A supercell thunderstorm is a powerful and long-lasting storm characterized by rotation and a persistent updraft. It's worth considering if global warming could potentially increase the frequency of these storms in Europe.

Europe is bracing for a future with more frequent and intense severe weather events, as a new study published in Science Advances reveals that climate change is intensifying supercell thunderstorms across the continent.

Supercell thunderstorms, characterized by a deep, rotating column of air called a mesocyclone, are among the most damaging weather events in Europe. These powerful storms bring strong winds, very large hail, and heavy rain, often resulting in significant property damage and increasing insurance loss claims. In 2023, severe convective storms, including supercell thunderstorms, were the world's costliest type of natural hazard, reaching total insured losses of nearly €55 billion.

Scientists at the University of Bern and ETH Zurich developed a high-resolution simulation model to track supercell thunderstorms in Europe. The new model uses digital mapping techniques to simulate storm cells at a fine scale, offering a more detailed picture of storm development.

The Alps have been identified as a hotspot for supercell thunderstorms. Approximately 38 and 61 of these storms occur on the northern and southern slopes of the Alps, respectively, each season. If global temperatures rise by 3°C above pre-industrial levels, the study predicts up to a 50 per cent increase in supercell occurrences in the Alps. This means that the Alpine region and parts of Central and Eastern Europe can expect a significant increase in storm activity.

However, the study highlights the diverse effects of climate change in Europe, with some regions experiencing an increase in storm activity and others a decrease. The Iberian Peninsula and the southwest of France could see a decrease in supercell thunderstorms.

The study underscores the urgent need for European countries to prepare for a future with more frequent and intense severe weather events. In recent years, supercell thunderstorms have caused widespread damage across Europe. For example, another powerful supercell thunderstorm hit Italy in August last week, causing widespread damage across Rimini and Ravenna. A supercell thunderstorm also struck L'Hôpital-le-Grand in France's Loire department in June, producing hailstones up to 6 cm in diameter.

Understanding the conditions that create supercell storms is essential for better preparedness. Supercell thunderstorms form under conditions where there is warm, moist air near the ground, cooler air higher up, and wind that changes direction with height. This knowledge can help meteorologists predict and track these storms more accurately, allowing for timely evacuation warnings and disaster preparedness measures.

In conclusion, the study published in Science Advances reveals that climate change is intensifying supercell thunderstorms in Europe. European countries must take urgent action to prepare for a future with more frequent and intense severe weather events, focusing on improving weather forecasting, disaster preparedness, and mitigation measures to reduce the impact of these destructive storms.

A supercell thunderstorm is a powerful and long-lasting storm characterized by rotation and a persistent updraft. It's worth considering if global warming could potentially increase the frequency of these storms in Europe.