It's not just prairie scenes. It's also scenes when clouds are the subject.
Seriously, I used to be in touch with a landscape photographer on another forum that I no longer frequent. Her work is regularly published and is owned by small museums. She spent a week camping in the wilderness at the same site because she had planned a particular composition. It was only on the last day of her trip that the clouds appeared. It wasn't until then that she got her shot because the image would not have been up to her standard without the clouds.