Snow is expected to blanket much of central Pennsylvania through the day today. A winter weather advisory has been issued for several counties, with 2 to 4 inches expected in Dauphin, Cumberland, Perry, and Lebanon counties. York and Lancaster counties could see up to 5 inches, while areas around Gettysburg and Chambersburg are under a winter storm warning, with 4 to 6 inches predicted. Snow will likely persist throughout the week, with cold temperatures keeping any accumulation in place. The National Weather Service is calling for a new snow accumulation today of 1 to 3 inches in the Lewistown area, then tomorrow expect windy conditions and blowing snow, all causing deteriorating travel conditions.