Subject: Does a tornado (not TStorm) create electricity/lightning? If so, why?

I'm interested in knowing if the funnel cloud itself is responsible 
for generating an electrical charge.  I'm familiar (lightly) with 
electricity/lightning in a thunderstorm, and I've searched the web (a 
number of sites) but I just can't find anything to answer this 
question (I did discover that a tornado generates a great deal of 
energy, but the manifestation of this energy was not described. . .)
Thank you in advance,
Derek

Re: Does a tornado (not TStorm) create electricity/lightning? If so, why?