MODIS snow and ice datasets are archived at the NSIDC DAAC that provides search and order tools, and users services and support. http://nsidc.org/data/modis
MODIS snow and sea ice data products can be searched and ordered using Reverb | ECHO at: http://reverb.echo.nasa.gov/reverb/#utf8=%E2%9C%93&spatial_map=satellite&spatial_type=rectangle
NSIDC is the DAAC for the NASA VIIRS snow cover and sea ice data products. Release date for the NASA VIIRS snow cover data products is anticipated to be sometime in late 2016.
Photograph by D. K. Hall Mt. Wrangell, Alaska, July 1987.