Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

65°F

18°C

Humidity 90%
Wind Speed Calm
Barometer 30.07 in (1017.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 26 Aug 7:53 am EDT
Extended Forecast for

6 Miles SSW Knoxville TN

  • Today

    Today: Mostly sunny and hot, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 90 °F

    Hot

  • Tonight

    Tonight: A slight chance of showers before 4am, then a slight chance of showers after 5am.  Mostly cloudy, with a low around 70. Calm wind.  Chance of precipitation is 20%.

    Low: 70 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 3pm.  Mostly cloudy through mid morning, then becoming sunny and hot, with a high near 90. Heat index values as high as 95. Calm wind becoming southwest around 5 mph.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 69. Calm wind.  Chance of precipitation is 50%.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 11am.  Partly sunny, with a high near 88. Calm wind.  Chance of precipitation is 30%.

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 68. Northeast wind around 5 mph becoming calm.

    Low: 68 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 90. Calm wind.

    High: 90 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Hot

Detailed Forecast

Today
Mostly sunny and hot, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
A slight chance of showers before 4am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 20%.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly cloudy through mid morning, then becoming sunny and hot, with a high near 90. Heat index values as high as 95. Calm wind becoming southwest around 5 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 50%.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 88. Calm wind. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 68. Northeast wind around 5 mph becoming calm.
Saturday
Mostly sunny and hot, with a high near 90. Calm wind.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
Mostly sunny and hot, with a high near 90.
Sunday Night
Partly cloudy, with a low around 71.
Monday
Mostly sunny and hot, with a high near 91.
Monday Night
Partly cloudy, with a low around 72.
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:
6 Miles SSW Knoxville TN
 35.89°N 83.98°W (Elev. 899 ft)
7:06 am EDT Aug 26, 2026
8am EDT Aug 26, 2026-6pm EDT Sep 1, 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