North Carolina has a humid subtropical climate with distinct seasons that impact water flow conditions. The state is home to several major surface flows, including the Catawba River, Yadkin River, and Neuse River. These rivers are fed by numerous tributaries and are critical sources of drinking water and recreational activities. Major reservoirs such as Lake Norman and Falls Lake play important roles in managing water supply and mitigating floods. The state's hydrology is influenced by frequent rainfall, which can lead to flash floods and landslides. Snowpack in the Appalachian Mountains affects river flow in the spring and early summer. In recent years, North Carolina has experienced extreme weather events, including hurricanes, that pose significant challenges to managing water resources.