source: Airmail
For a tornado to start, two air masses must meet, a lower one containing warm, humid air and a higher one containing cool, dry air.During storms, unstable humid warm air moves upward and is stopped by a thin layer of cool dry air. This thin layer act like a "cap" on the warm air below it causing pressure and energy to build as more humid air rises. When the "cap" lets go under the pressure of rising warm air, it releases a huge amount of energy in the form of an upward moving air mass. The air moves in many diffrent ways there for making a tornado!
Lexie<3:)
