In western Pennsylvania, Allegheny County and Pittsburgh officials declared a state of emergency as residents dealt with flooding and damage from the torrential downpours.
The worst damage in Ohio was across the north-central part of the state, where the National Weather Service confirmed a tornado in Shelby and were investigating tornado reports in several counties, meteorologist Walter Fitzgerald said.
|©Richelle via WKYC
|NBC affiliate WKYC obtained this storm photograph from a viewer who said it was taken over Richland County, Ohio, on Thursday. The formation is known as a supercell, a well organized and notably intense thunderstorm.