A quick spin up occurred just east of the KDMX radar that was difficult to identify on velocity data alone with any amount of lead time. There was some enhancement in surface convergence at the 1604z scan, but potentially not enough to grab your attention or warrant a tornado warning. By the next scan at 1606z, there was a couplet with 30kt+ of Vrot. At the 1607z scan, there was a CC drop collocated with the couplet. It might have been difficult to get much lead time on this tornado with radar data alone. That said, the two screenshots from TORP/AzShear might have led you to issuing, or at least drawing up the warning, at the 1604z scan with the sharp jump in probability and AzShear maximum as noted on the graphs on the left. This is a good example of where the product could have gotten you a minute or two extra of lead time. -newt