The Storm Prediction center has issued a Mesoscale Discussion regarding increasing instability over portions of the Tennessee Valley and surrounding areas. A severe thunderstorm watch may be issued for these areas later in the afternoon.
The full text of the discussion can be found here, but the summary is that instability is increasing as temperatures heat up. Thunderstorms with strong winds and hail will be possible this afternoon through the early evening.
A severe thunderstorm warning is already in effect for Marion County, TN until 2:00 PM. This storm is moving SE at 5mph.
More updates on our weather blog, Valleywx.com.