oh man...I totally, totally forgot about their website. Wow...this has come along way since they started it. This looks incredible.
I love too how they break tornadoes down into "Pre-doppler" and "Doppler" era...that's exactly what I did too many years ago for a lightning round presentation at one of the conferences and what I did in a project I ended up using as senior research. I was always hoping to take that project off the ground but I never really did...I totally suck with math/statistics and I just never trusted my methodology.