PENNSYLVANIA FLOW REPORT

Last Updated: December 29, 2025

Streamflow levels across Pennsylvania are currently 51.0% of normal, with the Ohio River At Sewickley reporting the highest discharge in the state with 38600cfs and gauge stage of 15.76 ft. Meanwhile, the Woodcock Creek At Blooming Valley is seeing a spike in streamflows today after experiencing a 715.76% increase since yesterday, and currently running at 642cfs.

Maximum gauge stage in the state was last observed at the Crooked Cr Bl Catlin Hollow At Middlebury Center, currently reporting a stage of 39.27ft. The Monongahela River At Elizabeth in the Lower Monongahela watershed is surging for this time of year at 21100cfs, about 28.2% of normal.

       



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.


       

Winter Storm Warnings

December 29 2025

Pennsylvania residents, brace for severe weather conditions across the state. A Winter Weather Advisory is in effect for Cambria, Clearfield, Elk, and Somerset counties with snow accumulations between 2 and 4 inches, and gusty winds as high as 65 mph causing potentially dangerous commutes and tree damage. The McKean and Warren counties face a Lake Effect Snow Warning with heavy snowfall between 3 and 9 inches, and winds up to 50 mph that could significantly impair travel. Furthermore, a High Wind Warning includes Bedford, Blair, Cambria, Clearfield, Northern Centre, and Somerset counties, expecting damaging winds that could lead to widespread power outages and challenging travel for high profile vehicles. Wind Advisories covering multiple counties, including Columbia, Montour, Northumberland, Schuylkill, Sullivan, and others, warn of gusts up to 55 mph, with the possibility of downed limbs and power outages. Residents in major areas like Pittsburgh and Philadelphia should be alert for hazardous driving conditions and potential power disruptions. Stay indoors if possible and prepare for emergency situations.


       
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