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

Areas of Excessive Rainfall and Extreme Heat; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding Tuesday. Hot to extremely hot temperatures are in place through Tuesday across much of the western U.S. and northern New England. Tropical Storm Erin is forecast to become a Major Hurricane by this weekend as it moves across the central Atlantic Ocean. Monitor future forecasts for any East Coast impacts. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville Downtown Airport (KDKX)

Lat: 35.97°NLon: 83.87°WElev: 827ft.

Partly Cloudy

72°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 12 Aug 2:35 am EDT
Extended Forecast for

Powell TNSimilar City Names

  • Overnight

    Overnight: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 2pm. Mostly cloudy, with a high near 85. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    Showers then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 86. Southwest wind around 5 mph. Chance of precipitation is 60%.

    High: 86 °F

    Chance
    T-storms and
    Patchy Fog
    then T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%.

    Low: 71 °F

    T-storms
    Likely

  • Thursday

    Thursday: A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 87. Calm wind. Chance of precipitation is 40%.

    High: 87 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 71. Calm wind.
Tuesday
Showers and thunderstorms likely, mainly after 2pm. Mostly cloudy, with a high near 85. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 86. Southwest wind around 5 mph. Chance of precipitation is 60%.
Wednesday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%.
Thursday
A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 87. Calm wind. Chance of precipitation is 40%.
Thursday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90.
Friday Night
A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71.
Saturday
Mostly sunny and hot, with a high near 92.
Saturday Night
Mostly clear, with a low around 71.
Sunday
Mostly sunny and hot, with a high near 91.
Sunday Night
Partly cloudy, with a low around 71.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Powell TNSimilar City Names
 36.03°N 84.02°W (Elev. 1001 ft)
Last Update:
1:38 am EDT Aug 12, 2025
Forecast Valid:
2am EDT Aug 12, 2025-6pm EDT Aug 18, 2025
 
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Additional Resources

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Chance of Precipitation