The National Weather Service has issued a winter weather advisory for all of Western Pennsylvania starting at midnight.
The advisory also extends across Ohio, northern West Virginia, parts of western Maryland and into western New York.
The weather service forecasts 2 to 4 inches of snow in Pittsburgh, much of it falling before noon Saturday. The advisory expires at 6 p.m. Saturday.
Today's expected high of 15 will be followed by highs in the low 20s Saturday and Sunday, with a low of 3 Saturday night and minus-11 wind chill.
After snow showers on Sunday, temperatures will plummet, reaching a high of 13 and a low of minus-5 on Monday, according to the weather service. Temperatures won't break out of the single digits on Tuesday and Wednesday.
Jon Schmitz: firstname.lastname@example.org, 412-263-1868 and on Twitter @pgtraffic. First Published January 24, 2014 7:20 AM