We’re comparing AzShear to velocity, SRM, and reflectivity data. I started off focusing on the cell with the longest touchdown near the Mississippi Alabama border. If I was forecasting this event real time the AzShear would help to increase my confidence in length of the period the tornado was on the ground. That’s due to the comparison between the AzShear and SRM.
The rotation signature on the SRM alone appears to weaken as the cell gets closer to Alabama.
Meanwhile, the AzShear holds onto a stronger signature longer aligning more with the actual touchdown. In that case it’s more helpful. 
The only difficulty for me is reprogramming my brain to not look at AzShear the same way I look at velocity. I’m accustomed to finding the couplet, and it’s tempting to do the same with the AzShear product.
AzShear was also helpful in analyzing the southernmost cell that was also showing rotation. Since it was farther from the radar site my confidence in a possible tornado was increased due to the max in the AzShear.
It stands out more in comparison to the velocity data. The cell doesn’t have your typical look of a supercell so reflectivity wasn’t as helpful.
Taylor Johnson
CPTI upper left, New MDA upper right, legacy MDA lower right, digital MD lower left.
It uses a surface temperature of 63F, and a surface dew point of 50F, both more than 10 degrees below the nearby observations. These inaccurately low values give, as one would expect, no sign of instability (CAPE=0). Looking at the modified NUCAPS gives a different picture, however.
In the modified sounding, the surface temp is 69, and the dew point is 65, which is much closer to the observed surface obs. This changes your surface-based CAPE to 2055 J/kg, vs. 0 from the unmodified. It also has a sharper low level inversion, which one wood expect based on the stratus deck in place.
Sure enough, the mesoanalysis shows CAPE at around 2000 J/kg. Clearly, this is another case where the modified NUCAPS sounding is a noticeable improvement over the unmodified sounding.