As shown in the time series to the right, mean Northern Hemisphere snow cover extent during winter 2006/2007 was below average. Much of this was due to anomalously warm conditions across Asia, Europe, Canada, and the northeast half of the U.S. Winter 2006/2007 snow cover extent over the Northern Hemisphere was the 8th lowest extent in the historical record. Mean Northern Hemisphere winter snow cover extent for the 1967-2007 period of record is 45.4 million square kilometers.

Snow cover for winter 2006/2007 across North America was above average, and was the 13th largest extent over the 41-year historical record. This was in part due to a series of snow and ice storms that struck the U.S. during the month of February. Average North America winter snow cover extent is 17.0 million square kilometers for the 1967-2007 period of record.