Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast across parts of the Upper Midwest into the Great Lakes, the Northeast, and the central High Plains. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Knoxville Downtown Airport (KDKX)

Lat: 35.97°NLon: 83.87°WElev: 827ft.

Fair

82°F

28°C

Humidity 94%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 81°F (27°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 1 Jul 8:55 pm EDT
Extended Forecast for

3 Miles ESE Karns TN

Heat Advisory July 1, 09:18pm until July 3, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 1, 09:18pm until July 3, 09:00pm

    NOW until 9:00pm Fri

    Heat Advisory

  • Tonight

    Low: 74 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Patchy fog between 7am and 8am.  Otherwise, sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 97 °F

    Patchy Fog
    then Sunny

  • Thursday Night

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

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm.  Sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind becoming northeast around 5 mph.

    High: 97 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 2am.  Partly cloudy, with a low around 73. Southeast wind around 5 mph becoming calm.

    Low: 73 °F

    Chance
    T-storms then
    Chance
    Showers

  • Independence Day

    Independence Day: Sunny and hot, with a high near 95. Calm wind.

    High: 95 °F

    Hot

  • 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 40 percent chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 94.

    High: 94 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 74. Calm wind.
Thursday
Patchy fog between 7am and 8am. Otherwise, sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 74. Calm wind.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind becoming northeast around 5 mph.
Friday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. Southeast wind around 5 mph becoming calm.
Independence Day
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 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 94.
Sunday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73.
Monday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 73. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely. Mostly sunny and hot, with a high near 90. Chance of precipitation is 70%.
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 88. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Karns TN
 35.97°N 84.05°W (Elev. 1099 ft)
7:07 pm EDT Jul 1, 2026
9pm EDT Jul 1, 2026-6pm EDT Jul 8, 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