The third heat wave of the year continues, which, according to meteorologists’ forecasts, will last at least until July 20. After a weekend of instability characterized by some intense thunderstorms in northern Italy, temperatures will rise to reach peaks of 43 degrees in Sardinia, where already during the weekend in Oristano it will reach 39 degrees. The drastic increase expected from Monday, according to the Lamma Consortium of Cnr and the Tuscany Region, is attributed to the “Omega configuration.”
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The “Omega configuration”
The Lamma Consortium explains that from the beginning of next week an area of low pressure west of the Iberian Peninsula will draw warm air of desert origin, which will strengthen the anticyclone already present for weeks over our country. At the same time, another area of low pressure will consolidate between Eastern Europe and the Black Sea, giving rise to the “Omega configuration.” The result is that the heart of the anticyclone will shift further east, involving the whole of Italy, including the southern regions, which have so far been less affected by the heat.
The Consortium adds that «an anticyclone works like a large dome that traps warm air. This air descends toward the ground, compresses, and heats up even more. At the same time, high pressure prevents the formation of clouds and blocks the arrival of cooler currents, such as Atlantic ones. The result: clear skies and steadily rising temperatures».
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According to Lamma, the “Omega configuration” is not in itself an exceptional phenomenon, although «climate change is strengthening its anticyclonic component: the high-pressure peak is moving further north, bringing heat up to northern France, England, and even Scandinavia».
Rising temperatures
As of today, the most critical situations in the country are recorded in Florence and Perugia, which will remain under red alert – the highest level of warning – until Sunday. «The heat – says Lorenzo Tedici from iLMeteo.it – is destined to tighten its grip, especially from Sunday onwards».
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