28/01/2026
As global temperatures rise, winters are milder on average and snow cover is declining. Yet warming also alters atmospheric dynamics, sometimes increasing winter disruption.
Key mechanisms include:
🌀 Polar vortex shifts – when weakened or displaced, it can amplify jet stream swings and push Arctic air south.
💧 More atmospheric moisture – warmer air and oceans fuel heavier snow, sleet, or freezing rain when cold air is present.
⚖️ Competing effects – reduced temperature contrasts can weaken storms, while extremes may intensify.
The result: fewer cold events overall, but potentially sharper impacts when they occur.
Understanding this complexity strengthens forecasting, early warnings, and preparedness.
