If you are interested in gridded snow matrix data or other products such as
a specific geographic area's snow extent please use the online contact form
The Climate Data Record (CDR) of Northern Hemisphere (NH) Snow Cover Extent (SCE) is also available from the NOAA National Climatic Data Center (NCDC).
To access weekly data from the NCDC Climate Data Record Program:
Download the latest NH SCE using FTP [netCDF]
Use the NCDC THREDDS Data Server to access NH SCE