I just checked xmacis2. The Quakertown coop reported 80/43 on March 28 and 43/21 on the 29th. Belvidere, NJ reported 84/38 on the 28th and 44/22 on the 29th. Definitely an interesting temperature drop.
I think 2010 was our last truly cold December. 2017 had a frigid ending but I don't think it qualifies overall. I wonder if it would take a predominantly -NAO and -EPO pattern to get it done.
I'm not sure about 30 year averages, but according to xmacis2, NYC averaged about 32" in the 50 year period between 1870 and 1920. I think the difference is that much of that was made up of 4-8," 6-10" types of events with KUs being less common. Obviously it was also much colder then.
Many of our very good winters consist of one good storm and a great three weeks of winter. Any winter with one great month (February) and one decent month (December) should at least warrant a "very good" rating in my book. Otherwise the same could be said about winters like 04-05 and 09-10.
Stroudsburg, PA, not far from where I live, evidently recorded 35.4" total and 6.8" in one hour from the March 20, 1958 storm. Much of that also occurred in the middle of the day with temperatures around freezing.
I was only 7 and not following the weather at the time, but it must have been a tremendous heartbreak here in NW NJ. Only like 4-5" total after HECS totals forecasted .
February 2014 needs recognition as well. Consistently cold (though not to the extent of 2015), along with consistently deep snowpack with back to back storms on February 3 and 5 in addition to a great two parter right before Valentine’s Day. Probably one of the more underrated recent winters in general.