I was a junior in high school growing up in Delco. I clearly remember the storm but don't recall many details like I do with the '93 and '96 storms. Maybe the memory is starting to fade after nearly 40 years.
Thanks for mentioning the thunder snow. Now that you said it, I recall it and I think it was the first time I ever experienced it too.
I remember Herb Clark (and Super Radar) calling for 20" or more, I couldn't believe it was possible to get that much snow.
I think we were out of school for an entire week.
Overall, that was a pretty lame winter in Delco. I do recall they were predicting a big snow storm on a Saturday (don't know the date), but woke to a driving rainstorm instead. We may have gotten a sloppy inch or so at the end.