The Teton watershed (HUC 17040204) is located in western Wyoming and eastern Idaho, covering an area of approximately 3,400 square miles. The hydrology of the watershed is dominated by the Snake River, which flows through the Grand Teton and Yellowstone National Parks. The watershed receives significant snowfall during the winter months, with snowpack levels reaching up to 150% of average in some years. Surface water in the Teton watershed is used for irrigation, drinking water, and recreation. The watershed is also home to several large reservoirs, including Jackson Lake and Palisades Reservoir. These reservoirs store water for use by downstream users, as well as for hydroelectric power generation. Interesting climatic facts in the Teton watershed include the high variability of snowpack levels and the occurrence of frequent thunderstorms during the summer months. Climate trends in the region show an overall increase in temperatures and a decrease in snowpack levels, which could have significant impacts on water availability in the future.