Winter '10 / '11 - December Snow Cover

From NCDC...

"The Northern Hemisphere snow cover extent during December 2010 was much above-average, marking the fourth largest December snow cover extent on record — behind December 2009, 1985, and 1970."

"During December 2010, the North American snow cover extent was above average, ranking as the seventh largest on record. This marks the fourth consecutive December with above-average snow cover extent for the continent."

Global Snow Report here.
National Snow and Ice Report here.