I do not share these words without significant thought beforehand. I do NOT like how tonight is trending. Data is converging on there being some lone, large supercells blossoming rapidly ahead of the 'main line' of storms. These are extremely concerning to me. The parameters at play are stronger than what occurred on 12/10/2021 should any supercells actually form. That chance is rising. I circled the area of greatest supercell concern which is west TN, KY, and far SW Illinois. Between 5:30P CDT and 8:30P CDT is the greatest supercell concern. I can not lie this has me a but worried. Let's hope and pray they don't form but trends are not good. Any supercell in this environment will move RAPIDLY to the NE and have the ability to produce: strong to violent (EF3+) tornadoes, baseball size hail, and good be on the ground for long periods of time. Specifically that includes the KY Lakes area, Evansville, NW TN, Graves and Marshall County areas.
After that timeframe, if any supercells did form, they will get cannibalized and overtaken by a monster QLCS (line of storms) approaching from the west. That crosses the Mississippi River around 9PM. That line then which will extend from NW Ohio, through Indiana, SE Illinois, west KY, west TN, east Arkansas, and NW Mississippi could produce tornadoes, excessive straight line wind damage, and very large hail. This is an uncommon example to the rule I have told y'all many times before that "lines of storms generally dont produce big tornadoes." This line tonight can and probably will -- regardless of what the uncertain # of supercells did ahead of them.
*Post made: 3:40PM EDT / 2:40PM CDT Wednesday*