With blizzard conditions causing impassible road conditions, Pennsylvania closed interstates 83, 78, and part of Interstate 81 at 12:30 p.m. and is expecting to close additional roads as conditions deteriorate.

Interstate 81 is closed from the Maryland line to Interstate 80.

"The National Weather Service issued blizzard warnings for several counties in Pennsylvania and visibility is at or near zero," said Governor Edward G. Rendell in explaining his action in closing the highways. "Motorists must stay off interstates 81, 83, and 78 until my administration lifts the restriction."

PennDOT crews are continuing to treat roadways to keep them passable for emergency crews only. The agency will continue to treat roadways throughout the storm until precipitation stops and roads are clear.