This risk had not gone unnoticed and has been tracked here at The Weather Centre for at least a couple days.
The storm system responsible will be ejecting northeast. As it does, showers and thunderstorms will loosely form along a somewhat linear boundary, maintaining the possibility for some discrete super cells. Here's a very localized image forecast off the most recent WRF, thanks to WxCaster.
This is maximum reflectivity, meaning this is theoretically as bad as things could get with the storms, and believe that this will not verify in Missouri. Arkansas seems more reasonable, however, with those red lines likely being more of discrete super cells than diagonal line segments.
Tomorrow, we will be your storm central for the severe storms, here at The Weather Centre.