In your oven add a dew point of at least 55 degrees Fahrenheit, and turn your oven on to 350 degrees Fahrenheit, this will replicate the heat of the sun! To start grab a large mixing bowl and add atleast 1000 Joules/Kilogram of CAPE and mix these together with your lifting mechanism, this creates the basis for you to add your wind shear to. Then add your choosing for a source of moisture, this will help in making sure your clouds tower into the atmosphere! The more your clouds tower the better, as this shows that the atmosphere is unstable, and that your storm is growing! Once you have your storm growing, add your wind shear, this will help in making sure your storm is rotating, and that it has the potential to produce a tornado! Finally, add your source of instability, this will help in making sure your storm is strong, and put it in the oven. After about 2 hours your storm should be ready to produce a tornado, and you can enjoy your severe thunderstorm!