Roll Clouds

Before a storm arrives, occasionally in certain parts of the world, a Roll Cloud forms such as the one above in Australia. It is a type of low cloud formation that forms on the leading edge of thunderstorms. Roll Clouds aren't dangerous even though they look very ominous, because they are not attached to the storm at all. One of the most famous spots to see Roll Clouds is off the coast of Queensland, Australia, where they are called "Morning Glory" clouds that form regularly in the fall months.


Photo: Rob Sherrock