Not to be a killjoy for those in the main axis across portions of IL/IN/OH/MI, but I wouldn't put too much stock in this snow maps showing a wide axis of 6-12" amounts.
Most foreign guidance is a drier/less snowy than American guidance. We've seen that battle many times in the past, and know how it often plays out. Would lean towards a solid corridor of 2-5" to 4-7" in the main axis, locally higher.