The tornado is the symbol of your mind where you feel much of the stress. Your emotions are just like that tornado and you do not know how to control those feelings. If you dream about the tornado quite often, you should start thinking about your life and the changes that needs to be done. There is obviously something that doesnt suit you and you must change it if you wish to live with the peaceful mind. The dream could also indicate ups and downs in your life.
Read more about dreaming of Tornado in other dream meanings interpretations.