It looks like a UFO, or an alien ship, but these oddly-shaped clouds snapped by locals west of Brisbane this morning are an ...

A roll cloud is part of the arcus cloud family ... and a temperature inversion—all key ingredients for roll cloud formation. MUST SEE: A rare overcast sunset painted Canada's sky pink The ...

He explained arcus clouds formed along "the leading edge ... strength to those downdrafts," Mr Hayes said. He said the formation did not always need humid conditions, but dew point could indicate ...