This is for one of the blog readers!
Here is a skew-T- Diagram for JFK airport Friday morning.
This is based off of the 18z run of the GFS and shows all snow falling. The air according to the models over JFK during most of the storm is marginal so you might luck out with lower snow accumulations over that area. If the storm shifts slightly (I'm talking 20 miles) then you have 10 inches of snow at JFK. I'll update tomorrow with the new model runs, check back in! I hoped this helped!