Roll clouds A long, tubular cloud that appears to roll about a horizontal axis. Often forms along the leading edge of a storm front or gust front.

Shelf clouds can form along the leading edge of a thunderstorm’s gust front, which is the boundary where dense, rain-cooled air from a thunderstorm meets warmer, more humid air near the surface ...

Roll clouds Clouds roll through as weather delays the start of the Honor Roll track meet, Tuesday, May 28, 2024, at Waverly High School. The meet was eventually canceled.