Meet Nature's Strange, Self-Rolling Snow Doughnuts

[Judi Lynn]

Meet Nature's Strange, Self-Rolling Snow Doughnuts
Here's how they form.

FIONA MACDONALD 10 MAR 2018
Found mostly in the open prairies of North America and some remote regions of Northern Europe, snow doughnuts or snow rollers might look like icy man-made structures, but these tyre-shaped curiosities are entirely natural.

They're very rarely seen because the number of weather conditions that need to be just right for them to form - including wind, temperature, snow, ice, and moisture - is pretty astonishing.

More:
https://www.sciencealert.com/meet-nature-s-strange-self-rolling-snow-doughnuts

[Eko]

1. Used to see them

in Idaho when I was a kid quite a bit.

[radical noodle]

2. We had snow rollers one time

when we lived in Indiana. Apparently, it was just freakish that the conditions were just right to do that where we lived (not a normal place for them).

[Rhiannon12866]

3. K&R. I've never even heard of these - I'm in the Northeast. Fascinating!

Thanks! I learn something new every day on DU!