Members of The Cloud Appreciation Society are trying to persuade people to add a new type of cloud to the books.
They want to add the name asperatus to the terms we already use - cirrus, stratus and cumulus.
The society thinks that violent looking waves of cloud like these ones aren't covered by existing names, and need a new one of their own.
The current terms used to describe clouds were first thought up back in 1802 by an amateur weather expert called Luke Howard.
Now clouds get their scientific names from how high they sit in the sky as well as what they look like.
The society also thinks people should take more time each day to look above them - and think our lives would be much more dull without them.