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What Is a “Cloud Wall”?
The so-called “cloud wall” is not a literal wall, but rather a dense formation of storm clouds, often associated with powerful weather systems like typhoons.

Meteorologists explain that these formations are typically part of a larger structure known as a shelf cloud or arcus cloud. These clouds form along the leading edge of a storm system, where cooler air pushes beneath warmer air, forcing it upward.

This rapid uplift creates a thick, layered cloud that can appear: