The storms also caused a hospital near Reading to lose power for about 45 minutes, the Reading Eagle reported.
Weather service meteorologist Charles Ross in State College said a weather spotter reported that a possible tornado touched down in North Annville Township before 8 p.m. The township is about 20 miles east of Harrisburg.
Ross said there were multiple reports of debris scattered in the area, but there was no information on whether anyone was injured in the storm. Weather service officials will likely survey the area Sunday to confirm whether a tornado hit, he said.
"We do know there was plenty of severe weather going through," he said.
Trees, poles and wires were downed in various parts of Lebanon County, the Lebanon Daily News reported.
Electric company Met-Ed reported that hundreds of customers were without power in the Lebanon and Reading areas.
St. Joseph's Medical Center in Bern Township experienced a power outage due to the storms, but none of its 109 patients were on life support equipment, hospital spokesman Michael B. Jupina told the Reading Eagle. Much of the hospital's critical equipment had battery backup, Jupina said, although ambulance crews were called to stand by for a possible evacuation if the power had remained out.
Ambulances were told to take patients to Reading Hospital's emergency room during the outage, the newspaper reported.
