The Little Missouri River Watershed (HUC 08040103) spans over 13,000 square miles across North Dakota, South Dakota, and Montana. The watershed is characterized by a semi-arid climate, with average annual precipitation ranging from 12-20 inches, and a unique hydrology due to its karst topography. The Little Missouri River is the main surface water source in the watershed, with many small streams and tributaries feeding into it. The watershed also contains several reservoirs, including Lake Sakakawea, which was formed by the Garrison Dam. Snowpack is generally minimal in the area, with an average snowfall of just 23 inches per year. However, when snow does accumulate, it can have significant impacts on the hydrology and water availability in the spring and summer. Due to its location in the Great Plains, the Little Missouri River Watershed is also prone to frequent and severe thunderstorms. In recent years, the region has experienced an increase in extreme weather events, including both drought and flooding.