New 'Omega' Heatwave Traps Europe in Scorching Temperatures

Europe is bracing for its third major heatwave of the year, with scientists warning that climate change is turning extreme temperatures from a future statistical possibility into a destructive daily reality. Italy and Western Europe are on high alert starting Monday, July 13, as the "Omega" weather pattern traps intense heat over the continent.

The new heatwave is attributed to a low-pressure system west of the Iberian Peninsula, which will draw in hot, desert-origin air masses. This system will intensify an anticyclone that has persisted over the region for weeks. Simultaneously, another low-pressure system is expected to form between Eastern Europe and the Black Sea. This combination creates the "Omega" formation, a meteorological phenomenon that traps hot air over Europe.

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An anticyclone acts like a large dome that traps hot air. This air sinks towards the ground, compresses, and heats up even more. At the same time, high pressure prevents cloud formation and blocks cooler air currents from the Atlantic. The result is clear skies and steadily rising temperatures.

"An anticyclone acts like a large dome that traps hot air," explain experts from Italy's National Research Council (CNR). "This air sinks towards the ground, compresses, and heats up even more. At the same time, high pressure prevents cloud formation and blocks cooler air currents from the Atlantic. The result is clear skies and steadily rising temperatures."

Scientists elaborate on the mechanism sustaining the phenomenon: "An anticyclone is stronger the hotter the air feeding it, especially at mid-altitudes. When hot air from subtropical regions moves north towards central Europe, the anticyclone has a longer lifespan and can persist for weeks." This requires a specific combination: a low-pressure system on the western side of the anticyclone, which, rotating counterclockwise, pulls hot air from the African desert and pushes it toward Europe. The system acts like a wave; when the peak of high pressure stabilizes, another low-pressure vortex forms.

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Western Europe had its hottest June on record.