The weather conditions worsen and in Palermo the orange alert was triggered. The regional civil protection has issued a warning for weather-hydrogeological and hydraulic risk valid until midnight today: thunderstorms forecast; tomorrow, however, a slight improvement with the warning that from orange to yellow.
According to the forecasts of the experts of 3bmeteo.com, a large depression circulation – gradually moving from the Ionian to the Balkans – repeatedly renews conditions of marked winter instability in Sicily. Clouds at times compact, with local thunderstorms and punctual hailstorms will intermittently affect the region even in the first part of tomorrow, showing themselves more insistent in particular along the Tyrrhenian slopes of the provinces of Palermo and Messina; more marginal the involvement of the hinterland of Catania, of Syracuse and of the Agrigento coast, where the day will pass under the banner of frequent alternation between large sunny spaces, rapid cloud coverings and short passing rain showers.
The disturbance will be fueled by the influx of cold currents from Northern Europe, heralds of a further drop in temperature and snowfall starting at 900/1100 meters above sea level on Sicani, Madonie, Nebrodi and Etna. In the next few hours, moreover, our island will be lashed by strong gusts of Mistral, close to or above 50-70 km / h, which will feed storm surges along the exposed coastal stretches of Trapani, Palermo and western Messina.
Between the afternoon and the evening hours on Tuesday, the disturbance will leave room for a progressive improvement in weather conditions. As announced by the meteorologist Andrea Bonina of 3bmeteo.com, the feast of the Immaculate Conception will benefit from ample sunshine and a few clouds scattered over most of Sicily; after a harsh night, the entry of milder winds from the southern quadrants will also favor a appreciable increase in maximum temperatures, which will return to cross the threshold of 19 ° C in Palermo, 18 ° C in Syracuse, 17 ° C in Catania and 15-16 ° C in Agrigento and Messina.
In the absence of the anticyclone, the stable and sunny pause will however prove to be only a short parenthesis. On the basis of the latest calculations by 3bmeteo.com, in the second part of the week new cold and unstable impulses from the North Atlantic will peep out over the Mediterranean basin, bringing rains, sustained winds and a new drop in temperatures also in Sicily. Associated with a new cyclogenesis on the Tyrrhenian, starting from Thursday 9 December the humid western currents will bring more abundant and frequent rainfall on the provinces of Trapani, Agrigento, Palermo and Caltanissetta and on part of the Ragusa area. New snowfalls are expected on the main mountain areas, including the localities of Piano Battaglia, Monte Soro, Floresta, Piano Provenzana and Rifugio Sapienza.