These extraordinary images show a series of wavelike clouds looming over the south coast, reports Daily Mail.
The unique formation, known as Undulatus asperatus, develops when undulation in the atmosphere causes air to move up and down.
When wind makes contact with the base of low-lying clouds, a striking wavy motion then appears.
Although they appear dark and gloomy, they usually dissipate without a storm following.
The incredible shots, taken on an iPhone, were captured by amateur cloud photographer, Simon Hammond, in locations across Dorset.
The 48-year-old said: 'When I first saw them I thought, 'this is something quite special. It was pure luck that I stumbled across them as I hadn't headed out to take pictures.