One thing I've noticed on the HRRR is that it looks like early-day convection may have a bigger impact on the northern reaches of the setup than I previously thought. About 36 hours ago the NAM had a big bullseye of EHI with really nasty parameters along the warm front in northeastern AR through the MO bootheel/NW TN/SW KY. Now it's looking like rain and storms will be ongoing through that area most of the morning/early-mid afternoon keeping the instability down. Meanwhile the threat has dramatically uptrended across Mississippi where the SPC placed the bulk of the Enhanced/now Moderate risk starting yesterday morning. I guess that's why they get paid for this and I don't.
Although it's possible that once the surface low deepening really gets going tomorrow night, the warm front will get pulled north into that area I mentioned, but everything might be a QLCS by then.