A tornado has touched down about 50 miles southwest of Pittsburgh, destroying some homes.
Authorities said it touched down around 5 p.m. Friday near Ligonier, and caused heavy damage in surrounding areas. There were no immediate reports of injuries, but crews are still responding to the damage.
``It's not pretty here,'' Westmoreland County Emergency Management spokesman Dan Stevens told the Pittsburgh Tribune-Review. ``We're still assessing.''
A shelter has been set up at the Ligonier YMCA, and Route 711 is closed in the area.
Dispatchers reported both eastbound lanes of Interstate 70 were closed because of fallen trees. There were reports of downed power lines, and a house was struck by lightning in Donegal Township.
The intense weather is moving eastwards, bringing high winds and heavy rain. An inflatable sports dome near Pittsburgh collapsed after the storms tore a hole in the roof, but no injuries were reported there.