Polar Vortex 2025 Chicago Map. On tuesday, after the first significant winter storm of the year blasted a huge swath of the country with ice, snow. The polar vortex is an area of low pressure and cold air that circulates around the north and south poles.
A weaker polar vortex usually means a weaker jet stream, which increases the chance of a more dynamic. This article was updated on the 25th of.