Any storm is formed when the by-products of clouds condense

Any storm is formed when condensation occurs,the byproducts of the clouds.Condensation releases heat,and heat becomes the energy that drives huge upward drafts of air.The more condensation and the bigger the storm clouds grow,the more powerful those updrafts become.
In supercells, this rising airmass is particularly strong.As the air climbs, it can change direction and start to move more quickly.Finally, at the storm's base,if there is a lot of moisture,a huge cloud base develops,giving the tornado something to feed off later, if it gets that far.