Somerset County was hit with a snowstorm Friday, receiving 4 1/2 inches of snow by 6 p.m. This caused several school districts to close early. Other schools canceled after-school activities.
National Weather Service observer Steve Shaulis said it started snowing at 10 a.m. Friday in Somerset.
"They were right on time with the weather advisory," Shaulis said. He said an additional 2 inches can be expected on Saturday.
Craig Evanego, meteorologist at the National Weather Service in State College, said the snow during the weekend will be lake-effect and upslope snow.
"The snow on Saturday will be caused by an upslope. This happens when air flow encounters some sort of topography, rises up and enhances precipitation," Evanego said.
He said the amount of snow expected on Saturday will be much less than on Friday. The high for Saturday is around 20 degrees.
Pennsylvania Department of Transportation officials have been orchestrating efforts to keep roads clear.
Frank Bendick, assistant manager at PennDOT's Somerset station, said the colder temperatures can have an impact on salt. He said his main concern is having traffic on the roads.
"You need traffic out there to make the salt work. The snow melts and dissolves the salt around it. It's fine as long as the temperature is between 10 to 15 degrees," Bendick said.
He said when the salt and snow mix, it changes the chemical composition and the freezing point.