Trying to apply what I learned in Maya to the Houdini. Based on a normal tonado, I created another cup-shape tube with points as a fuel source. Used three disturbance microsolvers trying to get the tornado's details out, but still looks sticky. Only after compositing and adding lensflare in Nuke, the sim seems better.
Also thanks to Steve Knipping's tutorial about volumetric rendering:
cgcircuit.com/bundle-details.php?val=28
Plate is bought from envato with license, made by CineudinGeek.
videohive.net/item/sand-storm/12661694