Whilst Siberian snow cover is lacking so far compared to previous years (especially 2017 for instance), Scandinavian snow cover continues to increase dramatically. In fact in the archive, I could not find as much snow cover over Scandinavia back to 1998 as 2018 on 5 October. Closest matches being 2003 and 2009. Notice 2003 and 2009 didn't have large extents of snow cover over Siberia either (especially 2009) on 5th October.
Here is a chart to illustrate what I'm saying