A First Alert was in effect as a winter storm brought snow across the Philadelphia region Saturday night into Sunday morning.

Public Works officials remind that once the snow begins to fall, it's advised drivers stay off the roads if they can and if you have to drive, be sure to give plow truck drivers plenty of space on the road.

The Pennsylvania Department of Transportation (PennDOT) has temporarily reduced the speed limit to 45 mph on all interstates in the northwest region due to ongoing winter weather conditions.

Snow was moving through the Pittsburgh area Saturday night and was expected to continue into early Sunday morning.

Most areas picked up around 4-7 inches of snow, and while it comes to an end, frigid temperatures are expected to follow.

Western Pennsylvania is gearing up for a snowy weekend. Shannon Hefferan, a meteorologist with the National Weather Service in Moon, said 3 to 6 inches are expected to start falling around 3 p.m. Saturday.

Inches of snow have fallen across various parts of western Pennsylvania following a major storm Saturday night.

PennDOT and the Pennsylvania Turnpike Commission have issued traffic advisories due to an impending winter storm. Expected to start early Saturday morning, residents have been advised to avoid unneces

The Turnpike and Pennsylvania Department of Transportation said the Tier 1 plan prohibits some vehicles on some state roads.