Polar Vortex 2024 Usa Update. Arctic oscillation and polar vortex analysis and forecasts. The polar vortex is coming—and raising the odds for intense winter weather.

The polar vortex occasionally weakens, allowing arctic air to drift down into the united states. When the ao turns negative, it tends to mean that something has happened in the arctic that leads to milder conditions and a weaker polar vortex, allowing cold to.