Video shows thundersnow rolling through Pittsburgh area

Thundersnow rolled through parts of western Pennsylvania overnight, showing up on a doorbell camera in Westmoreland County.

Video from Mt. Pleasant shows snow blowing across the camera before there's a flash of lightning, followed by a loud crack and rumble of thunder. First Alert Meteorologist Ray Petelin says he got several reports of thundersnow as a front moved in.

What is thundersnow?

According to the National Oceanic and Atmospheric Administration , thunderstorms are less common in the winter, but thundersnow happens when lightning occurs during a snowstorm.

Thundersnow can be found where there is relatively strong instability and abundant moisture above the surface, like above a warm front, the NOAA says.

The National Weather Service says thundersnow generally produces high