For us amateurs, I think posting what the 'perfect' scenario is against the current setup really helps illustrate what it takes from here. I'm looking for Jan 4 2018 as a possible analog
Out west looks similar - but the trough is positive tilt this time out - I posted approx the same time frames on the current 06z GFS 500 and the verified '96 500 vort.
I just did some google AI. Average us home’s roof can hold 20lb per square foot load. At a10 to 1 ratio, thats 38.5 inches of snow. So actually your point is valid if we get 2 more feet, assuming all of it is 10 -1 ratio.
It doesn’t get heavier when it melts. The weight will be the same. The fluff we just got has a relatively low water content. 3 feet of concrete snow is a different story, but you’ll likely still be fine anyway. If this storm blows 70 it won’t pile up on the roof as much but you will have plenty of other problems besides your roof.
Let's just stomp this idea out right now. This is not going to cut. The closest we would get is a coastal runner, and that's going to be a dry(er) solution for most - and is not likely with a 530 DAM isobar over Kentucky. No.