A Perfect Storm: What Caused "Snowmageddon"?
You've heard or at least read about the pledge of the United States Postal Service: "Neither rain, nor snow, nor sleet, nor hail shall keep the postmen from their appointed rounds." Well, that was before government workers had a union because today they quickly note that unshoveled snow, icy sidewalks, or snow plowed up against mailboxes are all exempt from that credo. But in February of 2010 they had a good excuse for suspending service. The National Weather Service reported that three storms spanning from December to February in the winter of 2009-10 had dumped a whopping 54.9 inches...
Source: science20.com