Large-scale pattern recognition techniques would indicate that this would not be a heavy snow event.
However, a closer look (div Q / isentropic analysis ect) indicated some significant large-scale lift.
Frontal scale lift was also forecast, which would focus the large-scale lift.
Instability would also be present, which would further intensify and focus the lift.
Important : all of these favorable factors would only be in place for a short time (around 00z on the 28th).