The NAM and GFS continue to predict different scenarios for the coastal storm tomorrow, Wednesday.

The NAM predicts amost twice as much precipitation with more falling as snow.  The GFS has warmer temperatures at the surface and delays changeover to snow until late in the afternoon, as the amount of precipitation (QPF)  winds down.

The NAM has often overstated QPF in past storms.  So I’m going with the GFS model, which has a changeover to snow between 2-4 PM and conditions allowing accumulation after 4 PM.  Still going with 1-2 inches of snow for Philadelphia and the immediate suburbs.   Further NW, greater amounts possible.

The new models come out about 10:30 PM.   I’ll update if things look different.