The Kettle Watershed, also known as the HUC 07030003, is situated in northeastern Washington State and covers an area of approximately 2,867 square miles. The hydrology of the area is mainly influenced by the Columbia River, which flows through the southern part of the watershed, and the Kettle River, which is the main tributary. The watershed experiences a Mediterranean climate, with hot, dry summers and cold, wet winters. The area receives significant amounts of snowfall during the winter months, which contributes to the surface water supply during the drier summer months. The watershed is home to several large reservoirs, including the Franklin D. Roosevelt Lake, which is formed by the Grand Coulee Dam. Interesting climatic facts and trends include a decreasing snowpack in recent years, which could have implications for the water supply of the region in the future.