It seems more often than not there's something to track the last week of October. Some certainly delivered, 2011 Snow bomb, 2012 Sandy, Halloween storm of 1991 etc
11-12 featured a big PV like last year but was bone dry. Also had some big solar storms that fall that I wonder if they had an influence? Doubt we see anything that dry this year. Last year had the big PV but it was wetter, just zero cold air with the PV locked away.
The old adage will apply-earlier to start earlier to finish. Happens alot with these fast moving storms-this one is more like a frontal wave vs the storm some models had earlier in the week.
Models starting to shift east with the Friday night event. NAM has shifted the heaviest precip western edge from about Scranton to Newark and the GFS appears to be following suit.