A number, on a scale of 1 to 6, that reflects frequency and character of cloud-to-ground lightning. The scale is exponential, based on powers of 2 (i.e., LAL 3 indicates twice the lightning of LAL 2)
United States Department of Agriculture USDA Forest Service, Forests and Rangelands, Glossary of Terms, National Fire Plan, Washington, D.C., USA 2012. http://www.forestsandrangelands.gov/resources/glos sary/a.shtml, (For Fr - Amer) {497}