In a City of McCook truck, Paul Younger sprays sand this morning onto streets dusted with a light snow. Busy intersections were becoming slick about mid-morning. There were a few late starts around Southwest Nebraska, but elsewhere around Nebraska, the arctic cold front disrupted schools and businesses today. Temperatures were about 10-20 degrees below average in the northern and central Plains, the National Weather Service said. Wind chills as low as 30 below zero (minus 34 Celsius) were expected in some spots. The extreme cold could keep the state in a deep chill Friday as well.