The United States Forest Service Northern Region (Region 1) Archives Collection contains materials related to Forest Service history and its administration of the region. The collection contains unpublished and published material including pamphlets, maps, memorandums, correspondence and photographs. The Northern Region encompases 25 million acres in Montana, Washington, Idaho and the Dakotas.
This collection contains 11 volumes of fire danger factor summaries for the United States Forest Service stations in national forests in Montana and Idaho. The volumes track daily temperature, precipitation, humidity, lightning, and wind in national forests during the spring and summer from 1935 to 1945. An additional volume contains compiled fire factor information from 1912 to 1936.