some of the Hi-Res CAMs keep daytime snow around here much lower and accumulations only reaching 5-7" in total. did some model sounding investigation and one main difference is much weaker omega in the CAMs. Verbatim the NAMs would give us a really good chance at thundersnow.
One negative factor is that after the initial 3 hour burst the DGZ gets really shallow due to strong WAA and it doesn't really recover until the very tail end.