Polar Vortex 2025 Forecast. Recent signals indicate the possibility of a block at high latitudes, with a strengthening of geopotential height anomalies over greenland and northern europe. Early data shows that the polar vortex is likely to be weaker than normal in the winter of 2024/2025.

The polar vortex (pv) continues to transition to different phases or modes at breakneck speed. Signals are pointing toward a displaced polar vortex this winter, which typically contributes to a negative nao.