What is the cause of a tornado?

Tornadoes form in unusually violent thunderstorms when there is sufficient (1) instability and (2) wind shear present in the lower atmosphere. Instability refers to unusually warm and humid conditions in the lower atmosphere, and possibly cooler than usual conditions in the upper atmosphere. read more

Causes of Tornadoes Tornadoes are cause by the thunderstorms being extremely large, unstable and with wind shear in the lower region of the atmosphere. Instability refers to the hot and humid conditions in the lower atmosphere and cooler conditions in the upper atmosphere. read more

Tornadoes form on land and are natural phenomena caused by violent thunderstorms whenever there is enough wind shear and instability in the lower atmosphere. read more