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

Severe Thunderstorms and Heavy Rainfall Today from the Central Plains into the Tennessee Valley

Severe thunderstorms capable of damaging winds will be possible from the Ozark Plateau east into portions of the Southeast today. Rounds of heavy thunderstorms ahead of a slow moving front will continue locally heavy rainfall and scattered flash flooding potential from the Ozarks to the Ohio and Tennessee Valleys today. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

73°F

23°C

Humidity 84%
Wind Speed NE 6 mph
Barometer 30.07 in (1016.8 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 12 Jul 2:53 am EDT
Extended Forecast for

Knoxville TN

Flood Watch July 12, 03:37am until July 13, 02:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch July 12, 03:37am until July 13, 02:00am

    NOW until 2:00am Mon

    Flood Watch

  • Overnight

    Low: 70 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then showers and thunderstorms likely after 2pm. Mostly cloudy, with a high near 82. South wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Showers
    Likely then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 3am, then a chance of showers and thunderstorms between 3am and 5am, then a chance of showers after 5am. Low around 68. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. High near 82. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 80%.

    High: 82 °F

    Chance
    T-storms then
    T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 8pm. Mostly cloudy, with a low around 68. Northeast wind around 5 mph. Chance of precipitation is 60%.

    Low: 68 °F

    T-storms
    Likely then
    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Northeast wind around 5 mph.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then showers and thunderstorms likely after 2pm. Mostly cloudy, with a high near 82. South wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 3am, then a chance of showers and thunderstorms between 3am and 5am, then a chance of showers after 5am. Low around 68. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. High near 82. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 80%.
Monday Night
Showers and thunderstorms likely before 8pm. Mostly cloudy, with a low around 68. Northeast wind around 5 mph. Chance of precipitation is 60%.
Tuesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Northeast wind around 5 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88.
Wednesday Night
A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Knoxville TN
 35.98°N 83.94°W (Elev. 942 ft)
Last Update:
2:26 am EDT Jul 12, 2026
Forecast Valid:
3am EDT Jul 12, 2026-6pm EDT Jul 18, 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