WEATHER UNTIL DECEMBER 13, 2024, ANALYSIS AND FORECAST
The depression that has influenced the weather in the South in recent days is moving away, while a new front has approached the Alps with snowfalls on the borders, but little else in the rest of Italy apart from predominantly sterile cloudiness.
What is now flowing over Italy is not particularly cold air like the one that will break in on Sunday, December 8, linked to a new vortex now over the United Kingdom. This deep cyclone is linked to a North Atlantic trough supported by a descent of polar and Arctic cold air. The cold front will come into play right between Saturday and Sunday, causing an energetic wave of bad weather.
The descent of cold currents over more than half of Europe will be triggered by the northward expansion of the Azores High towards Iceland. The polar cyclone will fully target Italy during Sunday, where it will join a secondary depression that will form earlier. Winter is therefore ready to manifest with this stormy circulation, which will position its core over our regions, also favoring windstorms and heavy thunderstorms.
We will have fully winter-like bad weather. Considering the sharp cooling associated with very cold air at high altitudes, we expect snow down to very low or hilly altitudes initially in the North, especially on the Eastern Alps and the Emilian Apennines, and then in the central regions where instability will be more pronounced.
In the South, it will snow at higher altitudes down to the low mountains.
This winter phase will also accompany us into the next week.
IN DETAIL
Saturday, December 7: rapid deterioration starting from the North with rain in the plains, except for the extreme North-West, and snow in the Alps, which will descend to low altitudes by evening.
In the afternoon/evening, rain and thunderstorms will break out in Tuscany, Lazio, and Sardinia.
Winds strengthening. Sunday, December 8: overcast skies in the North-East, with rain and snow in the hills gradually easing. Marked instability in the Center-South, with snow down to 1,968-2,297 feet in the Apennines. Monday, December 9: widespread instability in the Center-South and residual between Emilia Romagna and Veneto. Further weather trends: the cold depression will evolve into a Mediterranean cyclone but will tend to move westward.
Temperatures will slowly rise by a few degrees with the cold easing starting from the Center-South.
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