Beaver Tail?

[NealRasmussen]

I would say it's a beaver tail into an RFD erroded wallcloud or lowering. Could well have had lifting along the leading edge, forming the beaver tail or inflow tail. Could also have had a lot of shear going on with the RFD cutting in like that. Especially from the nice shot with the bridge. Many many wall clouds feed on outflow from the Forward Flank Downdraft (main core). Whether it's a harmless interaction of outflow from the FFD and outflow from the RFD, or not so harmless is the question looking at the motions of scud tags and cloud might answer.

Could be a left over, or newly forming, wall cloud with a nice inflow tail. Could be real close to saturated air getting lifted by another core's outflow.

 

[John Farley]

Just came across this . . .

http://www.youtube.com/watch?v=QlzwAeNNd78&feature=related

Obviously not the "beaver tail" cloud we've been discussing, but apparently something that was behind it.

Edit: A little more searching also yielded these:

http://www.youtube.com/watch?v=TLc_XBSLI2g

http://www.youtube.com/watch?v=VNU37IwOxiw&feature=related

http://www.youtube.com/watch?v=x-sUFud1WNk&feature=related

Taking all this into consideration, it would suggest to me that, despite the damage survey finding of only straight line wind damage, at least a weak tornado/waterspout probably did occur. Thoughts?

 

[Gary Stofer]

Here are a couple shots worthy of looking at, from a storm I took shots of during Indiana's event last week. The location was near Morgantown, IN. This cell was in the process of consuming, or merging with another cell to the south at the time this shot was taken, and was tornado warned with the hook to our due west. Storm motion was to the right or northeast. I was calling this a beaver tail when I saw it but it is not attached to the wall cloud or structure of the cell we were viewing at the time. It almost looked like more like the shelf cloud from the other storm.