A winter weather advisory is in effect for all of southwest Pennsylvania until 4 p.m. Tuesday.
A heavy band of snow showers along a line extending from Beaver County to Fayette County pounded the South Hills for much of the morning. Snow can accumulate a quick one or two inches where these bands of heavier snow showers persist, according to the National Weather Service. Visibilities can become sharply reduced and untreated pavements can become snow-covered and slippery.
The snow caused heavy delays on Interstate 79 from the Washington County line to the Parkway West. And traffic was at a standstill on Washington Pike near Bridgeville around 9:30 a.m. Around that same time Upper St. Clair Patch received reports of slow traffic and very slick roadways near and on Boyce Road.
The bands of snow are expected to continute to shift across the area into the afternoon.
The returned to class Tuesday morning. No delays or closings were issued.