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

Dangerous Heat Wave Continues; Areas of Severe Thunderstorms Today

Dangerous, record-breaking heat will continue across most of the central and eastern U.S through Friday then focusing on the eastern U.S. through the Independence Day weekend. Peak heat indices of up to 115 degrees are possible. Strong to severe thunderstorms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians today. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

A Few Clouds

86°F

30°C

Humidity 67%
Wind Speed Vrbl 3 mph
Barometer 30.16 in (1019.8 mb)
Dewpoint 74°F (23°C)
Visibility 9.00 mi
Heat Index94°F (34°C)
Last update 2 Jul 9:53 am EDT
Extended Forecast for

4 Miles W Louisville TN

Heat Advisory July 2, 10:23am until July 3, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 2, 10:23am until July 3, 09:00pm

    NOW until 9:00pm Fri

    Heat Advisory

  • Today

    High: 95 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog between 7am and 8am. Otherwise, sunny and hot, with a high near 96. Heat index values as high as 105. Calm wind.

    High: 96 °F

    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Cloudy, then gradually becoming partly cloudy, with a low around 73. South wind around 5 mph becoming calm. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Independence Day

    Independence Day: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Calm wind.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 93. Calm wind.

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny and hot, with a high near 95. Heat index values as high as 104. Calm wind becoming northeast around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 74. Calm wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog between 7am and 8am. Otherwise, sunny and hot, with a high near 96. Heat index values as high as 105. Calm wind.
Friday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Cloudy, then gradually becoming partly cloudy, with a low around 73. South wind around 5 mph becoming calm. Chance of precipitation is 30%.
Independence Day
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Calm wind.
Saturday Night
A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74. Calm wind.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 93. Calm wind.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73.
Monday
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73.
Tuesday
Showers and thunderstorms likely. Mostly sunny and hot, with a high near 90. Chance of precipitation is 60%.
Tuesday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 72. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 89. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Louisville TN
 35.81°N 84.12°W (Elev. 892 ft)
Last Update:
7:06 am EDT Jul 2, 2026
Forecast Valid:
10am EDT Jul 2, 2026-6pm EDT Jul 8, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation