Thanks Jimmy and Michael for your replys,

I wasn't aware when Australia was rating tornados, I assumed they may have estimated ratings on the older ones based on old reports and photos? 
I was thinking the same thing Michael about the two ton tractor sounds like they could get a pretty good estimate on the winds speed from that alone. Surely someone took photos of the forest damage and we would know if large trees were ripped from the ground say? Was the tractor report in the official review? I really wish it was online.

Don't get me wrong I do beleive there was a large and probably violent tornado this day, just hoping for more information.


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