The Upper Neosho Watershed (HUC 11070204) is located in southeast Kansas and northeast Oklahoma and covers an area of approximately 4,188 square miles. The hydrology of the watershed is primarily influenced by the Neosho River, which flows through it. The watershed experiences a humid subtropical climate with hot summers and mild winters. Precipitation is evenly distributed throughout the year, with an average annual rainfall of 42 inches. The watershed has several reservoirs, including John Redmond Reservoir and Toronto Reservoir, which provide recreational opportunities and support irrigation for agricultural activities. The snowpack in the watershed is generally minimal due to its location in the southern Great Plains. Interesting climatic trends include increased precipitation in recent years and an increase in the frequency and intensity of extreme weather events, such as floods and droughts.