Whether it is true or not, it cannot be properly studied because it is thought to be crazy. In science, crazy ideas are difficult to study, since this damages the reputation of any researchers who do so. This is a very serious problem, since research funding depends on reputation, and researchers with a reputation for irrational beliefs will have a hard time surviving. In truth, most crazy ideas are a waste of time. Unfortunately, some crazy ideas turn out to be true.
Tornados do put out unexplained energy in the form of high frequency radio waves.
Some tornados apparantly generate a strange type of VHF radio static which can be recieved on standard television sets and used as a crude sort of tornado-detector. As far as I know, the mechanism which produces this signal is unknown. There have been eyewitness reports of strange lights associated with nighttime tornados. Today, the role of electricity in generating tornadoes is generally denied. Even the existence of tornado lights, which seem rather reasonable phenomena in the vicinity of powerful tornadoes, are not recognized as legitimate phenomena by many scientists.