0z Euro pulls the boundary through after the early week storm and the next system is able to hit a bit further east:
It may not happen that way, but that is at least a reasonable evolution of the pattern that could help eastern areas.
All other modeling has that system too far west for eastern areas, but the CMC does have a second wave ride the front of teh second system, so some hints taht it sees that evolution as possible.
EPS members see some possibilities there:
Again I like that window because it seems a reasonable way that this pattern could hit areas east of BNA. But I've also noticed (and others have mentioned that they've noticed it as well) that these ensemble members seem to follow the OP, at least if you are looking for an individual system. The dispersion is probably good for seeing the pattern's evolution out in time, but I'm not sure it is so great for a specific system.
Here's an interesting way to visualize that:
This is a gif of the 24 hr snowfall at Crossville as the 50 EPS members see it, for the past 7 runs. At first they saw a distinct window centered on the 17th, but over time, that window shifts to the 19th. This seems to follow how far the Euro has seen the boundary making it. I just can't decide if it is a legitimate window, or will the EPS push it back yet again?