Harrisburg, Pennsylvania – Hot, humid air will fuel another round of thunderstorms across Pennsylvania and the Middle Atlantic states this weekend, bringing a serious threat of flash flooding and travel disruptions through Monday morning.
According to the National Weather Service Middle Atlantic River Forecast Center, showers and storms will become more widespread Sunday and Monday as a slow-moving cold front crosses the region. Rainfall totals of 1 to 2 inches are likely in many spots, with localized areas seeing even higher amounts, especially in south-central Pennsylvania, western Maryland, and northern Virginia.
Motorists should watch for water ponding and rapid rises on creeks and streams, particularly along I-81 from Harrisburg to Hagerstown and on roads near Frederick, Maryland, and Winchester, Virginia. Emergency managers are urging residents in flood-prone neighborhoods to stay alert, have a go-bag ready, and avoid driving through high water. School and work commutes could be delayed Monday morning if flash flooding lingers.
Sunday’s storms mark some of the most widespread July rainfall so far this year, echoing patterns seen during summer 2021. Warnings may be upgraded if rainfall intensifies or storms stall over the region.
Advisories remain in effect through at least Tuesday morning, with additional alerts possible as the weather pattern evolves.
