改良藤田スケール
The first documented case of a fire tornado in Australia was during the 2003 Canberra bushfire. It was calculated to have horizontal winds of and vertical air speed of , spawned by its own wind rotation from a pyrocumulonimbus cloud and causing the flashover of in 0.04 seconds. It was also the first known fire tornado to have EF3 wind speeds on the Enhanced Fujita scale and the only known one until the 2018 Carr Fire in California.