I don't know if these pictures will convey the weirdness of this sky, the afternoon sky looked like this to our north while the rest of the sky was clear. We really began to worry that it was a forest fire. These pictures are from my cell phone, so the quality isn't that great, but here goes.
As soon as we pulled into the driveway it started it started to snow really hard and fast, so it was a snow cloud, of course. A rogue snow cloud.