This is a difficult case with the spin ups nearly perpendicular to the radial where most of the damage occurred. TORP wouldn’t have provided much lead time as it very quickly jumped from 21-76% in one volume scan after the couplet had already developed. There was a well-defined velocity signature at the 1217z scan from KLWX. AzShear started to light up at 1214z. Given the environment, it would have been difficult to lean on AzShear and make a tornado warning decision before any signature developed on radar, but in hindsight some lead time may have been possible using that 1214z AzShear signature. -newt