A massive winter storm system is bearing down on the United States this weekend, threatening more than half the country’s population with conditions meteorologists are calling unusually dangerous for its scope and intensity.
What makes this storm different isn’t just the snow totals or the cold temperatures in isolation. It’s the combination: an Arctic air mass dropping temperatures to record lows while a slow-moving storm dumps heavy snow across a path stretching from the Rockies to the Atlantic coast. The National Weather Service warned that wind chills could fall below -50F across the Northern Plains, cold enough to cause frostbite on exposed skin within minutes.

