Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

54°F

12°C

Humidity 56%
Wind Speed Calm
Barometer 30.32 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 16 Jul 2:15 am MDT
Extended Forecast for

3 Miles ENE Keystone CO

  • Overnight

    Overnight: Partly cloudy, with a low around 46. South southwest wind around 6 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm.  Partly sunny, with a high near 70. South southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 16 mph.  Chance of precipitation is 70%.

    High: 70 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 44. Northwest wind around 6 mph becoming light and variable  after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 50%.

    Low: 44 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 69. Light and variable wind becoming west northwest 5 to 7 mph in the morning. Winds could gust as high as 18 mph.  Chance of precipitation is 60%.

    High: 69 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 46. West wind around 6 mph becoming calm  after midnight. Winds could gust as high as 17 mph.  Chance of precipitation is 30%.

    Low: 46 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Showers and thunderstorms likely after noon.  Partly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 45.

    Low: 45 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 46. South southwest wind around 6 mph.
Wednesday
A slight chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Partly sunny, with a high near 70. South southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 44. Northwest wind around 6 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Thursday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 69. Light and variable wind becoming west northwest 5 to 7 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 46. West wind around 6 mph becoming calm after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 30%.
Friday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 69.
Friday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 46.
Saturday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 67.
Saturday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.
Sunday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 44.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 68.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 45.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Keystone CO
 39.63°N 105.93°W (Elev. 10827 ft)
2:47 pm MDT Jul 15, 2025
2am MDT Jul 16, 2025-6pm MDT Jul 22, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database