Polar Vortex Faltering Weeks Earlier than Ever Recorded
Scientists say the disruption is the earliest on record, with models showing a full breakdown by Nov. 20 and colder air possible across the Northern Hemisphere.
- Meteorologists are monitoring an unusually early weakening of the polar vortex, a vast circulation of cold air above the Arctic, raising the possibility of colder weather across parts of Europe, North America, and Asia.
- Scientists have observed signs of disruption as early as this season, an unprecedented development. Major sudden stratospheric warming events have occurred only three times since the 1950s—in 1958, 1968, and 2025.
- "As far as we know, this is the earliest stratospheric vortex disruption that has been observed," European Centre for Medium-Range Weather Forecast scientists Tim Stockdale and Frederic Vitart told AFP. MIT climatologist Judah Cohen explained the vortex is disrupted from below.
- When the vortex weakens or becomes displaced, the jet stream can become distorted, potentially allowing cold Arctic air to spill into lower latitudes. Scientists are assessing the impact on winter weather systems across the Northern Hemisphere.
- Increased temperature contrast across Eurasia may amplify Rossby waves, making the polar vortex more likely to be disrupted. Scientists are also examining the influence of the strong Nino in the Pacific on atmospheric circulation.
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Early polar vortex disruption could bring colder spells to Europe
Meteorologists warn that an unprecedented early disruption of the polar vortex could increase the risk of cold spells across the Northern Hemisphere, although its impact on the coming winter remains uncertain.
Scientists believe that this phenomenon may be associated with this year's Child, one of the most intense ever recorded.
Experts in climatology have observed an exceptional early disturbance of polar vortex, an area of low atmospheric pressure above the poles, a phenomenon whose consequences are still "uncertain for the weather in Europe," said the meteorological agencies of France and the United Kingdom for AFP, taken over by Agerpres. Polar vortex is a vast phenomenon ...
An early alteration of the polar vortex could trigger cold waves in the northern hemisphere, affecting densely populated regions.The phenomenon, possibly linked to El Niño, is an unprecedented event that increases uncertainty about future weather patterns.
Polar vortex faltering weeks earlier than ever recorded
The polar vortex is a vast region of cold, low-pressure air that normally circulates from west to east high above the Arctic. It generally strengthens through autumn and peaks around January. It can weaken in the second half of winter, typically between January and March, sending bitterly cold air spilling south into Europe, North America and Asia. But scientists say the vortex is already weakening in early November. El Nino effects - "As far a…
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