Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Chattanooga, Lovell Field (KCHA)

Lat: 35.03°NLon: 85.2°WElev: 679ft.

Mostly Cloudy

82°F

28°C

Humidity 67%
Wind Speed Calm
Barometer 30.01 in (1015.2 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 19 Aug 11:53 pm EDT
Extended Forecast for

Harrison TN

  • Overnight

    Overnight: Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly before 9am.  Mostly sunny and hot, with a high near 93. Heat index values as high as 101. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 93 °F

    Chance
    T-storms then
    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 3am, then a chance of showers and thunderstorms after 5am.  Increasing clouds, with a low around 74. Calm wind.  Chance of precipitation is 40%.

    Low: 74 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms before 8am, then showers likely between 8am and 11am, then showers likely and possibly a thunderstorm after 11am.  Mostly cloudy through mid morning, then becoming sunny and hot, with a high near 91. Heat index values as high as 98. Calm wind becoming west around 5 mph in the afternoon.  Chance of precipitation is 60%.

    High: 91 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of thunderstorms before 8pm.  Partly cloudy, with a low around 72. Calm wind.  Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 92. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 92 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71. Northwest wind around 5 mph becoming calm.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 91.

    High: 91 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 74. Calm wind.
Thursday
A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly sunny and hot, with a high near 93. Heat index values as high as 101. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms before 3am, then a chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 74. Calm wind. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms before 8am, then showers likely between 8am and 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy through mid morning, then becoming sunny and hot, with a high near 91. Heat index values as high as 98. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.
Saturday
Sunny and hot, with a high near 92. Calm wind becoming northwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 71. Northwest wind around 5 mph becoming calm.
Sunday
Sunny and hot, with a high near 91.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Mostly sunny and hot, with a high near 90.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 92.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
Harrison TN
 35.11°N 85.13°W (Elev. 797 ft)
7:06 pm EDT Aug 19, 2026
12am EDT Aug 20, 2026-6pm EDT Aug 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database