An Alberta clipper system will bring a chance of light snow late Tuesday afternoon .

As always, there are differences between the NAM and GFS models with the NAM showing about .15 inches of water and the GFS showing about .03 inches of water(QPF).   Both models have the upper atmosphere cold enough for snow but both models also show surface temperatures to be above freezing.

With the QPF values in this  low range, it is not out of the question for the precipitation to miss us or only affect northern areas. Either way little or no accumulation is expected due to temperatures being too warm.

The afternoon NAM has backed off on the QPF.  It’s down to .01 inches. So maybe a flurry in Philadelphia, maybe not.

It is expected for temperatures to drop behind the clipper so any moisture lingering may freeze later Tuesday evening.   I’ll update later tonight.

Tonight’s NAM QPF is again 0.01 inches water, the GFS has 0.04 suggesting a snow flurry or quick snow shower at most.