Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

A Few Clouds

81°F

27°C

Humidity 74%
Wind Speed Calm
Barometer 30.18 in (1020.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 31 Aug 9:53 am EDT
Extended Forecast for

3 Miles ESE Karns TN

  • Today

    Today: Sunny and hot, with a high near 93. Heat index values as high as 98. Calm wind.

    High: 93 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 95. Heat index values as high as 101. Calm wind.

    High: 95 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 96. Calm wind.

    High: 96 °F

    Hot

  • Wednesday Night

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

    Low: 74 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 97. Calm wind.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm.  Sunny and hot, with a high near 95. Chance of precipitation is 40%.

    High: 95 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny and hot, with a high near 93. Heat index values as high as 98. Calm wind.
Tonight
Mostly clear, with a low around 72. Calm wind.
Tuesday
Sunny and hot, with a high near 95. Heat index values as high as 101. Calm wind.
Tuesday Night
Mostly clear, with a low around 72. Calm wind.
Wednesday
Sunny and hot, with a high near 96. Calm wind.
Wednesday Night
Partly cloudy, with a low around 74. Calm wind.
Thursday
Sunny and hot, with a high near 97. Calm wind.
Thursday Night
Mostly clear, with a low around 73.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Chance of precipitation is 40%.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 93.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Sunday
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:
3 Miles ESE Karns TN
 35.97°N 84.05°W (Elev. 1099 ft)
7:06 am EDT Aug 31, 2026
9am EDT Aug 31, 2026-6pm EDT Sep 6, 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