One question I have is, what killed this monster? On Sunday, we saw a tube sit over Shawnee reservoir for several minutes before moving on and causing destruction and death in the Shawnee area. So I tend to think that the body of water didn't have much to do with the Moore cell dissipating so quickly. I would expect a tornado of that scale to just keep grinding, without the lake effecting it at all. Did the cell that overtook it from Blanchard cut off the inflow? I don't recall any cells further SE of the Moore cell that would have interacted to kill it. But it certainly seemed to fall apart as rapidly as it developed.
One thing I notice on the radar image is that right before the explosion in intensity, there is an area of relatively dry air that forms over Draper Lake, and gets sucked through the precip shield and all the way into the rotation. That happens at the same time as the cell to the south getting sucked into the vortex. I also notice that the little clipper cell had a pretty well-defined inflow notch on the SE flank before it got cut off by the cell further SE. So that little cell was showing signs of intensification prior to being rapidly cut off and swallowed.
I'm not sure what those observations indicate, but it has to be more than coincidence that the influx of both the drier air from the E/NE and the ingestion of the smaller cell from the south both occur almost simultaneously, right at the point of intensification.
