Polar Vortex 2025 Texas Map. The polar vortex is a large area of low pressure and cold air that circles the arctic, which is the northern part of earth. A weaker polar vortex usually means a weaker jet stream, which increases the chance of a more dynamic (colder/snowy) winter pattern over the united states, canada, and/or europe.

Below the map is a closer look at each one of those years. Widespread power outages struck mclennan county during the infamous 2021 storm, but ercot officials say the texas grid is better prepared for the next polar vortex, which could strike next week.