The National Climatic Data Center (NCDC) released their analysis of the winter of 2013-2014 last week. NCDC ranked the period from December 1 through February 28 as the 25th coldest on record for North Dakota. You may recall locally it was the 16th coldest on record, but western North Dakota was not as cold making the average for the entire state lower in the cold rankings.
Minnesota on the other hand recorded a more evenly spread cold winter throughout that state. Taken as a whole, NCDC ranked this past winter as the 6th coldest on record in Minnesota. The past 119 winters are used in these rankings. Nationally, NCDC ranked the past winter as the 34th coldest on record.
Using other datasets and analysis puts that ranking closer to the Top 10, but no matter what the ranking; most Americans east of the Rocky Mountains experienced a winter that will not soon be forgotten.