A morning glory is one of the rarest cloud formations in the world and occurs most often in northern Australia near the Gulf of Carpentaria. It's a low-lying tube-shaped cloud that appears to roll through the sky like a baker's rolling pin, sometimes stretching up to 1000km... These clouds are so rare that most people will never see one in their life.
Most commonly seen in Burketown around September to November in the early hours of the morning. These clouds are not fully understood, but there have been different people, with different ideas on why these clouds form.