What looked like a fairly mediocre setup with a solid dry air punch advecting in to kill storms turned into an incredible day as an isolated tornadic supercell rooted onto the warm front and dove east. Plenty of intense moments on the chase, including a point in Sauk City where traffic slowed us down enough to where the circulation crossed right overhead!
Here's a shot from my chase partner Jonathan Williamson...I'll have video up later. Chasing today in IA/SD/NE...hoping for some sort of outflow boundary magic.
Incredible inflow tail to the right, rapidly rotating wall cloud in the center, rear flank downdraft punch to the left.