How Do Tornadoes Form?
When warm moist air meets cool dry air, the atmosphere becomes unstable.
The warm and cool air start horizontally spinning
and when an up draft comes along it pushes the air funnel vertical.
In a thunderstorm the updrafts and downdrafts aren't stable.
Look into 'What is a Thunderstorm,' 'What is a Super cell Thunderstorm',
'What is a Cumulonimbus' and 'What is a Funnel Cloud' if you want to learn more.
'What is a Cumulonimbus' and 'What is a Funnel Cloud' if you want to learn more.