Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

70°F

21°C

Humidity 90%
Wind Speed Calm
Barometer 30.00 in (1014.6 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 19 Aug 4:53 am EDT
Extended Forecast for

4 Miles NNW Walland TN

  • Today

    Today: Patchy fog before 7am.  Otherwise, sunny and hot, with a high near 90. Calm wind.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 5pm.  Mostly cloudy, then becoming sunny during the afternoon, with a high near 89. Heat index values as high as 97. Calm wind becoming south around 5 mph in the afternoon.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Increasing clouds, with a low around 70. Northwest wind around 5 mph becoming east in the evening.  Chance of precipitation is 50%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm.  Mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.  Chance of precipitation is 60%.

    High: 88 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am.  Partly cloudy, with a low around 69. Northwest wind around 5 mph becoming calm.  Chance of precipitation is 60%.

    Low: 69 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 7am. Otherwise, sunny and hot, with a high near 90. Calm wind.
Tonight
Partly cloudy, with a low around 71. Calm wind.
Thursday
A chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 5pm. Mostly cloudy, then becoming sunny during the afternoon, with a high near 89. Heat index values as high as 97. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. 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. Increasing clouds, with a low around 70. Northwest wind around 5 mph becoming east in the evening. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 69. Northwest wind around 5 mph becoming calm. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
Sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 66.
Monday
Mostly sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Walland TN
 35.77°N 83.85°W (Elev. 892 ft)
2:26 am EDT Aug 19, 2026
5am EDT Aug 19, 2026-6pm EDT Aug 25, 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