Thanks for your comment! You are right that Greenland Blocks (areas of high pressure near Greenland that help to "bunch up" the atmospheric flow in the eastern US and Europe) do have an impact on northeastern snowfall. However, at least for this year, we have not seen much in terms of a Greenland block. We would see that as a negative sign of the North Atlantic Oscillation (NAO). The NAO has been positive since late December.  

Instead, it is a block in the north Pacific which has helped set up the atmosphere downstream that ended up causing the series of snowstorms that helped Boston set its all-time snowiest winter record.