Flash flood warning in effect for Lawrence and Mercer counties amid storms and rising water levels

The warning for Lawrence and Mercer counties was issued late Tuesday evening and is in effect until early Wednesday morning

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Published April 01, 2026

A flash flood warning has been issued for parts of Pennsylvania, with officials urging residents to remain alert as heavy rain moves through the region.

According to the National Weather Service, the warning for Lawrence and Mercer counties was issued late Tuesday evening and is in effect until early Wednesday morning.

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“At 10:33 p.m., Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 1.5 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly,” states the weather service.

“Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.”

Authorities say several communities could be affected, including New Castle, Hermitage, Sharon and Grove City, along with a number of smaller towns and rural areas.

The warning highlights the risk of rapidly rising water levels in creeks, streets and low-lying areas, particularly where drainage is poor.

Residents in affected areas are being advised to avoid flooded roads and remain cautious overnight as conditions may change quickly due to ongoing thunderstorms.

Emergency officials continue to monitor the situation as rainfall persists across the region.

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