So it just takes a little bit of sunshine to heat that column of air right back up. (dotearth.blogs.nytimes.com)
Tornadoes, violently rotating columns of air spawned by thunderstorms, occur when available energy — warm, moist air at low levels and cold, drier air above — meets vertical wind shear, which provides the source of the rotation. (livescience.com)
A tornado is a violently spinning column of air in contact with both a cumiliform cloud base and the surface. (sciencedaily.com)