Burning Index 6 : An estimate of the potential difficulty of fire containment as it relates to the flame length at the most rapidly spreading portion of a fire's perimeter
Flathead National Forest Fire Information, US Department of Interior, US Department of Agriculture (USDA), US Forest Service, Fire Terminology, MT, USA 2003. http://www.fs.fed.us/nwacfire/home/terminology.htm l, (For Fr - Amer) {70}