CNN claims that the Arctic is ice free, and that -30C air in Minnesota came from the Arctic.
The meteorologist who made these claims is incompetent to be discussing science. If the Arctic Ocean was ice-free, the minimum possible average temperature would be the freezing point of seawater. If that air traveled south and mixed with tropical air, it would then have to be warmer than -2C.
The only way that such cold air would be moving south is if the Arctic is covered with ice.