Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Plains to the Upper Midwest

A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S and linger through much of the work week. Numerous daily record highs and warm lows are likely. Severe thunderstorms are possible from the southern Plains through the Upper Mississippi Valley. Fire weather concerns are expected to persist across the Four Corners region. 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 39%
Wind Speed SE 6 mph
Barometer 30.26 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 23 Jun 12:55 am MDT
Extended Forecast for

Grand Lake CO

  • Overnight

    Overnight: Mostly clear, with a low around 33. Calm wind becoming east around 5 mph.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 4pm.  Mostly sunny, with a high near 66. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 22 mph.

    High: 66 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 40. East southeast wind 5 to 9 mph becoming calm  after midnight. Winds could gust as high as 18 mph.  Chance of precipitation is 20%.

    Low: 40 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 71. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 71 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight.  Partly cloudy, with a low around 41. Southwest wind 5 to 7 mph becoming calm  in the evening. Winds could gust as high as 15 mph.  Chance of precipitation is 20%.

    Low: 41 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 33. Calm wind becoming east around 5 mph.
Monday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 66. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 22 mph.
Monday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 40. East southeast wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Tuesday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 71. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.
Tuesday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 41. Southwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 20%.
Wednesday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 37.
Thursday
Mostly sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 40.
Friday
Mostly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Lake CO
 40.28°N 105.82°W (Elev. 9275 ft)
9:09 pm MDT Jun 22, 2025
1am MDT Jun 23, 2025-6pm MDT Jun 29, 2025
 
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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