Rolling Clouds Later, as an adult, I fl ew halfway around the world to see an even stranger cloud in Australia. Far out at sea, two winds collided, sending a giant wave of air toward the land. If you could have seen the wave, it


would have looked like an ocean wave rolling across the sea. As it rolled over the sea, it picked up moist air. Vapor on the front of the wave


cooled and condensed. It made a giant cloud shaped like a tube. It rolled over fl at land, with nothing to stop it or slow it. T is rare cloud is called the Morning Glory.


Bubbling Clouds We don’t know exactly how all clouds form. Some can be pretty hard to fi nd, too. I got lucky driving through a storm in France one day and saw something amazing. Above me, the storm clouds started


to change. T e clouds sagged in spots, forming what looked like bubbles. Soon the bubbles fi lled the sky. T ese clouds don’t follow the same


rules as other clouds. T ey’re made mostly of ice crystals. Yet they don’t always form high in the sky.


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This cloud is just like the Morning Glory cloud I saw.


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