As mentioned, the snow is moving in earlier than shown by yesterday’s models and it should be snowing in most areas as early as 6-7 PM.  The snow will ramp up quickly.

The 1 PM (18z) runs of the NAM and GFS are available.   The NAM continues with a QPF of slightly over 2 inches water equivalent.  The GFS, as always, is somewhat less at 1.81 inches water equivalent.  This is all for PHL airport gridpoint.

So, we’re still on track with 20-30 inches of snow with the higher end of the range more likely.

Of interest is the wind prediction,  with the GFS and NAM showing sustained winds of 30-40 mph, the highest expected about daybreak Saturday.

I’ll update later.   The next NAM FOUS data is usually online about 9:40 PM and some of the early GFS  data hopefully available by 10:45 PM.