It's the annual December 5th start to the snow season! (See my bizarrely familiar LJ entry on the first Thursday of last December for more info.)
NWS text product
Philly school closing numbers
NBC10 (Philly) with info on this storm in particular.
Joe Bastardi (registration req'd, with free trial)
Wish I could still read Joe Bastardi and look at the models, but with only one free month of the service, I'd rather take it in the middle of the snow season, in January. So for now, I have no prediction, but a lot of what I'm reading has recently upped their predictions from about 2 inches to about 7 inches! Yay!!!