Kelvin-Helmholtz in supercell base?

[Rob H]

I've never seen an example of this before, but this picture that I happened upon caught my eye:

http://www.mesoscale.ws/pic2005/050607-26.jpg

Is that Kelvin-Helmholtz instability in there? I didn't know it was possible in a supercell base, but I suppose that would be a decent place to find the conditions necessary. I'm still amazed at some of the pictures that Eric was able to take - absolutely gorgeous supercell regardless of what this feature is.

edit: guess I should have spent a few more minutes Googling... Mike Hollingshead has seen this several times:

http://www.extremeinstability.com/09-7-13b.htm

 

[Mike Hollingshead]

I've never seen an example of this before, but this picture that I happened upon caught my eye:

http://www.mesoscale.ws/pic2005/050607-26.jpg

Is that Kelvin-Helmholtz instability in there? I didn't know it was possible in a supercell base, but I suppose that would be a decent place to find the conditions necessary. I'm still amazed at some of the pictures that Eric was able to take - absolutely gorgeous supercell regardless of what this feature is.

edit: guess I should have spent a few more minutes Googling... Mike Hollingshead has seen this several times:

http://www.extremeinstability.com/09-7-13b.htm

I imagine they somewhat common on supercells, but being on the supercell at that time and looking at the general area might make it more rare. I saw them on that same one of Eric's June 7, 2005. That Valentine one last year was pretty crazy as you could watch them going up and over and crashing pretty easily in real time.

http://www.extremeinstability.com/ss-a1433.jpg

The May 28, 2004 supercell("katrina") also had them for a while. Look over on the far right side. There are two of them very wrapped up into a coil of a wave.