Anybody who grew up a schoolboy in Knoxville knows that you can't look at Nashville to see what kind of weather Knoxville is going to get. You look at the weather because you're hoping to get out of school, you get excited because Nashville gets crushed with snow....and then it almost always dies on the plateau. This storm may be strong enough to actually make it over to Knoxville, but Knoxville never gets as much snow as Nashville got.
The way to see whether it's going to snow in Knoxville is to look at Birmingham and Chattanooga. If it comes up that way, you're golden. (If you want snow.)