Figure 18-  A plot of the average 0.5 degree mesocyclone core diameter (nm) for all six tornado producing mesocyclones
                                                        from T₀-4 through T₀+1.  The steady increase in Vr Shear and Rotational Velocity occurred as the
                                                        mesocyclone core diameter decreased from 0.9 nm to 0.5 nm.