Tornado's are visible funnel of condensed water. What if we freeze instantly the water in tornado. freeze it instantly. i was looking for chemical to do this and got this url
Is there a way to chemically freeze ice?
ammonium nitrate can be used to freeze instantly. pour this from flight or send autonomous car to spray on tornado...imagination is plenty.
right from the cloud to bottom of funnel, it will freeze and so the wind will blow the ice to ground.
u need water for tornado...solid will change the perspective..if u have solid, it will break and gets thrown out and the tornado can be overcome.