I took this photo of a small tornado south of Jetmore, Kansas, last month. Even though the funnel does not reach all the way to the ground, it is definitely a tornado since the whirling debris cloud is evidence the storm's twisting winds reach all the way down.
There is a trend in meteorology these days to attempt to warn of tornadoes based on their forecast intensity. I have attempted to discourage these efforts because there is no evidence weather science has the skill to do this consistently well.
But, let us assume meteorology could consistently well tell us whether a tornado was going to be moderate, strong, or violent. What does that accomplish since the recommendations for taking shelter are virtually the same?
Photo by the Topeka Capital-Journal, their story of the disaster is here.
For now, I believe both the public and weather science would be best served by improving the accuracy of existing tornado warnings with a focus on minimizing false alarms (i.e., warning issued, no tornado occurs).