Polar Vortex Forecast Texas 2025 Predictions. As you can see, a la niña phase has a higher chance of producing a polar vortex collapse event. It usually produces one later in winter, compared to an el niño.

As you can see, a la niña phase has a higher chance of producing a polar vortex collapse event. It’s a permanent feature that typically sits over the north pole, keeping the hemisphere’s coldest air in the polar region.