The MALTEMPO ready to go wild again: SNOW coming to the Alps at low altitudes

SITUATION: a deep depression vortex is also about to embrace part of our country, especially the north and the center, resulting in a serious deterioration, which will intervene especially from the evening. Meanwhile, conditions of instability induced by a secondary cloudy body are active on the middle and lower Tyrrhenian. Here is the baric map scheduled for tonight at 19 according to the American model, note the flow from the south at high altitude and from east to the ground in Valpadana:

CONSEQUENCES: heavy rainfall expected in the north and center and also some maritime storms between the high Tyrrhenian and the Ligurian Sea, but above all heavy snowfalls along the Alps, with a very dense snow level, which will be affected both by the sirocco flows returning from the south and of cold drafts arriving from the west. This will take you from the snow to the western hills and the Alpine valleys above 900-1100m in the central eastern pre-alpine areas; but also on these areas the convective nature of the phenomena and the reversal of the cold air downwards could lower this limit much lower.

EVOLUTION: Friday, even after the frontal passage, the weather will remain unstable in the north and in the center with the risk of further rainfall, sometimes even involving Campania, on the margins the rest of the south and partly downwind, that is in precipitous shade, the Abruzzo. Here we see the sequence of the passage with the precipitative map relative to the accumulations expected between 18.00 today and Friday dawn and then for the following 12 hours:

WEEKEND: Saturday a new front will invest the central regions, at the same time another low-pressure vortex on the ground will creep into the disturbed flow going to extend the phenomenology in the north again from night to Sunday and for the next 24-36 hours, which will see heavy rains between north, central and Campania, much milder or absent on the rest of the south. Other snow is arriving in the Alps at altitudes even lower than 800m.

NEXT WEEK: Still very unstable beginning with rains between north and center Monday, Tuesday in the center and south, Wednesday and Thursday morning still between north and Tuscany due to the persistence of an unstable flow from the south west, although progressively milder. To verify a possible IMPROVEMENT from Friday 22 November, follow the updates.

TODAY: in the northwest irregular, increasing cloudiness, associated with the first rainfall during the day, snow in the Alps over 600-900m, in the evening even at lower altitudes on Piedmont and Valle d'Aosta, thunderstorms always in the evening on the Ligurian Gulf . At the north-east firstly good weather, then rising clouds and early rainfall in the evening. Reinforcement of winds from east to north in the plains, from the south in the valleys and on the coasts, Dark Tramontana in Liguria. At the center irregular cloudiness and some showers possible in the morning on southern Sardinia and Lazio, then clouds arriving also on Tuscany and from the evening possible precipitations on all the Tyrrhenian side, Umbria and Sardinia, more sun in the morning on the middle Adriatic, then partial cloudiness. Reinforcement of southern winds. To the south, clouds over Campania, Calabria and Sicily with the risk of showers, especially in Campania, which varies on the southern part with some local phenomenon but in a favorable context to sunny spells. Falling temperatures in the maximum values ​​in the north-west.

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