n. Behavior of a fire that produces firebrands that are transported by ambient winds, fire whirls, and/or convection columns causing spot fires ahead of the main fire perimeter (Andrews 1996; NWCG 2005).
Spotting can occur over distances ranging from a few meters to tens of kilometers ahead of the flaming front. Albini (1983) described short-range, intermediate-range, and long-range spotting. Short-range spotting can reach up to several tens of meters, intermediate-range spotting can reach up to several kilometers, and long-range spotting can reach distances of tens of kilometers ahead of the main fire (Albini 1983).
There are three important aspects surrounding the spotting issue: 1) the source of the firebrands and their type, size, and number; 2) distance that the firebrands are carried and their means of transport; and 3) number or relative frequency of spot fires ignited (Andrews 1996).