Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

52°F

11°C

Humidity 59%
Wind Speed Calm
Barometer 30.45 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 21 Sep 10:35 am MDT
Extended Forecast for

10 Miles NNE Silverthorne CO

  • Today

    Today: Mostly sunny, with a high near 63. West northwest wind 5 to 8 mph.

    High: 63 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 34. Calm wind becoming southeast around 6 mph in the evening.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after noon.  Increasing clouds, with a high near 67. West wind 5 to 7 mph becoming light and variable  in the afternoon.

    High: 67 °F

    Sunny then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 36. South wind around 5 mph becoming calm  after midnight.  Chance of precipitation is 40%.

    Low: 36 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after noon.  Mostly cloudy, with a high near 60. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 60 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 62. Chance of precipitation is 50%.

    High: 62 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 63.

    High: 63 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 63. West northwest wind 5 to 8 mph.
Tonight
Partly cloudy, with a low around 34. Calm wind becoming southeast around 6 mph in the evening.
Tuesday
A 40 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 67. West wind 5 to 7 mph becoming light and variable in the afternoon.
Tuesday Night
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 36. South wind around 5 mph becoming calm after midnight. Chance of precipitation is 40%.
Wednesday
A 30 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 60. Calm wind becoming west northwest around 6 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 62. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 36.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 63.
Friday Night
A slight chance of showers before midnight. Partly cloudy, with a low around 35.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 67.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 35.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NNE Silverthorne CO
 39.8°N 106.03°W (Elev. 8996 ft)
12:46 am MDT Sep 21, 2026
11am MDT Sep 21, 2026-6pm MDT Sep 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

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