The Lower Sabine Watershed (HUC 12010005) covers approximately 5,974 square miles in Texas and Louisiana. The watershed is primarily driven by rainfall and has a humid subtropical climate with hot summers and mild winters. The Sabine River is the main surface water feature, with several smaller streams and creeks also present. The Lower Sabine Watershed has a few small reservoirs, including the Toledo Bend Reservoir, which is used for hydroelectric power generation and recreation. The watershed is prone to flooding, particularly during tropical storms and hurricanes. Snow is rare in this region, and the watershed does not typically experience significant snowpack. Climate change is expected to increase the frequency and intensity of extreme weather events in the Lower Sabine Watershed, including floods and droughts.