Summer in North America means severe weather for much of the continent. Powerful storms are accompanied by unusual cloud formations, signs of the violent atmospheric conditions that spawn turbulent weather. Photographer Mitch Dobrowner and guide Roger Hill have spent the past few summers traveling the US chasing storms, and creating stunning black-and-white images in the process. Click through to see some of these gorgeous photos of some ugly weather.
News: Digital Photography Review (dpreview.com)