Polar Vortex In March 2025. Below is the image of the polar vortex in the lower stratosphere at the 50mb pressure level (20km/12.5miles) 3 weeks ago. In january it was stretched polar vortex (pv) events quickly followed by a snap back to a strong pv and then the whole cycle repeating itself.

The forecast trend of the pv. A series of blasts of polar vortex air from the north will bring subfreezing temperatures as well as ice and snowstorms to 40 us states, affecting more than 250 million.