Polar Vortex February 2025 Predictions. The polar vortex is a band of strong winds circling the north pole.a constant, stable spin of those winds keeps the arctic air locked in place. A strong/stable polar vortex usually means strong polar circulation and jet stream.
As you can see, a la niña phase has a higher chance of producing a polar vortex collapse event. A strong polar vortex usually means a strong jet stream pattern.