Bismarck Tribune 10

Dried-up stalks of corn sit in a dry field somewhere in North Dakota during a dry season. The Palmer Drought Severity Index can be used to estimate the relative dryness and the drought severity experienced by farms, like the one in this image. These maps provide snapshots of the drought severity in North Dakota at four points in 1937: January, April, August, and December. In January 1937, the state of North Dakota was suffering from severe drought in the north and extreme drought in the south. However, as the year progresses, the drought severity slowly decreases.
pulitzer source: 
State Historical Society of North Dakota, Drought and Soil Erosion Photograph Collection, 00351-06