Mainly rain is falling across the area tonight. But along some of the ridges north and west of Chattanooga there is some freezing rain. Some ice is accumulating on elevated objects, such as trees and power lines, but amounts have been light so far. Be careful on bridges and overpasses! Warmer air will slowly move across the higher elevations tonight, which should melt any ice. Tuesday looks very wet. We could easily see 2.5" of rain or even more. This will saturate the ground. There is a flood watch for North Georgia for Tuesday. And with all the leaves on the ground roads could become slick, so be careful!.
After 10 PM Tuesday colder air will fly in. Winds will pick up, too. The cold air will mix in with the precipitation, and we will likely see snow showers develop. Amounts will vary with elevation. The heaviest amounts (up to an inch) will be in the Cumberland Plateau and the Smokies. In the valley areas I am expecting less than .5" on grassy surfaces and parked cars, roofs, etc. Some of the Smokies in extreme east Tennessee, Georgia and North Carolina could see up to 2 inches of snow. I am not expecting road problems in the valleys, but there could be some slick spots in the higher elevations Wednesday morning especially north of Chattanooga.
Cold dry air will move in for Thanksgiving day, with highs in the low 40's. Black Friday should be warmer and dry. On Sunday we will see a few more clouds with highs in the 50's. Next Monday more rain is likely.
Download the WRCB weather app for updated road conditions and the interactive radar. - Paul Barys