From the US National Weather Service
UPDATE: Winter Storm Warning from 7PM Sat. to 12PM Mon. with snowfall totals around 9″-16″. There is an increasing possibility for wintry mix in the Mon Valley due to the chance for low-level warm air to move in. If there is a northward shift in the track, the wintry mix could reach as far north as Pittsburgh with higher snowfall amounts to the north.
