DORSET residents took to social media yesterday with pictures of a peculiar-looking cloud formation.

The unique formation, known as Undulatus asperatus, was spotted over Castlepoint, Winton, at Bournemouth beach and thinning at Poole Quay.

Proposed in 2009 as a separate classification by the founder of the Cloud Appreciation Society, the name translates roughly to roughened or agitated waves due to its resemblance to the sea.

Although they appear dark and storm-like, they tend to dissipate without a storm following. They are often seen in the plains of the US during the morning or midday hours following thunderstorm activity.