Storm
If you think you've already seen this sky somewhere, I'll answer: quite possible. Some time ago, I was sitting over a piece of paper and started to mindlessly draw on it with coal. After a while, I came to the conclusion that it could be the sky during a storm.
From time to time, together with @piotrgrafik, we do joint works and we put them into our joint
@pkt account. When Piotr saw my storm sky, he came up with a 'lovely' story with two people burying something (rather a corpse) on the beach. The effect was great (in my opinion).
... so you could see the sky earlier.
The original card was lying a little bit in the drawer of my desk and today I finished my picture. Now I think that in this landscape, there are the same two people who hid the body on the beach... ...what a story...