From the National Weather Service:

Although there is the potential for a light dusting to a few 10ths of an inch of snowfall accumulation across northern portions of the Cumberland Plateau region Thursday night.

The best potential for accumulating snowfall across this region and across most of Middle Tennessee looks to be from Friday night through at least the morning hours on Saturday. Snow may even persist possibly into the afternoon and evening hours on Saturday across the Cumberland Plateau region as an upper-level low brings weak disturbances to the midstate.

Significant uncertainty still remains with actual timing of upper-level low and associated movement across the midstate. But as of this time there is at least the potential for accumulating snowfall amounts generally around one half of an inch across locations near the Tennessee-Alabama border to around one and one half inches across northern portions of the Highland Rim and locations approaching the Tennessee-Kentucky border. Amounts across northern portions of the Cumberland Plateau may range from two inches to locally higher amounts approaching three inches across the higher elevations of the Plateau.

This winter weather event could result in travel problems across the midstate Friday night and into Saturday and motorists are urged to use extra caution on area roadways especially secondary roads if this occurs.

Also a winter weather advisory may need to be issued for portions of Middle Tennessee during the Friday night through Saturday time period as this event approaches.