|NAM's high resolution variant for 5 PM. Yes, the blue indicates snowfall.|
This is a light precipitation and a low impact type of back edge of precipitation -- we should see showers and drizzle transition from liquid to frozen this afternoon across western areas and across higher elevations to our north, with that transition slowly marching east as the back edge of precipitation pushes northeast towards dinner. The transition to frozen should reach Philly towards dinner, with some flurries and light snow possibly flying around before precipitation winds down just after dinner.
Accumulations in the city are not likely, nor are they likely in most spots. Even the aggressive by historical standards NAM computer model is only hinting at coating type accumulations across the hills to our west and north. The Poconos and Blue Mountain would arguably stand the best chance of seeing that coating or coating plus accumulation towards evening, generally on yards and car tops.
That said, we could end up with a brief period of flakes flying in the city in bringing a more Christmas-like feel to Thanksgiving Eve. Consider this your "warning" -- but no need to run for salt, shovels, or bread on this one!