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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Current conditions at

Knoxville Downtown Airport (KDKX)

Lat: 35.97°NLon: 83.87°WElev: 827ft.

Fair

86°F

30°C

Humidity 59%
Wind Speed SW 15 G 21 mph
Barometer 29.81 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 17 Jun 5:55 pm EDT
Extended Forecast for

Knoxville TN

  • Tonight

    Tonight: Increasing clouds, with a low around 74. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 74 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 4pm. Increasing clouds, with a high near 87. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Chance
    Showers and
    Breezy then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 69. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Chance
    T-storms then
    Showers
    Likely

  • Juneteenth

    Juneteenth: Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm. Partly sunny, with a high near 85. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63. North wind around 5 mph becoming calm.

    Low: 63 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 86. Calm wind.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 88.

    High: 88 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.

    Low: 70 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Tonight
Increasing clouds, with a low around 74. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Thursday
Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 4pm. Increasing clouds, with a high near 87. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 69. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Juneteenth
Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm. Partly sunny, with a high near 85. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 63. North wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 86. Calm wind.
Saturday Night
Partly cloudy, with a low around 66. Calm wind.
Sunday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 88.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.
Monday
Showers and possibly a thunderstorm. High near 84. Breezy. Chance of precipitation is 90%.
Monday Night
Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 80%.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Knoxville TN
 35.96°N 83.94°W (Elev. 899 ft)
Last Update:
2:26 pm EDT Jun 17, 2026
Forecast Valid:
6pm EDT Jun 17, 2026-6pm EDT Jun 24, 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