While the northern Cumberland Plateau is the most likely area to see snowfall accumulations around an inch this afternoon, places west of there to the I-65 corridor could see trace to half inch amounts with bands of snow that are expected to develop this afternoon.
Roads may become slick this evening as any snow that accumulates is unlikely to melt due to below freezing temperatures. Expect lows to dip into the teens across the state starting this evening into the overnight hours. Westerly winds around 5 to 10 mph will allow wind chill values to drop into the 0 to 5 degree range for many places across Middle Tennessee.
With highs expected to stay below freezing Christmas day and an increase in winds during the day, it is possible that the Cumberland Plateau sees single digit wind chills last from early tomorrow morning through Saturday morning.
Prolonged exposure to these temperatures without proper clothing will be dangerous. These temperatures will also be hazardous to outdoor animals who are left without proper shelter.
Take precautionary measures now. Make sure exposed water pipes are covered and bring inside small pets. For larger animals, make sure they have proper shelter with some type of heat source.