If you look at the HRRR and the western edge in Western PA, between hours 2 and 4 it basically stops moving while heavier returns over the eastern half of the state go from being East to West Alligned to more South to North. My unprofessional opinion is that is due to the energy transitioning to a low at the coast and the shield becoming more circular as a result. If all goes close to this, people in the LSV, especially the further South and East you go, have a lot of heavy snow ahead of them. 3-4 hours 1-2"/hr snows.