Last night’s 2 AM run of the models continued with the changed forecast I posted last night–The precipitation arrives in Philadelphia this afternoon (instead of this evening and Sunday).   Coastal storm development occurs later and further out to sea, so we don’t get any moisture thrown back on us on Sunday.

Upper air profiles support the formation of snow in PHL, but air temperatures near the surface and ground temperatures too warm for accumulation, except maybe on grassy surfaces.    So expect snowflakes this afternoon, but little if any accumulation.

It should be noted that both the NAM and GFS support this new forecast.   But the CMC (Canadian Model) still has a coastal storm forming close to us.   Thought I’d just mention this; I don’t usually put much stock in the CMC.

Sat 10AM Update: Latest NAM data show’s 0.29 inches QPF falling this afternoon and evening, tapering later this evening.  Upper air thermal profile supports snowflakes, but air surface temperatures expected to be above freezing and ground surface temperatures definitely above freezing.

We’ll see some wet snow this afternoon, but expect little or no accumulation on roadways.  The best type snowfall- nice to look at but little to no accumulation.  Maybe some grassy surface accumulation tonight.

The NAM has a few very light snow flurries Sunday.
1 PM Update:  Heaviest precip will be just south of PHL this afternoon.

5PM update: The precipitation is barely making it north of PHL airport this afternoon.