thunderman

Well there was one in April 2010 as well (Yazoo City).

Yeah, was def 2011 I was thinking of (we got clocked good up here too ... most tornado warnings I have ever seen locally)

Oops, yup I put the wrong year!  Fixed ... thanks for pointing that out!

That's interesting. I'll have to try using that method...compared to the one I used as a student volunteer when I was at DTX and GRR. The way that I was taught was to take the height (in meters) of the freezing level...and multiply by 0.013. I still use this today...but just add 5 to whatever value the VOD was and it seems to work good. At my office we pay more attention to the height of the 50 dbz echos and have certain thresholds that we pop the SVR warning on.

Yeah the 50 dbz rule works well.  I use it often as well when trying to to determine severity.