Camille Seaman, 2013 TED presenter on storm chasing, has been photographing storms since 2008. Her now six year-old collection is called The Big Cloud, a title which is very, very accurate. But more than that, her photos show the storms as the heavens reaching down to us.
Here are two more clouds that seem to be just barely above the Earth's surface. More of Seaman's photos can be seen at this TED article.