650x366_11160949_hd22The coldest air since last winter is set to move over the Plains and the East during the first half of the new week.  The core of the cold air will focus over the northern Plains and the Great Lakes through at least Wednesday with overnight lows dipping down into the teens, and even the single digits in some normally colder spots. Bone-chilling nights will be followed up by frigid days with highs struggling to reach the 20-degree mark over the regions on Monday and Tuesday. Some locations are forecast to stay below 20 F until Wednesday afternoon, including Minneapolis, Minnesota. Temperatures this low can make it dangerous for outdoors activities if you are not wearing the proper clothing. More