Regarding software, I have found the Digital atmosphere and RAOB programs. For sounding analysis, the ROAB program seems especially powerful. Both of these programs are not free but I don't mind spending money on something that does a good job. Does anyone here regularly use these programs?
The 2nd Feb, 2005 supercell would be an interesting one to analyse if possible. There was an afternoon sounding that day. Though, whether the data can be imported into the RAOB program is another question. I guess the storm-relative helicity that day was rather high. Would be nice to put a number to it though.