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What happens inside a cloud?
Large-scale Processes

You have probably noticed before that individual clouds are often part of an organized system. An example is the squall line, or a line of convective clouds. Sometimes, squall lines can bend so that from the air they look like a bow. In this case, they are called bow echoes and they are associated with strong, potentially damaging winds.

Sometimes, the gusts of wind that precede a thunderstorm can cause a special kind of cloud, called a shelf cloud. These are spectacular looking clouds, as you can see from the pictures on this page.

squall

Next page   -> Large-scale processes continued

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