Here's what I've gather so far...
As mentioned, it looks like Sandy will be a tropical storm by the time it reaches mid-PA (approx. 50 mph). Looks like it will have this "Nor'easter" effect because the winds, going counterclockwise, will pick up colder air from the northeast and pull it down on the west side of the storm (PA) making it a cold and wet "tropical" storm.
Looks like PA also at the same time gets hit with this other northwest cold front storm. Not sure of the exact effects of this convergence but it seems like it would be more cold and snow than flooding. Not sure what the wind effect would be.
BTW, here's a link to a pretty good real-time view of the hurricane and its projected path.
http://www.weather.com/weather/hurricanecentral/tracker/2012/chris
Praying for you.