The National Weather Service has issued an ice storm warning for Centre County until 1 a.m. Wednesday. Accumulations of up to a half-inch of ice are possible.
Bald Eagle Area School District closed Wednesday "due to power outages and trees down across secondary roads," the district reported.
Most Centre County schools were open Wednesday morning. Many schools in counties to the west were delayed or closed.
Major icing will make travel hazardous and could cause power outages, the National Weather Service said.
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At about 7:15 p.m., Ferguson Township police responded to a downed power line across state Route 45 between Tadpole Road and the entrance to the Ag Progress Days site in Rock Springs and closed traffic about 30 minutes later.
Eastbound traffic is being rerouted to Whitehall Road via Deibler Road. Westbound traffic is being diverted to Whitehall along Tadpole.
Police estimate the power line will be cleared by 9 p.m.
A power outage Tuesday night left 1,021 West Penn Power customers in State College without electricity.
Witnesses near South Atherton Street described a sudden flash low is bein+to the ground before the outage. Company spokesman Rob Lombardo said the cause is under investigation, but the source of the outage appears to have come from the Atherton Street power substation.
Lombardo said West Penn Power received the first reports of the outage at 6:43 p.m. He said crews working on the problem hoped to restore power by 8:50 p.m.
A downed tree was also reported in Spring Township in the 700 block of Musser Lane.
In Walker Township, emergency crews tended to a downed power line on Jacksonville Road near the Interstate 80 interchange.