The Tygart Valley Watershed (HUC 05020001) covers an area of approximately 2,678 square miles in West Virginia, USA. The watershed is characterized by a humid continental climate with warm summers and cold winters. The hydrology of the watershed is dominated by the Tygart River, which flows through the entire length of the watershed. The snowpack in the watershed is typically light, with most snow accumulating in the higher elevations. The surface water in the watershed is used for various purposes, including irrigation, municipal water supply, and recreation. The reservoirs in the watershed are used primarily for hydroelectric power generation. Interesting climatic facts and trends include a trend towards warmer temperatures and increased precipitation in recent years, which could have significant impacts on the hydrology and ecology of the watershed.