That's a great topic of discussion that, indeed - to my knowledge - has not been extensively studied or focused on. It seems to be a pretty rare occurrence and requires very specific and rare circumstances, namely a near-zero CIN environment with sufficient PBL mixing (or sufficient low-level WAA/isentropic lift) to get parcels going. While WAA/isentropic lift often generates precipitation and convective storms, it often times occurs north of a surface boundary, and given the synoptic nature, usually results in widespread development. Getting convective storms to fire south of a surface boundary AND in an area with very low CIN AND with low spatial coverage is much less likely.
