Severe Weather and Heavy Rain from the Ohio Valley to the Mid-Atlantic; Heat Persists in the South-Central U.S.

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected across portions of the Ohio Valley into southern Mid-Atlantic and Carolinas. Rounds of strong thunderstorms are expected to develop across the northern and central Plains. Sweltering heat remains most persistent across the South-Central Plains and Lower/Middle Mississippi Valley through next week. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

88°F

31°C

Humidity 63%
Wind Speed Vrbl 3 mph
Barometer 29.97 in (1013.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 5 Sep 11:53 am EDT
Extended Forecast for

2 Miles ESE Knoxville TN

Heat Advisory September 5, 12:23pm until September 5, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 5, 12:23pm until September 5, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 97 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight.  Partly cloudy, with a low around 72. Calm wind.  Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 3pm.  Mostly sunny and hot, with a high near 91. Heat index values as high as 99. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69. Northeast wind around 5 mph.

    Low: 69 °F

    Partly Cloudy

  • Labor Day

    Labor Day: A 40 percent chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 90. Calm wind.

    High: 90 °F

    Mostly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 91. Calm wind.

    High: 91 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms before 4pm, then a chance of showers between 4pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind. Chance of precipitation is 40%.
Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.
Sunday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 99. Calm wind becoming northeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 69. Northeast wind around 5 mph.
Labor Day
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Calm wind.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 68. Calm wind.
Tuesday
Sunny and hot, with a high near 91. Calm wind.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny and hot, with a high near 92.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 93.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Knoxville TN
 35.96°N 83.91°W (Elev. 942 ft)
11:01 am EDT Sep 5, 2026
12pm EDT Sep 5, 2026-6pm EDT Sep 11, 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