SPC did a very rare midday day 3 update to put parts of MS in a slight severe risk. Main threats look to be hail and straight line winds. Although a couple tornadoes can't be ruled out, this really isn't looking like a tornado threat at this time. The early runs of the HRRR are showing two strong helicity tracks across parts of the delta, though. The 1:00am SPC update with give more detail on the threats so have a better idea of what to expect then.