In the coming days, the maxi anticyclone that currently envelops our entire country, essentially “devouring” this phase of winter, will be threatened by a cold cyclonic vortex descending from northern Europe and heading towards our alpine areas.
Above all, it will be necessary to monitor what happens next. Friday December 22winter solstice day.
After a few days characterized by the predominance of the sun and a progressive increase in temperatures, especially during the day, from Thursday December 21 we will see the arrival of a flow of cold air of polar origin from Scandinavia, moving south and is expected to affect the alpine zone, particularly on the foreign slopes. Once these cold, typically winter currents reach near the Alps, they will have to face two obstacles: the natural barrier of the Alps and the robust anticyclone that dominates Italy and Western Europe.
The latest updates confirm that This mass of frozen air will essentially stop at the Alpine borders.without being able to cross them.
However, there will be some consequences: Between Thursday, December 21 and Friday, December 22, the intensification of the strong Mistral winds is expected.. In particular, Thursday December 21 will strengthen significantly around Sardinia and in the Tyrrhenian Sea, while in the border Alps there are abundant snowfall above 7-900 meters above sea level.
Friday December 22The interaction between the vortex and the Alps will cause powerful, warm and dry autumn winds, that is, the Alpine Föhnthat will reach the Po Valley and cause a notable increasealthough temporary, of daytime temperaturesespecially in Piedmont and Lombardy, but also with effects in Emilia and Veneto.
For the rest of Italy, no significant changes are expected, except for some notes of instability in the lower Tyrrhenian region, which will cause a greater presence of clouds, but in a generally dry context. Only in the northeastern sectors of Sicily and in the low Tyrrhenian Sea of Calabria could isolated rainfall occur.
He spoke about this and other topics. Lorenzo Tedicisite meteorologist www.iLMeteo.itto what we ask we ask Forecasts for Christmas and beyond.
A warm Christmas is confirmed and, unfortunately, the dream of many children, and not only of a ‘white Christmas’ also for this year, after the hot winter of 2022, has been cancelled; However, I warn that an extreme situation is looming, especially beyond the Alps and in the heart of the continent. In fact, the situation in the coming days will be very dynamic in Europe, while in Italy the weather will remain mostly sunny and dry until at least December 28.
What will happen in Europe?
Two titans, two meteorological monsters, will clash in the Old Continent: a Polar Cyclone will fight against the Azores Anticyclone with pressure changes and extremely violent winds.
Starting tomorrow, in fact, a cyclone full of frozen air will plunge from the North Pole towards Germany with a very low pressure, about 960 hPa, equivalent to that of a category 3 hurricane, that is, a major hurricane! !
A hurricane in Europe?
Absolutely not, but we will have hurricane force winds; In fact, in addition to the polar cyclone over Germany, a very strong anticyclone from the Azores will prevail over Western Europe with an exceptional pressure of almost 1040 hPa on the Portuguese coasts: well, we will have around 80 hPa of difference between Portugal and Germany. , over a linear distance of only 1900 km!
What will this pressure difference mean?
This extreme difference in pressure (80 hPa) will trigger stormy, hurricane-force winds from Scandinavia towards Germany, to Austria, and then flow towards the areas of the Balkans but also affecting Italy.
Will the storm also reach Italy?
Unfortunately yes: on Friday our country will be affected by a strong northwest wind storm in at least three areas: in Sardinia, in the Alps and locally also in the Po Valley with very strong Foehn winds. It will be fast but very intense.
What will the weather be like until Christmas?
Let’s go in order. On Wednesday, light cloudiness will cross Italy without bringing precipitation (except for some showers in the extreme south), but favoring a drop in maximum temperatures, which in the last 3 days had reached decidedly anomalous levels, with worrying heat even in the mountains . : 12 -13°C even at 2000 meters above sea level!
On Thursday, with the clash between the polar cyclone and the Azores anticyclone in the heart of the continent, great “weather chaos” is expected in the Alps, with stormy winds and heavy rains; Over Italy we will begin to feel that the wind intensifies, but in general the day will be quite calm and sunny.
On Friday, on the occasion of the winter solstice (which this year falls on Friday, December 22 at 4:27 a.m.), we will also have chaos here, with the northwest wind storm that will hit Sardinia, the Alps and the plains of the Po Valley . (especially Lombardy with reinforcements from Foehn to Milan).
Will the wind die down from the weekend?
Yes, from Saturday the wind will continue to blow strongly, but it will weaken and rotate from the west-southwest: this rotation will cause an increase in clouds on the Tyrrhenian side, with drizzle not excluded in Tuscany and Calabria, in a grayer context above all . from Christmas Eve onwards. In other places the situation will be discreet and relatively mild.
What awaits us on December 25?
The sky will be partly cloudy on the western slope, from eastern Liguria to Calabria, passing through Tuscany, Lazio and Campania; Some thickening is also expected in the Triveneto and locally in Ionian Sicily; In the rest, we will find a dry and sunny climate with maximum temperatures well above 10-15°C.
Even this Christmas will not have much winter in store for us from a meteorological point of view: we will have to look at the calendar on our mobile phone to understand that it is December 25 and not April 25.