(State College) -- The winter storm dumping snow across the midstate will pull out of the region late tonight, but it will leave bone chilling temperatures in its wake.
A wind chill advisory, for the entire midstate, will be in effect from midnight through noon tomorrow.
Barry Lambert, a meteorologist at the National Weather Service in State College, says the arctic low-pressure system known as the polar vortex is again plunging south.
"It's the main core of cold air, right around the North Pole area... and pieces of this deep, cold air mass often break away and funnel down to the south and southeast with the jet stream," he says.
Overnight temperatures in the low single digits, combined with 10 to 20 mile per hour winds, will produce wind chill factors as low as minus-15 degrees.
Those are dangerous conditions that could cause frostbite or lead to hypothermia. Lambert recommends limiting time outdoors and covering as much exposed skin as possible.
The National Weather Service forecast calls for frigid nighttime temperatures through Friday.
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