This is actually a very old photograph of mine compared to the others that I have on my site but it happens to be my favourite photograph of all time, along side with a church photograph of mine.
I waited several hours for that very cloud to come in over the land area were I lived, it's the start of one of the heaviest snow storms we had in years and I had a clear image of how I wanted to catch it. - Luck for me, it happened in just the way I wanted it.