The San Jacinto Watershed (HUC 18070202) covers an area of 1,780 square miles in southern California. It is home to the San Jacinto Mountains, which have a significant impact on the area's hydrology. The watershed is primarily fed by snowpack, which accumulates in the mountains during the winter months and melts in the spring and summer, providing surface water for the region. The watershed also contains several reservoirs, including Lake Hemet and Diamond Valley Lake, which are used for water storage and recreation. Interesting climatic facts and trends include the fact that the San Jacinto Mountains receive some of the highest levels of precipitation in southern California, with an average annual rainfall of 30-40 inches. However, recent trends indicate that the region is experiencing longer and more severe droughts, which have led to a decline in snowpack and surface water availability. This has had significant impacts on both the environment and local communities, highlighting the need for sustainable water management practices in the region.