When I arrived, I noticed a definite lowering of the clouds.

The wall cloud was forming and feeding off of the huge amount of moisture to the north of it and building although rotating very slowly.
There was some radio chatter about a rear flank downdraft opening up but I never saw it. Quickly the wall cloud slimmed down and continued feeding on warm moisture.
I was in a good position with inflow directly overhead. It kept the rain from cloaking the area. The cloud slowly rotated and radar finally indicated a cause for a tornado warning. If there was a rear flank downdraft, I think it choked out the tornadogenesis as the wall cloud became smaller. As it became smaller it began to rotate.

It was rumored that the storm was moving SE instead of straight E. Unfortunately, that's where my house is.
Part II coming soon.
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