Re: tornados

in karate there is a saying of "use your opponents force against himself"
in great forest fires often making another firewall against the on coming fire will put the fire out.
since tornadoes are wind forces of great cyclical speeds i wonder if there is a way of putting the tornado out?
nuclear testings have created great wind forces.
can the resultant high winds of nuclear testing be used in a controlled manner against the wind forces of a tornadoe???

• the backfire consumes all the fuel which would otherwise be available to the unwanted fire;
• the backfire deprives the advancing fire of some of the oxygen it needs (this is much less important).

You are suggesting an analogous effect: by setting up opposing winds, we could deprive a tornado of the wind force needed to continue. However, this is not quite right.

Tornadoes feed on the energy of intense updrafts, regions of rising, warm, moist air. In order to kill a tornado, we would have to such the heat from the air over a large area (and where would we put it? Heat has to go somewhere!)

A possible alternative, which you suggest, would be to use precisely-placed energy from, say, a nuclear explosion to heat up the cold air so that there would be no reason for the warm air to move.

Aside from the problem of fallout and the severe damage such an explosion would do to every electronic device within 100 miles (not to mention the shockwave, which would interact quite destructively with the things you were trying to protect!), what you are suggesting requires a shaped explosion. But a shaped explosion requires that a container live long enough to channel the force of the explosion; and temperatures in a nuclear blast are hot enough to instantly vaporize any material at all.

I'm afraid your idea won't work.

backfire

A deliberately-set fire whose purpose is to consume things required by an unwanted fire.

firebreak

A gap from which all combustible material has been removed; the effect is to deprive an advancing fire of what it needs to continue.