National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/catalog/cdr/snowcover/catalog.html

Dataset Size Last Modified
     Folder  Snow Cover Extent (Northern Hemisphere)   --
         nhsce_v01r01_19661004_20170703.nc 25.04 Mbytes 2017-07-17T21:55:25Z

NCEI-NC THREDDS Server at NCEI see Info
THREDDS Data Server [Version 4.6.8 - 2017-01-06T16:32:27-0700] Documentation