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UPDATE, 2:25 p.m.: As of Wednesday afternoon, the National Weather service forecast for Lynchburg had been revised slightly to a low of 3 degrees tonight with a wind chill value as low as -4 overnight.

Wind chill is essentially how cold it feels on a person’s skin when the wind is factored in.

A surge of Arctic air is pushing into the region today, according to the weather service. Winds are expected to increase through the morning, with gusts possibly reaching up to 45 mph in most areas and possibly above 50 mph at higher elevations, the weather service said. The strongest winds are expected late morning through the afternoon.

The wind could topple trees and produce scattered power outages.

“If you plan to be outside today, tonight, or Thursday, please take the necessary precautions to protect yourself and your family members against the bitter cold conditions. … Frostbite and hypothermia can occur if proper precautions are not taken,” the weather service said.

By Sunday, high temperatures are forecast to return to the 50s.

Photos: Deep freeze blankets parts of U.S.