If you are interested in plain text snow extent matrices (legacy file format) or other products, such as snow extent areas for a specific geographic area please use the online contact form.
The following archive contains 1° by 1° gridded North American snowfall described by Kluver et al., 2016. Daily files span from 1900–2009:
Download NorAm Gridded Daily Snowfall v4 [tar, 2.3 GB]
The Climate Data Record (CDR) of Northern Hemisphere (NH) Snow Cover Extent (SCE) is freely available in netCDF format from the NOAA National Centers for Environmental Information (NCEI).
Current version is v01r01. To access weekly data from the NCEI Climate Data Record Program:
How to cite this dataset when used as a source:
Robinson, David A., Estilow, Thomas W., and NOAA CDR Program (2012): NOAA Climate Data Record (CDR) of Northern Hemisphere (NH) Snow Cover Extent (SCE), Version 1. [indicate subset used]. NOAA National Centers for Environmental Information. doi: 10.7289/V5N014G9 [access date].
Estilow, T.W., A.H. Young and D.A. Robinson (2015) A long-term Northern Hemisphere snow cover extent data record for climate studies and monitoring. Earth System Science Data, 7, 137-142, doi:10.5194/essd-7-137-2015.
Robinson, D.A. and A. Frei (2000) Seasonal variability of northern hemisphere snow extent using visible satellite data. Professional Geographer, 51, 307-314, doi:10.1111/0033-0124.00226.
Robinson, D.A., K. F. Dewey and R. Heim, Jr. (1993) Global snow cover monitoring: an update. Bulletin of the American Meteorological Society, 74, 1689-1696.