Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

73°F

23°C

Humidity 90%
Wind Speed W 8 mph
Barometer 30.01 in (1014.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 17 Aug 11:53 pm EDT
Extended Forecast for

3 Miles WSW Louisville TN

  • Overnight

    Overnight: Mostly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 88. Calm wind becoming northwest around 5 mph.

    High: 88 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. North wind around 5 mph becoming calm.

    Low: 67 °F

    Mostly Clear

  • Wednesday

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

    High: 91 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 11am.  Partly sunny and hot, with a high near 90. Calm wind becoming west around 5 mph in the afternoon.  Chance of precipitation is 30%.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 70. Northwest wind around 5 mph becoming calm.  Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 8am.  Partly sunny, with a high near 88. Chance of precipitation is 50%.

    High: 88 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers.  Partly cloudy, with a low around 68. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 72. Calm wind.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 88. Calm wind becoming northwest around 5 mph.
Tuesday Night
Mostly clear, with a low around 67. North wind around 5 mph becoming calm.
Wednesday
Sunny and hot, with a high near 91. Calm wind.
Wednesday Night
Mostly clear, with a low around 71. Calm wind.
Thursday
A chance of showers, with thunderstorms also possible after 11am. Partly sunny and hot, with a high near 90. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Northwest wind around 5 mph becoming calm. Chance of precipitation is 30%.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 8am. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Saturday
A slight chance of showers, with thunderstorms also possible after 8am. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 67.
Sunday
Sunny, with a high near 87.
Sunday Night
Mostly clear, with a low around 64.
Monday
Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Louisville TN
 35.81°N 84.1°W (Elev. 974 ft)
8:11 pm EDT Aug 17, 2026
12am EDT Aug 18, 2026-6pm EDT Aug 24, 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