Polar Vortex 2025 Chicago. In chicago, the national weather service said that colder air wrapping into the system from the north and northwest tuesday will allow for rain to gradually mix with/change. Pieces of the polar vortex are projected to swirl southward out of northern canada and into parts of the u.s.
Forecasts suggest it will bring cold air to much of the u.s. Arctic attack to begin 2025: