Now that's a proper,angry sky. A very (excuse the pun) atmospheric shot, Jo with fantastic colours. all that for just a few spots of rain. What a waste!
Interesting color..and definitely the color of a bad mood. There's a bit of grain in this, but perhaps you decided to leave it as it gives it "rough" appearance.
"I never looked for it, gave it no name; yet I knew it always, when the gift of peace came. I stood quite still for the moment that it lasted...Then the light shifted slightly and the moment passed, leaving me...with the lasting echo of its presence.." Diana Gabaldon