This is a personal project i have been working on for a couple of days now. The idea is to achieve a decent tornado effect using Houdini. I am very interested in the fact that you can "model" your own field forces in SOP then import them into DOP as, for eg. velocity or density fields.
Next steps could be developing a flexible and procedural tornado asset; i also need to introduce some other elements to the set to achieve a better sense of scale.