As shown in the time series to the right, mean Northern Hemisphere snow cover extent during March 2007 was below average, consistent with anomalously warm conditions across Asia, Europe, and the contiguous U.S. March 2007 snow cover extent for the Northern Hemisphere was the 9th lowest extent on record, and it has been below average in 15 of the past 20 years. Mean Northern Hemisphere March snow cover extent for the 1967-2007 period of record is 41.0 million square kilometers.

Snow cover for March 2007 across North America was below average, being the 13th lowest extent since records began in 1967. March's low snow cover extent can be attributed to the anomalous warm conditions experienced across the contiguous U.S. where monthly mean temperatures where more than 5°F (3°C) above average in many places. Mean North America March snow cover extent is 15.8 million square kilometers for the 1967-2007 period of record.

As depicted in the time series to the right, Eurasia's snow cover extent in March was below average and was the 11th lowest extent over the 41-year historical period. Much of this was due to the anomalously warm conditions that covered much of Europe and Asia during the past cold season. Average Eurasian March snow cover extent is 25.2 million square kilometers for the 1967-2007 period of record.