What is the time between ignition and discovery of lightning fires?

Abstract

A recent study of fire reports gives some information helpful in planning for discovery and suppression of lightning fires. Reports from national forests during the period 1940-44 show that 46 percent of such fires are discovered in the first hour on Washington forests, but only about 22 percent are discovered in the first hour on southern and eastern Oregon forests.

Citation

Morris, William G. 1947. What is the time between ignition and discovery of lightning fires?. PNW Old Series Research Notes No. 40, p. 1-5