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

Athens McMinn County Airport (KMMI)

Lat: 35.4°NLon: 84.56°WElev: 874ft.

A Few Clouds

66°F

19°C

Humidity 100%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Last update 19 Aug 5:15 am EDT
Extended Forecast for

4 Miles NNE Watts Bar Dam TN

  • Today

    Today: Patchy fog before 9am.  Otherwise, sunny and hot, with a high near 93. Heat index values as high as 98. Calm wind.

    High: 93 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms after 5am.  Partly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely before noon, then a slight chance of showers and thunderstorms after 5pm.  Partly sunny and hot, with a high near 90. Heat index values as high as 100. Calm wind becoming east around 5 mph in the afternoon.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 70. Calm wind.  Chance of precipitation is 40%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 11am.  Mostly sunny, with a high near 89. Calm wind.  Chance of precipitation is 50%.

    High: 89 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of thunderstorms before 8pm.  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 and hot, with a high near 91. Calm wind.

    High: 91 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Hot

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, sunny and hot, with a high near 93. Heat index values as high as 98. Calm wind.
Tonight
A 10 percent chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 72. Calm wind.
Thursday
Showers and thunderstorms likely before noon, then a slight chance of showers and thunderstorms after 5pm. Partly sunny and hot, with a high near 90. Heat index values as high as 100. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 70%. 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. Partly cloudy, with a low around 70. Calm wind. Chance of precipitation is 40%.
Friday
A chance of showers, with thunderstorms also possible after 11am. Mostly sunny, with a high near 89. Calm wind. Chance of precipitation is 50%.
Friday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 69. Calm wind. Chance of precipitation is 30%.
Saturday
Mostly sunny and hot, with a high near 91. Calm wind.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Mostly sunny and hot, with a high near 90.
Sunday Night
Partly cloudy, with a low around 66.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 89.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 67.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Watts Bar Dam TN
 35.65°N 84.78°W (Elev. 741 ft)
2:26 am EDT Aug 19, 2026
5am EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
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Additional Resources

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