The Polecat Snake Watershed (HUC 11110101) covers an area of approximately 1,615 square miles in southeastern Idaho. The watershed is characterized by a semi-arid climate with hot summers and cold winters. The hydrology of the watershed is dominated by the Snake River, which is the primary source of surface water in the region. Snowpack in the Polecat Snake Watershed varies from year to year, with more significant snow accumulation occurring in the higher elevations. The primary reservoirs in the watershed are the American Falls Reservoir and the Palisades Reservoir, which provide storage for irrigation, flood control, and hydroelectric power generation. Interesting climatic facts and trends in the Polecat Snake Watershed include a long-term drying trend, with decreased snowpack and earlier snowmelt, as well as an increase in extreme weather events, such as floods and droughts.