Looks bogus to me. A round ball of wind blown snow yes, but this??
In picture 1 note there are only 7 or 8 layers of snow on the roller, the inside is hollow like it was formed on a spindle. picture 2 it seems that it has rolled a very long way, it should be much larger in Dia with lots more layers . If it were "unrolled" it would never stretch out all the way to the beginning of the track. That's what I think. The track or tread looks too uniform on the ground and the outside of the roll.
As someone posted, from the land of crop circles!
Steve W
Disclaimer:Born and raised in the tropics, living in Louisiana no expert on snow!