Not sure if one of the theadex type sites can do it....Chris has a link to a good one that isn't just the extremes. I don't have the averages for BDL for 12"+ storms.
For ORH, since 1950, there have been 80 events of 12"+....but obviously some winters go without one. So in those 69 winters, 44 of them had at least one 12"+ event. That means 25 of them did not. So if you go by the binary "yes" or "no"....then the probability of getting at least one event would be 64%. BDL is a significantly worse spot for big storms than ORH, so my guess is the odds would be somewhere around half of ORH's. Maybe a bit more....like 35-40%.
I know this information is available somewhere in the climate normals in the NCDC (now NCEI) probability sections, but I cannot navigate that disaster of a site anymore. Not user-friendly at all for finding those values.