Found this research study (The Elevation-Dependence of Snowfall in the Appalachian Ridge and Valley Region of Northeastern Pennsylvania) examining the impacts on elevation dependence snowfall and the types of conditions that influence events to either be low in snowfall range with elevation or high. Definitely found it to be an interesting read and I'm sure the mets (and @psuhoffman) would enjoy it too. Here is the link (http://nwafiles.nwas.org/jom/articles/2017/2017-JOM8/2017-JOM8.pdf), also if any met would like to chime in I remember a particularly elevation dependent snowfall in late November last year and wonder how those conditions line up with the studies findings.