The Upper Green watershed (HUC 14040101) covers a land area of approximately 1.2 million acres in Wyoming, USA. The hydrology of the region is dominated by the Green River and its tributaries, which provide a significant source of surface water for the area. The watershed is also characterized by its high-altitude snowpack, which feeds into the river during the spring thaw. The reservoirs in the region are primarily used for irrigation and recreation, and are susceptible to changes in climate and precipitation patterns. Interesting climatic facts include the region's high elevation and proximity to the Rocky Mountains, which contribute to its unique climate and weather patterns. Recent trends suggest that temperatures in the region are increasing, and snowpack levels may be declining. These changes have implications for water resources, agriculture, and natural ecosystems in the region.