Ideally, we would like to have a TVS detection from the TDA algorithm on this volume, since a tornado is in progress. The missed detection in this case may be due to a distinct lack of precipitation that was observed in the RFD region. South of Stecker we find strong outbound velocities in the region where rain, hail, and other scatterers are returning power to the radar. However, there are very few gates of inbound velocities. It appears the RFD region, on the south side of the tornado, was relatively void of scatterers, and prevented a TVS detection. The red triangle below has been added to aid interpretation.