A enormous shower cloud

[miscat1066]

Bigger than I could see with my eyes without moving my head about

[Isac]

You've captured remarkable cloud activity in this shot and I think the monotone really pushes that home with some great contrasts and a good variety of shades. Well done.

[miscat1066]

Micro changes to contrast. It would have looks weird in colour. Clouds are meant for BW, I think. The sun is burned out at the right but this was a very wide view merging 2 wide angle photos.

[wigz]

Very dramatic shot with excellent detail of the cloud and good contrast against the sky.