Like someone said, we were due for a well below average snow year. The last season that failed to reach two feet of snow was the 1994-1995 season with 23.4". Looks like that's where we're heading, and the last season to not reach 20" was 1990-1991, with just 17.2", so that's also a possibility too. Also, looking back at historical records, missing 20" or 24" in a season was much more common the further back in time I looked.
The past decade of winters had snow that averaged almost 10" above average, so I guess we shouldn't be surprised at a lower than average year. But it's definitely frustrating when 3 out of the last 4 years have been bad, and soon to be 4 of 5 years.