Mysterious cloud appears on Denver radar

First came the mystery:

Then came the explanation:

Or see video in the comments below.

9 thoughts on “Mysterious cloud appears on Denver radar

    1. Oh I think so too! I was a little disappointed that they weren’t monarchs, since we’re losing our monarch population, but it was amazing to see. I’ve no flowers to attract them to my yard, but saw them all over other patches of blossoms. It was like the flowers had come alive.

... and that's my two cents