Excellent shot... it's rare to see a tornado with such a LPish-looking updraft, partly because the LP's develop a poor precip cascade. However there is certainly a decent one present here (along with a bulky anvil). I wonder if this was formerly a great storm or if we're seeing part of another cell. I'd be surprised if this updraft was putting out all that anvil & precip.
That was my exact impression as well. Looks not only LPish but low-topped; that can't be more than 30,000 feet. And I agree, the anvil doesn't look like it's a part of the storm.
I think in this pic you are only seeing one half of the updraft...the rest of the updraft is hidden in the precipitation/anvil.