Mar 2018 is a good recent ex of how -PNA doesn't automatically mean a pattern is unfavorable pattern for snow/cold in the SE US esp when it's coupled to -NAO

Fwiw, we saw 3 accumulating snows at GSO in Mar 2018. Imagine what a similar pattern is capable of w/ better climo#ncwx pic.twitter.com/PmyQchgQlp

— Eric Webb (@webberweather) January 12, 2021