Here is the 12z EURO snowfall map with actual deformation zone encircled....this is where some 18-20" amounts may verify based on this run given H7 track.
Probably wouldn't be as much subby east of it, as there normally may be due to 850 inflow, but I would not want to be west of it, looking in from the CTRV....subsidence+deformation may equal some single digits.