OHX has issued Flood Watches for all of Middle TN and a few Flood Advisories as well as Flood Warnings.
Flood Advisory counties: Bedford, Lawrence, Davidson, and Williamson
Flood Warnings: Maury, Perry, Hickman, Humphreys, and Bedford
1-5+" of more rain is expected tonight and tomorrow across all of Middle TN. The areas that will have the most likely chance at seeing the highest totals are the ones that have already received a good amount already (Centerville, Columbia, Shelbyville, Linden, etc.). I think some areas will receive over a foot of rain after this is all said and done.