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ROLL CLOUDS

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These clouds are often born out of a storm’s downdraft. Sinking cold air causes warm, moist air near the ocean’s surface to rise. When the air reaches higher altitudes, the moisture in it condenses to form such an unusual cloud. The cloud is rolled into a tube by the winds from the storm.

CUMULONIMBUS CLOUDS

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Cumulonimbus clouds rise vertically until they hit a natural barrier. After they encounter the barrier which we call tropopause, the clouds flatten out. This type of clouds usually heralds the onset of a severe storm. Cumulonimbus clouds can cast a large shadow on the land below.