How do horizontal tornadoes form?

The rare meteorological phenomenon of a horizontal tornado is actually a rolling cloud. The sinking cold air causes the warm and moist air on the surface to rise, and the moisture condenses quickly to form a cloud column. Cloud columns take on rare lateral shapes due to changes in atmospheric temperature and wind direction. At first glance, cloud pillars are rolling horizontally in the sky. Pillars of cloud quickly passed through the sky, and people just felt a gust of wind blowing by.

Schematic diagram of horizontal tornado: