Today, Monday, November 11, is the key date: Italy is experiencing a drastic change in weather conditions, with the arrival of a flow of cold air coming from Northern Europe. The entry of this cold air will trigger the formation of a cyclone over the Italian seas, generating a quick but intense phase of instability that will extend over much of the country.
The next two days
Tuesday, November 12, and Wednesday, November 13, are expected to be the most critical days.
The cyclone that will form could intensify between Sardinia and the Tyrrhenian Sea, leading to an increase in precipitation, with locally intense thunderstorms in various regions of Central-Northern Italy.
The encounter between the polar cold air and the Mediterranean waters, which still retain relatively high temperatures, will favor the formation of extreme phenomena such as intense showers and downpours. Temperatures will register a sharp drop, marking an early return to Winter.
Starting from Tuesday, the arrival of polar air will favor snowfall at relatively low altitudes for the period.
In Piedmont and Liguria, snow is expected around 700 meters, while along the central-northern Apennines, snowfalls could reach beyond 1300/1400 meters. This lowering of the snow line will mark a significant change compared to the recent weeks characterized by mild temperatures and stable weather.
A second smaller but no less insidious cyclone
A second cyclonic system, still fueled by the influx of cold air, will hit these areas between Tuesday and Wednesday, bringing heavy rains and widespread thunderstorms.
Particular attention should be paid to Sicily and Calabria, where thermal contrasts between the cold air and the still warm sea could generate intense thunderstorms. This cold intrusion represents a real preview of Winter, with a significant shift compared to the previous days.
The High Pressure that had dominated in the previous days, ensuring stable weather and temperatures above seasonal averages, will be abruptly replaced by a pattern dominated by Low Pressure and an increase in atmospheric instability.
Strong winds
As often happens, the incoming cold front will also bring an intensification of the winds.
On the coasts of the Tyrrhenian Sea and the Ligurian Sea, gusts up to 60-70 km/h are expected, with consequent storm surges along the exposed coasts. Even the Adriatic sectors, from Romagna to Puglia, will see an increase in wave motion, with waves that could exceed 2-3 meters.
In short, a real upheaval compared to the calm of the past days!
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