Fig. 10. Four panels depicting storm-relative velocity valid at 2136 UTC. The yellow circle represents the radar identified mesocyclone. The top-left panel shows pure convergence at an elevation of 970 m. The top-right shows cyclonic convergence at 3630 m. At 6200 m, the bottom-left panel shows cyclonic rotation and the last panel, the bottom-right, pure divergence near the storm top of 10570 m was evident.