15 Dec GFS Model Forecasts a Cold Start to the Weekend for Most of the U.S.
This data visualization shows the forecast minimum surface temperatures across the western hemisphere at 4:00 am EST on December 15, 2016.
This visualization shows predicted air temperature (at 2 meters) across the entire United States. A distinct transition at the freezing point (32 degrees F and 0 degrees C) and below are represented by blue to white colors, and warmer temperatures are represented from red to yellow. The very cold air across Canada is forecast to spread south and reinforce the bitter cold over midsections of the U.S. by this weekend. Along the Canadian border, from North Dakota to Minnesota, temperatures may remain below 0 Fahrenheit through the weekend.
Link to full article: http://www.nnvl.noaa.gov/MediaDetail2.php?MediaID=1974&MediaTypeID=1