Maybe a short question and maybe better suited for the Wiki request topic, but these are pretty big tags with a very big overlap.
blue sky cloudy sky has nearly 3.000 results and I wanted to ask if that's correct usage.
Until now, I thought those tags shouldn't be used together and occasional clouds on a blue sk should just be tagged with blue sky + cloud: post #2850481, post #2849496, post #2847122 are all posts where cloudy sky makes few sense to me.
I'd expect to find post #2850443 or post #2848629 when looking for cloudy sky and not the three posts above where, like I said, blue sky + cloud would be sufficient.