We all know that predicted snow totals are very imprecise until about 12 hours before the snow starts. So the data from tonight’s model runs should be taken as preliminary.

Here are the current and latest NAM and GFS model QPF values for what is starting to look like a true snowfall for Saturday.  The GFS has over 0.40 inches water and the NAM has about  0.30 inches water falling as snow for PHL. That translates into 3-5 inches of snow, starting about daybreak and ending early evening .  Areas in NJ may have significantly more, areas west less.

The stastical models have declined in precipitation probability, but the latest isn’t available.

A developing situation. Stay tuned.