Not as it is, no. It's not a true representation of a tornado as the updraft is provided at the top of the funnel whereas in an actual tornado, the updraft is provided by heat on the ground. The only reason real tornadoes are wider at the top is because that's where the clouds are. A more accurate representation of a tornado would be to use some sort of heated plate on the bottom of the machine instead of a fan at the top - but that's more dangerous, uses more power, and the vortex isn't nearly as impressive
Alternatively just do a little image modification
Alternatively just do a little image modification
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