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

Areas of Thunderstorms and Heavy Rain Across the Country; Heat Wave Begins This Weekend

Widespread showers and thunderstorms, some severe, may bring heavy rain and flash flooding in the central Gulf Coast, Mid-Atlantic, the Upper Midwest, the Great Basin and Southwest. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend. Critical fire weather conditions are expected in the Northwest and Great Basin. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

84°F

29°C

Humidity 63%
Wind Speed S 5 mph
Barometer 30.08 in (1017.0 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 17 Jul 9:53 pm EDT
Extended Forecast for

3 Miles ESE Lenoir City TN

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, mainly between 4pm and 5pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 99. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    Showers then
    T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 74. West wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind around 5 mph. Chance of precipitation is 60%.

    High: 90 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 2am, then a slight chance of showers. Mostly cloudy, with a low around 74. Southwest wind around 5 mph. Chance of precipitation is 60%.

    Low: 74 °F

    T-storms
    Likely then
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, then showers and thunderstorms likely after 11am. Partly sunny and hot, with a high near 91. West wind around 5 mph. Chance of precipitation is 60%.

    High: 91 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 74. Calm wind. Chance of precipitation is 60%.

    Low: 74 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny and hot, with a high near 91. Chance of precipitation is 60%.

    High: 91 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Monday Night

    Monday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 73. Chance of precipitation is 60%.

    Low: 73 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75. Calm wind.
Friday
Showers and thunderstorms likely, mainly between 4pm and 5pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 99. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 74. West wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind around 5 mph. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely before 2am, then a slight chance of showers. Mostly cloudy, with a low around 74. Southwest wind around 5 mph. Chance of precipitation is 60%.
Sunday
A slight chance of showers, then showers and thunderstorms likely after 11am. Partly sunny and hot, with a high near 91. West wind around 5 mph. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 74. Calm wind. Chance of precipitation is 60%.
Monday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny and hot, with a high near 91. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 73. Chance of precipitation is 60%.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny and hot, with a high near 93.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 93.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Lenoir City TN
 35.78°N 84.24°W (Elev. 846 ft)
Last Update:
7:06 pm EDT Jul 17, 2025
Forecast Valid:
12am EDT Jul 18, 2025-6pm EDT Jul 24, 2025
 
Forecast Discussion
 
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Additional Resources

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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