Total streamflow across the Allegheny River was last observed at 173,599 cfs, and is expected to yield approximately 344,329 acre-ft of water today; about 167% of normal. River levels are high. Average streamflow for this time of year is 103,818 cfs, with recent peaks last observed on 2024-04-13 when daily discharge volume was observed at 474,640 cfs.

Maximum discharge along the river is currently at the Allegheny River At Natrona reporting a streamflow rate of 37,200 cfs. This is also the highest stage along the Allegheny River, with a gauge stage of 13.81 ft at this location. This river is monitored from 10 different streamgauging stations along the Allegheny River, the highest being situated at an altitude of 1,457 ft, the Allegheny River At Port Allegany.

The Allegheny River spans over 325 miles and originates in Potter County, Pennsylvania. It flows through the Allegheny Mountains and ultimately joins the Monongahela River to form the Ohio River. Native American tribes such as the Seneca, Shawnee, and Mohawk once inhabited the region before European settlers arrived in the 1700s. The river's hydrology and course have been altered by various dams, including the Kinzua Dam, which created the Allegheny Reservoir. The Conemaugh River Lake and Tionesta Lake are other major reservoirs along the river. The Allegheny River is used for a variety of recreational activities, such as fishing, boating, and camping. The river is also a source of drinking water for multiple towns and cities, and its watersheds support agricultural industries throughout the region.