@washingtonpost: 🥶 Stunning cold is crashing southward from the Arctic into the Lower 48 states. It could break hundreds of records this weekend into early next week. The bitter cold will arrive in the wake of another blockbuster storm sweeping the nation.   The Arctic blast will produce the planet’s biggest negative temperature anomalies over parts of the western and central United States, in some places up to 60 degrees below normal. It will make for icy NFL playoff games in Kansas City and Buffalo this weekend and frigid Iowa caucuses Monday, and could test the Texas power grid.   Wind chills below minus-40 degrees are forecast for much of the northern Plains and northern Rockies. "This will pose an increased risk of frostbite on exposed skin and hypothermia,” the National Weather Service warned. “Have a cold survival kit if you must travel.”   More than 28 million people are under wind chill alerts from eastern Washington state to Missouri. #arcticblast #severecold