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

Boulder Municipal Airport (KBDU)

Lat: 40.04°NLon: 105.23°WElev: 5288ft.

Fair

64°F

18°C

Humidity 56%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 21 Sep 9:55 am MDT
Extended Forecast for

Boulder CO

  • Today

    Today: Sunny, with a high near 73. Calm wind becoming east around 6 mph in the afternoon.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 51. East wind around 5 mph becoming calm  after midnight.

    Low: 51 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm.  Increasing clouds, with a high near 79. Calm wind becoming east around 6 mph in the afternoon.  Chance of precipitation is 20%.

    High: 79 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 9pm.  Mostly cloudy, with a low around 55. West southwest wind 5 to 8 mph becoming calm  after midnight.

    Low: 55 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm.  Mostly cloudy, with a high near 76. Calm wind becoming east northeast around 5 mph in the afternoon.  Chance of precipitation is 30%.

    High: 76 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday 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 54. Chance of precipitation is 20%.

    Low: 54 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 73. Chance of precipitation is 30%.

    High: 73 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 53.

    Low: 53 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 73. Calm wind becoming east around 6 mph in the afternoon.
Tonight
Partly cloudy, with a low around 51. East wind around 5 mph becoming calm after midnight.
Tuesday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 79. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 55. West southwest wind 5 to 8 mph becoming calm after midnight.
Wednesday
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 76. Calm wind becoming east northeast around 5 mph in the afternoon. Chance of precipitation is 30%.
Wednesday 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 54. Chance of precipitation is 20%.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 73. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 53.
Friday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Sunny, with a high near 81.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 54.
Sunday
A slight chance of showers. Mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Boulder CO
 40°N 105.25°W (Elev. 5377 ft)
12:46 am MDT Sep 21, 2026
10am MDT Sep 21, 2026-6pm MDT Sep 27, 2026
 
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Additional Resources

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