To add to the intrigue, the 12z HRRR deterministic forecast now has the initial mesovortex growing upscale, becoming a bonafide closed circulation. At the forecast end (+36h), you can argue the structure resembles a TC (remaining somewhat asymmetrical).

I'll keep watching... pic.twitter.com/rVQ1ayuvjt

— Philippe Papin (@pppapin) August 13, 2020