Last Updated: December 4, 2025
Pennsylvania's rivers and streams are experiencing significant fluctuations in streamflow, with many areas reporting below-normal conditions that could impact the seasonal activities of water enthusiasts. Key rivers such as the Delaware, Susquehanna, and Allegheny show decreased streamflows, with the Delaware River at Callicoon, NY, having a current streamflow of 1210 cubic feet per second (cfs), a decrease of 5.47 cfs in the last 24 hours, sitting at 64.02% below its normal flow. Similarly, the Susquehanna River near Harrisburg is flowing at 13600 cfs, down 6.85 cfs from the previous day, which is at a notable 55.43% below its typical flow level. Such conditions could affect recreational activities and local ecosystems, while also indicating potential drought concerns in these watersheds.
For whitewater enthusiasts, reduced streamflows on popular routes such as the Youghiogheny River at Ohiopyle (634 cfs, -64.27% from normal) and Loyalsock Creek at Loyalsockville (262 cfs, -65.54% from normal) might mean less challenging conditions, but they should remain vigilant as sudden weather changes can lead to rapid increases in water levels and thus risks. Conversely, Muddy Creek near Portersville experienced an extraordinary jump in streamflow, now at 102 cfs which is an alarming 4515.38% increase in the last 24 hours, indicating the potential for flooding. This dramatic surge could pose hazards to riverbank stability and adjacent communities, necessitating close monitoring. Water enthusiasts and residents in affected areas should stay informed about current conditions and advisories from local authorities, particularly during these times of abnormal streamflows.
Pennsylvania experiences a humid continental climate with average precipitation of around 42 inches per year. Major surface flows include the Susquehanna River, Delaware River, and Ohio River. The Susquehanna River Basin encompasses 27,500 square miles and is home to numerous reservoirs and dams including the Conowingo Dam and Raystown Lake. Major tributaries of the Susquehanna include the Juniata River and West Branch Susquehanna River. The Delaware River Basin spans multiple states and contains several reservoirs and dams, such as the Francis E. Walter Dam and Beltzville Lake. The Ohio River Basin covers parts of western Pennsylvania and includes the Allegheny River and Monongahela River. Watershed and snowpack data can impact hydrology in these areas, particularly in relation to flooding and drought conditions.