'Incredible' clouds appear above Sydney

An unusual cloud formation has covered skies in parts of Sydney as NSW was again hit by wild weather.

The mammatus clouds. Source: Twitter - @SKYview_Aerial

Social media has lit up after an unusual cloud formation was seen around Sydney on Wednesday.

Known as mammatus clouds, the formation is most often associated with thunderstorms.

"Never seen anything like it," one Twitter user wrote.

More in English via SBS News.