The area that is circled in orange is the new area the storms prediction center is watching carefully for a watch. Instability levels of around 750 j/kg are moving into the area ahead of the line of storms that is developing in AL. They will continue to strengthen as they move east at around 30mph and move into a strongly sheared environment. This means that I think that the watch that will come out might be a tornado watch. Metro Atlanta as of right now will not be in the watch. 

The SPC is monitoring an area covering N ALabama, S Tennennessee and a lot of N Georgia. If there is a watch issued it will most likely be a tornado watch and it will most likely be issued by 6pm tonight.

The Setup

There is a distinct boundary that is moving across the Al TN border right now in the form of a warm front. Instability in AL is increasing and with the SW flow at the surface it is being transported into that area. At the same time there is a pretty stong impulse of energy seen on the water vapor imagery that is moving in from AR. These three things (the warm ftonr, the instability, and the upper wave) will start coming together around 7pm later tonight. Storms are expected to fire along the warm front and intensify rapidly as they head east at around 30mph. Some of these storms will move into N Georgia later tonight and could produce winds and hail, can't rule out a tornado even though they are not likely. We will continue to monitor.