A large portion of western Pennsylvania, including the Pittsburgh region, is under a tornado watch until Monday evening.
The watch also covers counties in West Virginia and Ohio, and is expected to remain in effect until 7 p.m.
A tornado watch has been issued for parts of Maryland, Ohio, Pennsylvania and West Virginia until 7 PM EDT pic.twitter.com/l8ODDYLDt5
— NWS Tornado (@NWStornado) May 1, 2017
Pennsylvania counties included in the watch are Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford, Erie, Fayette, Forest, Greene, Indiana, Jefferson, Lawrence, Mercer, Venango, Washington and Westmoreland.
According to the National Weather Service in Pittsburgh, multiple tornadoes, hail and winds up to 75 miles per hour are all possible.