Douglas Burts, who posted this video shot at the Tetlin Juction Fire August 16, 2013, called it Alaska Firenado. While I’m not sure that there is an official definition of the term, there is definitely rotation in this smoke column, and it appears to be more than just horizontal roll vortices. Whatever we call it, this fire behavior is very impressive.
One more load and I think we can hook this thing.
Looks like a pyrocumulus mesocyclone to me. Wiki defines the phenomenon as a firestorm. http://en.wikipedia.org/wiki/Firestorm. That’s pretty impressive to see what appears to be entire trees getting tossed into the air. That would make it somewhere in the neighbor hood of a EF-2 tornado with wind speeds in excess of 111MPH.