Storms, high winds and "abundant" snowfall are forecast in the coming days, with the wave of bad weather dubbed the 'Immaculate Storm' by Italian media as it is set to hit on the day of the Festa dell'Immacolata Concezione or L'Immacolata, the Feast of the Immaculate Conception.
Cold air masses will arrive from the icy north of Europe from Wednesday December 8th onwards, according to weather reports from Il Meteo.
Snow is expected to fall first on low ground in the north, in the regions of Piedmont, Lombardy, Liguria and Veneto, Il Meteo's director Antonio Sanò told the Ansa news agency.
He also predicted "intense southerly winds which will worsen conditions over Sardinia, Tuscany, Lazio and Campania."
READ ALSO: Ten phrases to talk about cold and wet weather like a true Italian
Hitting the Alps, the cold air will enter Italy mainly through what weather reports refer to as a Porta della Bora, or a 'door of the Bora'. This is a name used in Italian weather reports to describe an 'entry point' through which cold air currents pass to reach Italy.
At the moment Wednesday's forecast says this will be through the Po Valley in the north-east of the country, causing a general drop in temperatures throughout the surrounding regions.
The wave of cold, blustery winter weather won't just hit on Wednesday, but will continue throughout the whole week, Sanò said, with the storm moving south.
"In the following days a cyclonic vortex fed by very cold air will form over the lower Tyrrhenian, sparking a phase of bad weather in the centre and south where snow will fall as well as driving rain."
"The weather will get better in the north, but it will be very cold. In Milan, because of snow on the ground, Thursday and Friday will be days of frost and ice with temperatures below zero during the day too," he added.
READ ALSO: From Venice to Mont Blanc, how is the climate crisis affecting Italy?
Snow has already been reported in Valpadana, an area of valley referring to the Po river basin in the north of Italy. Milan is also expected to experience a snow dump of 15-20 cm.
Given the very cold temperatures, especially in the northwest, snow is also expected to cover nearby cities including Cuneo, Turin, Genoa, Varese, Como, Bergamo, Brescia, Pavia and Piacenza.
Snowfall at very low altitudes forecast in western parts of the Veneto region too, such as in Verona and Vicenza and in the plains of Padua. More snow could continue to fall until the early hours of Thursday 9th in the north-east.
"Widespread nighttime frost will affect all northern regions and the interior areas of the centre," confirmed Sanò.
Meanwhile, Italy's Department of Civil Protection has issued rain and thunderstorm warnings from Tuesday December 7th.
? Martedì #7dicembre
— Dipartimento Protezione Civile (@DPCgov) December 6, 2021
⛈? Ancora temporali in Sicilia, venti di burrasca e mareggiate anche in Puglia, Basilicata e Calabria
?? Allerta gialla in 3 regioni
Leggi l’avviso di condizioni meteorologiche avverse del #6dicembre ?https://t.co/0FFjmBIwJM#protezionecivile pic.twitter.com/H453BkIb6I
Parts of southern Italy, including Calabria, Basilicata and most of Sicily, have been placed under a yellow alert for localised heavy and potentially dangerous rainfall.
The department is responsible for predicting, preventing and managing emergency events across the country, and uses a green, yellow, orange and red graded colour coding system for weather safety reports.
Glossary
La Bora - This is the name given to a gusty wind that moves downwards. It's a cold current and remains crisp despite flowing down to warmer temperatures compared to the summit. The term is derived from 'Borea', the personification of the north wind for the Ancient Greeks.
Porta della Bora - The so-called 'door of the Bora' is an entrance through which this cold current passes to reach Italy. There are a few such entrances described by weather forecasters. Depending on where the wind passes through, some areas will be more affected by rain or snow. The main gateway, however, is Postojna in Slovenia, near the Alps of Friuli Venezia Giulia.
La burrasca - A gale, a strong wind. According to the international Beaufort scale, this type of wind is characterised by a speed of between 15.3 and 25.1 metres per second, and distinguished as moderate, strong or very strong, depending on the speed. In everyday usage, you might hear this said in reference to a sea storm. 'Una burrasca improvvisa ha sconvolto le tranquille onde del mare!' - A sudden gale disrupted the calm waves of the sea!
Nevicare - to snow
Il temporale/La tempesta - the storm
Ventoso - windy
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