Harrisburg, Pennsylvania – River levels across the Mid-Atlantic are diverging sharply right now, with northern basins running high enough to impact boating and low-lying areas while southern waterways lag well below seasonal norms.
According to the National Weather Service Middle Atlantic River Forecast Center, recent rainfall pushed streamflows in New York and northern Pennsylvania into the 75th to above-90th percentile range by late Tuesday morning. In contrast, southern basins across Virginia and parts of Maryland remain in the 10th percentile or lower, reflecting ongoing dry conditions.
In Pennsylvania, gauges along the Susquehanna and its northern tributaries are running elevated, especially north of Interstate 80. Communities near Williamsport and Binghamton could see faster currents and minor bank overflow in typical trouble spots. Meanwhile, farther south toward Harrisburg and into Maryland, lower stream levels continue to affect smaller creeks and water supply concerns.
This split pattern is expected to hold through Friday night. Additional rainfall targeting the northern and western basins could sustain or slightly increase flows, while southern areas may see little improvement.
Residents near rivers should avoid fast-moving water and secure loose items along banks. Drivers are urged not to cross water-covered roads, especially in northern counties where runoff remains high.
More updates are likely as rain develops late this week, with advisories possible if northern river levels climb further.
