The graph below displays the magnitude of vertical wind shear from Z height to 5000m for strong cases (on x-axis) versus weak cases (on y-axis). The greater the distance from the y=x (45deg) line (gray line on graph), the more uniqueness there is between the strong and weak cases. The strong cases exhibit greater vertical wind shear throughout the entire column, but this difference is maximized in the mid levels (can also be seen in the length of the composite hodographs above).
The second graph displays the angle the <strong, weak> vector. The greater the difference from 45 degrees, the more unique the two classes are. We can see that this is maximized at 2500m. More specifically, the 2500m-5000m layer shear exhibits the greatest difference between the strong and weak classes, and thus is the best layer at distinguishing between the two.
Also I created a histogram and density graph of the wind events for future reference in comparing to empirical results:
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