Where the Clouds Roll By. Mick Petroff, distributed via a Creative Commons license. A rare tubular cloud formation occurs with regularity only one place on Earth: Northern Australia’s Gulf of Carpentaria. Here, ultra-long “roll clouds” form regularly in fall months. The phenomenon even has its own, geographically specific name, the Morning Glory cloud. Elsewhere in the world, roll clouds pop up only very occasionally, usually associated with sea winds or sometimes thunderstorm downdrafts.