How do tornadoes form? Is there a tornado season? The WeatherBug team put together all you need to know about tornadoes, including how to be safe in case you come across a twister. #weatherbug #weather #wx #knowbefore #tornadoes | WeatherBug

Tornadoes occur on nearly every continent on Earth. Tornadoes form during thunderstorms, when warm moist air collides with cool dry air but will only form when the atmospheric conditions are just right. One of the great mysteries of science is why one storm will produce tornadoes and another won't. Watch Mutant Weather on Sundays at 7pm on National Geographic UK. | National Geographic UK