After multiple rounds of snow have impacted the region, a burst of bitter, dangerous cold arrives on Thursday. According to the National Weather Service, overnight lows starting Wednesday evening will drop well below zero, with wind chill values approaching 20 below in the morning. Temperatures in that range can cause frostbite on exposed skin in as little as 30 minutes. Slightly warmer air arrives by Friday, but wind chills in the morning will still over around the zero degree range through early next week.