Polar Vortex 2025 News Update. As the polar vortex sweeps across the u.s., electricity demand is expected to surge by 20%. Multiple rounds of frigid, arctic air could sweep across the eastern half of u.s.
Winters with at least one polar vortex disruption/sudden stratospheric warming (ssw) are marked with a black outline (and years with two have two circles). Pieces of the polar vortex are projected to swirl southward out of northern canada and into parts of the u.s.
