The National Drought Mitigation Center Drought Atlas project is intended to provide a wide range of decision makers with historical drought information and a web-based tool to visualize and assess their risk to drought. A station-based approach lets you find the station closest to your area of interest as well as a cluster of stations that statistically has shown similar precipitation attributes. The stations with the longest period of record, a minimum of 40 years, with the most complete record, were used to compute both the climatological and drought information to provide users with information from the best station data available, through 2017.