In some cases the clouds in the eyewall can form vertical or nearly vertical walls.
Cumulonimbus clouds
what is a vertical clouds
Clouds of vertical development, like cumulonimbus clouds, grow vertically as a result of strong updrafts and can produce thunderstorms and severe weather. The other three families of clouds - cirrus, stratus, and cumulus - are generally horizontal in structure and do not grow vertically like clouds of vertical development.
Tornadoes are associated with cumulonimbus clouds, which are tall, dense clouds capable of producing severe weather. Hurricanes are associated with cumulonimbus clouds as well, but they also have a distinct type called the tropical cyclone, characterized by a large circular area of low pressure with spiraling bands of thunderstorms.
Tornadoes develop during thunderstorms, which are themselves giant cumulonimbus clouds. Some tornadoes are produced by hurricanes, but most are not.
Cumulonimbus clouds are most common in hurricanes. These clouds are large, dense, and capable of producing heavy rainfall and thunderstorms. They are characteristic of the intense convection and strong updrafts found in hurricanes.
Hurricanes, or clouds
cumulonimbus
There are clouds in both hurricanes and tornadoes. While a hurricane consists of one enormous cloud mass, a tornado consists of a funnel cloud extending from the base of a thunderstorm.
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vertical development means that two clouds are forming together to make one
The Great Dark Spot, hurricanes, and swirling clouds.