850's are very warm throughout. Dews and surface temps are supportive for frozen.
I think the reality is this is a pelt fest in most areas in subforum, where the qpf is > 0.1".
The dynamic forcing is in the base of the H5 trough, which cuts off over the southern Mid Atlantic. It's an interesting look--snow-wise-- for that crew.
Best to not get roped in up here, unless sleet is your thing.