News alert: “A bitterly cold, arctic air mass will continue to bring dangerously-low temperatures and wind chill values across the central and eastern U.S. on Monday, with several locations approaching or exceeding record lows. Afternoon highs across the Midwest and Ohio Valley will be below 0F, with wind chill values from the northern Plains to the Central Appalachians as low as -20F to -50F. ”

• Outside magazine “A polar vortex has descended upon the northern and central U.S. bringing sub-zero temperatures, “life-threatening wind chill,” and the coldest weather felt in decades. Twenty-six cities are under wind-chill warnings or watches. Cities such as Chicago and Minneapolis will record temperatures of 20 to 30 below. In North Dakota, wind chills were as low as negative 50 degrees.”