There is a persistent and highly unusual cloud formation associated with the range.

What are the conditions where increasing evaporation will lead to more cloud formation?

"One insisted that the horse was a cloud formation over Wyoming."

There were good cloud formations, pink above green and yellow.

These two factors play a key role in air circulation and cloud formation.

Just how big was that particular cloud formation, how far away.

The fog had lifted, the low cloud formations moved on elsewhere.

Unusual cloud formations have been noticed here since ancient times.

"It should be bright and clear, so you can see cloud formations."

Its orange surface was crossed by a black cloud formation.