Severe Thunderstorms and Heavy Rain in the Mid-Atlantic; Heat Persists Across the South

Scattered severe thunderstorms and excessive rainfall are possible into the night in the Mid Atlantic, and heavy rain will shift to Virginia and the Carolinas on Friday. Severe thunderstorms are also possible in the Central Plains into the Upper MS Valley and the Deep South tonight. Dangerous heat persists across the Southern Plains and Lower MS Valley and heat will expand into the Southwest. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

75°F

24°C

Humidity 90%
Wind Speed NE 3 mph
Barometer 30.00 in (1014.7 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 21 Aug 1:53 am EDT
Extended Forecast for

6 Miles NNW Seymour TN

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 3am.  Mostly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers and thunderstorms before 10am, then a chance of showers and thunderstorms after 2pm.  Mostly cloudy, then gradually becoming sunny, with a high near 88. Heat index values as high as 96. Calm wind becoming west around 5 mph.  Chance of precipitation is 40%.

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight.  Partly cloudy, with a low around 69. Calm wind.  Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.

    High: 89 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67. West wind around 5 mph becoming calm  in the evening.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 87. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62. North wind around 5 mph becoming calm.

    Low: 62 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers.  Partly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 70. Calm wind.
Friday
A slight chance of showers and thunderstorms before 10am, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 88. Heat index values as high as 96. Calm wind becoming west around 5 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 69. Calm wind. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 67. West wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 87. Calm wind becoming northwest around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 62. North wind around 5 mph becoming calm.
Monday
Mostly sunny, with a high near 87.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62.
Tuesday
A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Tuesday Night
A slight chance of thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 10%.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Seymour TN
 35.95°N 83.83°W (Elev. 892 ft)
2:26 am EDT Aug 21, 2026
2am EDT Aug 21, 2026-6pm EDT Aug 27, 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