I've been experimenting with different climatic events leading up to the interactive installation at the Judith Wright in a couple of weeks. One climatic event that I find interesting is twisters.
In Australia I've only ever seen water spouts and whirlpools; with the later being created as a kid by moving faster and faster around the edges of a swimming pool until a vortex is created. This was always difficult in a square pool.
Anyway, these photos are of an early prototype I created inside an old tea chest. There are a couple of different ways you can create a vortex chamber, which can be found online. The method I chose uses a low-to-high pressure change along with fan to create negative pressure inside a semi-sealed container.