On May 21, 2018, at 1:04 PM, Richard Aiken <xxxxxx@gmail.com> wrote:

In the case of tornadoes, very early detection of cell formation should allow you to form your own, counter-rotating cell near the trouble spot. You then allow these to slam together and cancel each other out.

The spin direction of a tornado is determined by the rotation of the entire low pressure weather front that spawns it, and these are primarily governed by Coriolis forces in the atmosphere from planetary rotation.. You would have to, in an relative instant (thunderhead cells grow in a period of one or so hours), conjure up an equally sized low pressure front, spinning the opposite direction, on the right track to create a tornado that has to hit the other one *just right* to stop it.

You can do this?

Congratulations! You just invented a tornado cannon.