Well, here’s a tornado I’ve created in Blender.
The 3-Part tutorial series: http://www.benamend.com/?s=How+to+Create+a+Tornado
Sorry that the video quality isn’t the greatest; I’ll be getting a much better encoder shortly, and I’ll continue posting video tutorials once that’s finished.
Here’s another video of a ‘tornado’ destroying an empty toolshed (this is what my next video tutorial will be on):
Feedback is appreciated, as I’d like to know whether or not people find these tutorials interesting (so that if they don’t, I’ll know not to record any more on this topic :P)