Last night when we were looking at the forecast for Florence, I note that the NAM had the Tennessee Valley going from nothing to a whole lot in a very short amount of time. The NAM was right.
This line of thunderstorms is going to continue through the early morning, with Memphis in immediate danger and Huntsville the next two cities in danger. There is some development back in Arkansas, but it looks like Little Rock will be spared the bow echoes bearing down its neighbors to the east.
The great news is, this system will clear up quickly, but for the time being, bow echoes cover a lot of territory, and trees may come down and power may be lost. Stay awake if you are in the area until the initial line has gone through.