One day I was thinking of what a 4D tornado would look like - and came up with this:
The top part (where it connects to the clouds) - would look like a huge whirling smoke ring (instead of just a spinning disk). As you scan down, this smoke ring would get thinner and larger, and more chaotic - with twists and turns everywhere - and is constantly in motion - the part near the ground would be huge - possibly miles across - it would look like a horribly twisted, thin smoke ring. This tornado could even twist into figure 8 sections, and split the tornado into two pieces in those areas - quite a storm aint it.
Polyhedron Dude