A massive winter storm swept through Pittsburgh on Sunday, expecting to dump at least of foot of snow across most of the region. A winter storm warning is in effect for Western Pennsylvania until noon Monday, with upward of 15 inches possible in some areas. By 9:25 a.m., a record 5.3 inches of snow had fallen at the region’s official climate site at Pittsburgh International Airport, setting a new record for Jan. 25. Mayor Corey O’Connor said dozens of plow and salt trucks were deployed on city s