This is a good capture of some interesting weather, and the balance of areas in the image, between loch/land, and sky, and the lighting, are perfect.
I found myself frustrated, though, at the relative position of the island, wanting the highest area to positioned in the 'gap', and for clear water all around it, visually separate from the left landmass. I reckon it would have been a real classic then.
Nice work, though, you've a good eye for pictorial possibilities!