You had some wonderful sky the other day! Wow.
Your countryside looks very much like you could have taken the pics where I live! Everything around me looks the same. Flat countryside, lines of trees. Lots of fields. So far no such stormy weather in this year's May, though (last year yielded some nice storm cloud pics in May for me, too).
Your black+white versions, heavily contrasted as they are, are ever so dramatic, they give me funny feelings in the stomach - oppressive is the word.