Ahhh. THAT snow storm. I remember it very well. It happened over my birthday in 1958. The snow was driving like a cold wet sand storm. The finest "snow" particales imaginable. Have not experienced one like that since.
The story in the Philadelphia Evening Bulletin was that due to a occasional shortage of the GG-1 filter material , there was a service tech at the PRR facility who wanted to guarantee he always had filter material for his service assignments, so he stock piled large quantities hidden away to guarantee replacement filter material.
Well, turns out that there were GG-i's stopped dead in their tracks with clogged filters all over the system and guess who was not able to make it in to work that day in the deep snow? I also seem to remember there were shorted out motors too????
However in the 1991 summer issue of the PRR High Line rag the retired railroad transportation superintendent only mentioned weather related electrical problems and turnout issues. Company position?