The new anticyclone will last for 5 days: what is expected for Halloween and Christmas

Italy’s weather pattern will shift dramatically over the coming week, transitioning from high pressure to an Atlantic disturbance before stabilizing again. Meteorologists forecast that a new anticyclone will hold off Atlantic disturbances until Friday, October 30. However, a cold front is expected to arrive with the weekend of October 31 and November 1, bringing clouds, rain, and mountain snow. This change follows a transitional period earlier in the month characterized by instability and a sharp drop in temperatures. The current atmospheric situation is dominated by northern cold currents accompanying high-level stratus clouds that have not produced significant precipitation. Temperatures are already decreasing, with overnight lows dropping below eight to ten degrees Celsius on the northern plains and inland central areas. During the day, increased sunshine under the high pressure allows maximum values to rise above twenty degrees Celsius, particularly in the center-south and major islands. Experts from Ilmeteo.it noted that recent projections from the European Centre for Medium-Range Weather Forecasts indicate an initial atmospheric break in the latter part of the week. From Friday, October 30 onward, a colder and more unstable front is expected to descend from northeastern Europe. This upcoming shift coincides with Halloween on Saturday, October 31, and All Saints’ Day on Sunday, November 1. While six days remain before the exact trajectory of the cold front can be confirmed, current projections suggest that clouds and precipitation will primarily affect the south and Sicily. Some phenomena are possible in northwestern Italy, while other regions will see increasing cloud cover but remain substantially dry. Both maximum and minimum temperatures will experience a significant drop due to the cold front, falling below seasonal averages. On All Saints’ Day, a low-pressure vortex could form, directly impacting central and southern regions with bad weather. The north is expected to see better conditions, though still cold. Updates in the coming days will clarify the specific evolution and which regions suffer the most severe effects. Looking back at the previous weekend of October 24 and 25, the country experienced a late autumn transition marked by an Atlantic perturbation linked to Storm Austen. Colonel Mario Giuliacci and experts from 3B Meteo described how this system triggered a cyclonic vortex over the Mediterranean, causing irregular precipitation and strong winds. Cold currents descending from the Balkans and France caused a decisive temperature decline. In the north-central regions, maximum values dropped by three to four degrees Celsius, widely falling below the twenty-degree threshold. Nighttime lows dipped below ten degrees Celsius, reaching single digits even in Rome. The temperature drop was more gradual in the south, becoming noticeable mainly from Sunday. Strong Bora gusts were recorded on the upper Adriatic, while the Maestral wind affected Sardinia and the Tyrrhenian Sea. Snow levels on Alpine border ranges initially sat around 1,200 to 1,300 meters. On Saturday, October 24, residual morning instability persisted on the western Alps with light snowfall from 1,200 to 1,300 meters up. Accumulations and showers occurred in the northeast, specifically in Veneto and Friuli-Venezia Giulia, with snow above 1,300 to 1,500 meters. These conditions attenuated by evening, giving way to wide clearings. The rest of the north remained mostly dry and sunny, except for local morning fog banks along the Po Valley. Central Italy saw a calm morning followed by a marked deterioration in the afternoon on the Adriatic side and along the Apennine ridge, with showers and thunderstorms extending to the coasts by night. Southern Italy and the islands faced intensifying afternoon instability starting in Campania, with rain and thunderstorms spreading toward the Tyrrhenian coast of Calabria, Lucania, and marginally into Puglia. Some showers hit northeastern Sicily, while the rest of the island and Sardinia remained drier, though windy. Sunday, October 25, brought fair weather and clear skies to the northeast and plains. A rapid deterioration returned in the afternoon to the central-western Alpine borders, though snow fell at higher elevations above 2,000 to 2,200 meters. Central Italy remained largely stable or lightly cloudy, with some compact clouds between Tuscany and the Adriatic strip, and isolated evening drizzle in Versilia. In the south and islands, final residual rains occurred in the morning on lower Calabria, northern Sicily, the Gargano promontory, and western Sardinia. These cleared rapidly during the day. By Monday, October 26, the return of the anticyclone restored atmospheric stability and a gradual increase in temperatures across the country.