-PNA/-NAO can be a high stakes pattern....you can get strong gradients. We talk about great stretches like December 1970, but you go south a bit and there was almost nothing...but on the north side of the mean boundary, it was prolific snows. The NAO migrating west makes me think that over time, the gradients will be pressing south...it starts out kind of north, and then sinks. Going deeper into climo winter will also help as well.