The Otter Tail watershed, located in west-central Minnesota, covers an area of approximately 4,200 square miles. The hydrology of the area is dominated by the Otter Tail River, which flows from the northeastern corner of the watershed into the Red River of the North. The watershed experiences cold winters and warm summers, with an average annual precipitation of 25-30 inches. Snowpack varies widely depending on the year, but typically accumulates between November and April. Surface waters within the watershed are primarily used for recreation, with numerous lakes and streams supporting fishing and boating activities. Reservoirs within the watershed serve as important sources of hydroelectric power and flood control. Climate change is expected to impact the Otter Tail watershed, with potential changes in precipitation patterns and increased frequency and severity of extreme weather events.