Severe Thunderstorms and Heavy Rain Across the Ohio Valley;

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Partly Cloudy

91°F

33°C

Humidity 52%
Wind Speed W 6 mph
Barometer 29.99 in (1014.0 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 11 Aug 6:53 pm EDT
Extended Forecast for

Knoxville, McGhee Tyson Airport TN

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly between 11pm and 2am.  Mostly cloudy, with a low around 73. South wind around 5 mph.

    Low: 73 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 4pm.  Mostly sunny and hot, with a high near 90. Heat index values as high as 101. Southwest wind 5 to 10 mph.

    High: 90 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 73. Southwest wind around 5 mph.  Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers before 7am, then a chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 91. Heat index values as high as 102. Southwest wind around 5 mph.  Chance of precipitation is 30%.

    High: 91 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Mostly cloudy, with a low around 76. South wind around 5 mph.

    Low: 76 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 11am.  Mostly sunny and hot, with a high near 93. West wind around 5 mph.  Chance of precipitation is 30%.

    High: 93 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 93.

    High: 93 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 10 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 75.

    Low: 75 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly between 11pm and 2am. Mostly cloudy, with a low around 73. South wind around 5 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 90. Heat index values as high as 101. Southwest wind 5 to 10 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Southwest wind around 5 mph. Chance of precipitation is 30%.
Thursday
A slight chance of showers before 7am, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 102. Southwest wind around 5 mph. Chance of precipitation is 30%.
Thursday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 76. South wind around 5 mph.
Friday
A chance of showers, with thunderstorms also possible after 11am. Mostly sunny and hot, with a high near 93. West wind around 5 mph. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 75. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 93.
Saturday Night
A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75.
Sunday
Mostly sunny and hot, with a high near 95.
Sunday Night
Mostly clear, with a low around 76.
Monday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 96.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Knoxville, McGhee Tyson Airport TN
 35.8°N 83.98°W (Elev. 955 ft)
7:06 pm EDT Aug 11, 2026
7pm EDT Aug 11, 2026-6pm EDT Aug 18, 2026
 
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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