There is something dramatic about rain clouds passing through.
But what really caught my eye here was the contrast – the contrast between the dark vineyard and the blue sky with the soft white clouds, and the contrast between that part of the sky and the dark, heavy, rain-laden cloud above it.
We need contrasts……bright, fine light and deep darkness too.
The rhythm of light and darkness experienced by us all grounds our very existence not in constancy and sameness, but in perpetual change and difference.
Vive la difference!
Heroes Not Zombies 
Nice thoughts. I love the photo.