That phenomenon was helped by NYC reporting oddly low snowfall for the 1958 storm, 5.9" on 2/16 and 7.9" total, with temps/LE making significant p-type issues a low probability. EWR had 13.3", PHL 13.0", BDL 11.6", inland NJ 16-21", BOS 19.4". (Trivia: That was my 2nd of 7 storms 18-24" 3/56 thru 2/61. Never since experienced such a flock of huge storms, though we had 5 events 15.5-21.0" from 12/16 thru 3/18, 6 if the start point is 1/15.)