Polar Vortex 2025 Forecast. When the polar vortex is strong, it locks the cold air in the arctic. The second artic outbreak, or polar vortex, is forecast to arrive between january 7 and 13, bring the coldest air of the season to date.
A polar vortex, which is a large pocket of cold air that swirls in place over the. A new polar vortex is developing in the stratosphere over the north pole as nights get longer over the polar regions and temperatures drop.