We just learned that about the type of storm called a Supercell.
Another thing like a tornado is called a Dust Devil.
These are spinning air that happens without any kind of a thunderstorm around.
Since they happen a lot in the day time, some people in the past thought they were like ghosts.
In the middle east they are sometimes called djin, the word for genie.
(from: wikipedia - dust devil)
Kid Facts - Blast from the past: Occluded Front