TREND 29 APRIL – 6 MAY 2024
After the cold phase that characterized the second half of April, rain returned to the plains and snowfall in the mountains, accompanied by an overall normal snow level for the period between 1500 and 2000 but depending on the valleys. During the next few days the bad weather will continue to persist in the north-west, thanks to the persistence of a disturbed circulation positioned to the west of the Alps: a calmer start to the week will be followed by a second highly disturbed part, in particular from May 1st, unfortunately going to negatively affect the bridge.
Let’s go in order, however: Monday 29 April will be a day of transition as mentioned, with increasingly wider clearings and generally absent precipitation in the north-west, except for residual phenomena between Valle d’Aosta and VCO; temperatures will also undergo a sharp increase, exceeding 20°C again in the plains, while in the mountains the freezing point will even reach 2700-2800 m. From Tuesday, however, conditions will gradually worsen again, due to the approach of a new disturbed circulation from the west. Grayer skies again from the afternoon/evening and first precipitations especially in the northern Alps between Vda and Ossola, awaiting a new intense worsening from Wednesday.
The cards for Wednesday and Thursday are those of the great disturbed passages of the past, driven by sirocco winds: already on Wednesday the phenomena will become more widespread, in particular in the Alps, with a progressively decreasing snow level at 2000 m, after 2200- 2300 m in recent days. The peak of the bad weather will probably be reached on Thursday, with intense rain across Piedmont and Valle d’Aosta, together with heavy snowfall from 2000 m in the Alps. Local convective phenomena cannot be ruled out, especially close to the Alps. Looking at the maps, the most affected areas will be those between Canavese, Biellese, eastern and southern Valle d’Aosta, obviously passing through the VCO. In these areas, total accumulations could reach 200-300 mm in the most exposed areas, with significant snow accumulations, especially from 2500 m, where even 100-150 cm of wet snow could fall.
In general it will be a disturbed passage well distributed across the entire north-west and capable of also affecting the plains. The bad weather could also affect Friday 3 May, albeit gradually easing, while several doubts still remain about the next weekend, when conditions could be rather variable, especially in the mountains.
