Tornadoes

This article is about the weather phenomenon. For other uses, see Tornado (disambiguation). Union City, Oklahoma tornado (1973) A tornado is a violently rotating column of air which is in contact with both a cumulonimbus (or, in rare cases, cumulus) cloud base and the surface of the earth. Tornadoes can come in many shapes, but are typically in the form of a visible condensation funnel, with the narrow end touching the earth. Often, a cloud of debris encircles the lower portion of ...