It had pretty quickly grown into a cold outflow mess, with an extremely So the early stuff in Kansas continues for a couple hours, doing little more than some mild hail reports. Just the orientation of the stuff popping off in Arkansas suggests to me effects of that outflow boundary are arcing up near Joplin, likely south a bit.

On this wide view of the radar you can see the boundary in Arkansas popping off storms as well as theĭry line in the plains and the gravity wave across central Missouri Then in nearly the same area you get a storm that pops up just ahead of it(but later on and more east in better low level orientation and flow) and that storm The old storm in southeast Kansas had been going for hours and did really The storm popping up later and to the east in the better environment, made a massive difference. It's much more clear on radar but figured I should point it out on here. Note that what moves over Joplin isn't a continuation of the convection in southeast Kansas but new storms marked by those new overshooting tops that pop up right before moving What is for sure is that just ahead of the dry line early, the winds were veered southwest, but that to the east, if they weren't already south, they soon would be.

I'd say there are some effects of that boundary back Just west of them it appears that 'line' curves and points northwest towards the northeast corner of Oklahoma. If you watch real close where the Arkansas storms are firing, you can see them doing so on the same sort of line. Here is a closer in look with Joplin marked with the box. Your browser does not support the video tag.

Joplin missouri tornado path length