Yeah that LLJ should feed tonight's MCS all through the morning tomorrow, so it'll likely go on for quite awhile. HRRR/3km doesn't break out new convection until around, or just after 00z. Good chance it actually happens a bit later than that. Strong capping will be in place just south of the boundary, and with the nocturnal inversion starting to settle in just as the convection finally takes off it makes you wonder just how robust any surface-based convection can get. Good chance tomorrow evening's biggest threat will come from torrential rains from the storms that may have a tendency to train over the same areas as storm motion vectors parallel the nearly stationary boundary.