Figure 16-   A plot of the average 0.5 degree Vr Shear (sec ^-1) values for all six tornado producing mesocyclones from
                    T₀-4 through T₀+1. Most notable is the shear value nearly doubles from 0.020 s-1 at T₀-4 to 0.038 s^-1 at
                    tornado formation time (T₀).