This has the potential to a historic storm for the northeast. Something we'll talk about decades from now (I hope I'll be around decades from now). A very large subtropical storm with hurricane-force wind striking south of Long Island/NHC nearly head-on into the coast would be an extremely rare event. This could set the record for the number of people without power from a single storm. Flooding will be like nothing many have seen in their lifetimes. Very, very bad...
wx, as long as I have seen you here, I've never heard you so concerned. My question to you and other mets, is if there is a possibility of freezing weather impacting the region after the storm passes, which would be doubly devastating. Once the power is out with a wind swath like this, we could see folks without heat for upwards of a month and right into the start of winter.
Any snow that falls will be well inland over the interior Appalachian areas of Pennsylvania and western VA. This would not be unusual for them. They can get snow and freezing weather in late September so it wouldn't be historic. And the overall jet flow after this moves out is forecast to be zonal so there should be a return to normal or above normal temps for any areas that get snow.
Having said that I would agree with wxman57 that this is surely looking like a really bad, and yes historic storm for the mid-Atlantic to northeast. It's the amount of coastal water damage, flooding damage and widespread wind damage that will be historic if the model forecasts are right.