Winter 2024-2025: A Potential Return to Heavy Snowfall Across Europe and Italy
A notable shift in the Polar Vortex suggests the winter of 2024-2025 could bring a dramatic return to colder temperatures and substantial snowfall across Europe, particularly in Italy, a leading meteorological source suggests. This isn’t a prediction, but a scientifically-grounded assessment based on the anticipated weakening of the Polar Vortex.
Last year,while parts of central Europe,including the British Isles,switzerland,and even cities like London and Paris,experienced substantial snowfalls in late December,Italy saw only light dustings.A north wind’s humidity was blocked by the alpine Arc, resulting in an adiabatic fall wind. While Milan saw some snowflakes, the Alps experienced late and limited snowfall, and the Apennines remained largely snow-free.
This year, however, presents a stark contrast. The Polar Vortex is currently in a complex and weakened state, with signals also emanating from the South Pole. The potential for significant snowfall is high, particularly in the Alps, Northern Italy, central and southern Italy, Sardinia, and the mountains of Sicily, if the current trends continue. The Vortex is not only weak but could even be “broken” – a term used to describe a significant warming of the stratosphere, approximately 30 kilometers above the Earth.
This stratospheric warming can interact with the troposphere, triggering high-pressure systems and stretching the Polar Vortex, leading to increased meridional exchange. A strong warming event could facilitate the westward expansion of the Siberian High Pressure system, pushing frigid air across Europe – a scenario reminiscent of winters in 2012, 1985, 1996, 2017, and 2018.
The current situation is particularly noteworthy as the Polar Vortex is already exceptionally weak,and Siberia is experiencing temperatures approximately 15°C below average – akin to mid-December conditions. The anticipated stratospheric warming, expected around November 18-20, will likely impact atmospheric circulation 10-20 days later, as meteorological autumn concludes and temperatures across Northern Europe and Russia decline. Notably, Siberia is not expected to experience significant warming, suggesting a january-like pattern occurring in late November. If these conditions fully materialize, the resulting cold could rival that of 1985, 1956, or 1929.
This potential for intense cold arrives amidst ongoing discussions about global warming, a seeming paradox. However, experts emphasize that global warming doesn’t preclude extreme weather events. “The globe is decidedly warmer than average, but…weather events can be generated that are so extreme that they have similarities with phenomena from eras in which global warming was less intense,” one source explained. This is driven by climate extremization and Arctic Amplification.
Recent extreme weather events support this assessment. Athens experienced a snowstorm a few years ago,and while the Siberian wind known as Burian didn’t reach Italy,a cold wave severely impacted Spain,causing record snowfall in Madrid and widespread disruption. The Azores, with their subtropical climate, also saw snow last year – a significant anomaly. Similarly, the Canary Islands, known for their eternal spring, recently experienced storms, hailstorms, and abundant snow on Mount Teide.These events are not isolated incidents; similar extreme cold has been observed across North America, South Africa, South America, Australia, China, and Japan.
it’s crucial to note that the possibility of cold weather does not negate the long-term trend of global warming,and extreme heat waves are still expected. Actually,a violent autumnal heat wave is currently affecting much of the United States,with temperatures perhaps breaking November records,following recent cold snaps that saw temperatures drop below 0°C along the Gulf of Mexico.
Ultimately, the current climate is “crazy” and “extreme.” Climate change doesn’t mean perpetual heat, but rather an increase in weather extremes, driven by complex dynamics that require extensive climatological study to fully understand.
The coming weeks will be crucial in determining the extent of this potential cold wave.Further updates and in-depth analysis will be provided as the situation evolves.
