Polar Vortex Prediction 2025. Forecasts suggest it will bring cold air to much of the u.s. For the gefsv12 forecast issued on 18 december 2024, the winds at 60 degrees north (the mean location of the polar vortex) are forecast to remain stronger than normal for at least the next 2 weeks (bold red line).
See maps of the arctic blast. It is strengthening slower than.