A volcanic eruption is not necessary for a great winter. However, one certainly helps. Just look at 92-93, 93-94, and 95-96, following Pinatubo. In fact, they are still 3 of the Top 4 snowiest winters in State College, PA:
1 1993-1994 109.3 0
2 1995-1996 99.0 0
3 1977-1978 98.2 0 4 1992-1993 92.5 0
However, we have had great stretches of winters (2002-03 to 2004-05, 2008-09 to 2010-11, and 2013-14 and 2014-15) even without a volcanic eruption. If we can have another great winter in 2026-27, we could add another great stretch of winters.