The Lower Washita Watershed (HUC 11130304) covers an area of approximately 2,400 square miles in southwestern Oklahoma. The watershed is influenced by the Red River and Washita River, with the latter being the primary source of surface water. The hydrology of the area is characterized by frequent flooding and low flow during dry periods. Snowpack is not a significant factor in the region due to its relatively warm climate. Surface water in the watershed is primarily used for agricultural and municipal purposes. The watershed contains several small reservoirs, but none are major sources of water supply. Interesting climatic trends in the region include an increase in average annual temperature and a decrease in annual precipitation over the last century. These trends are expected to continue in the future, with implications for water availability and agriculture in the area.