Looking at a tornadic QLCS event in eastern Mississippi, low level rotation is clear in both the 0.5 degrees SRM and Single Radar Az Shear. At 0.5 degrees, the radar is looking at approximately 1.94km ARL.

At 1.8 degrees, as typical with QLCS tornado events, the rotation is present but not as strong. At 1.8 degrees, the radar is looking at approximately 4.45km ARL. The AZ Shear color curve still does a good job of highlighting the area of concern.

Last I looked at the 0-2km merged Az Shear. There is clearly two areas near each other with high Az Shear values, which is clearly an artifact of either merging multiple levels and/or multiple times. As seen above, there is only one area of rotation. For this reason, I might prefer to look at the single radar non-merged Az Shear over the merged Az Shear — but will wait to see additional cases.

-Tempest Sooner