Lucrezia Ciotti Il Maltempo is affecting the Lombardia with a phase of strong atmospheric instability, characterised by intense thunderstorms and hailConditions remain variable and may lead to locally violent phenomena, with heavy rainfall and rapid changes in the weather.
Marked weather instability in the Como area and Lombardy
As predicted by the Civil Protection warnings, the Como area is experiencing a phase of marked atmospheric instability.
Already during the night they registered showers Scattered, sometimes very intense, showers have affected the province in an irregular manner. The evolution remains very dynamic, alternating between brief dry spells and new thunderstorms. Particular attention is being paid to the possible formation, in the evening, of a "squall line," i.e., a organized and compact storm system moving rapidly from west to east.
This type of structure can generate severe phenomena such as sudden downpours, intense electrical activity, small to medium-sized hail, and even very strong wind gusts. Estimates indicate rainfall accumulations locally ranging between 70 and 100 millimeters, with even higher amounts in some areas and very uneven distribution.
The unstable situation doesn't just affect the Como area: even on a regional scale, Lombardy is affected by a depression fueled by humid Atlantic air.
Precipitation is widespread over much of the territory, with snow on the Alpine reliefs e pre-alpine beyond 1800–2000 metersYellow alerts have been activated for thunderstorms and hydrogeological risk in the Milan hydraulic hub, with particular attention to the Seveso and Lambro rivers.
Severe weather, Lombardy hit by intense hailstorms: hailstones as large as walnuts and flooding.
The worsening of the afternoon has already produced significant effects on the territorio, with intense episodes of hail and rain concentrated in short intervals of time. various areas of the province of Como, in particular between Cermenate, Lomazzo and Cantù (including Cantù Asnago), have registered ice accumulations The snow covered roads and surfaces, creating a winter-like landscape. On the Giovi state road, images show stretches completely covered in white after the storms.
In addition to the hail, the rainfall caused the first flooding, especially in the lower Como area, with inevitable repercussions on traffic: slow traffic, reduced visibility and slippery road surface In several places. In the afternoon, a particularly active storm line crossed the upper Lombardy plain, directly affecting the Varese, Como, and Lecco areas, with rapid accumulations of up to 40–50 millimeters and peaks locally exceeding 60 millimeters, sufficient to generate hydraulic problems and flash flooding.
A disaster occurred in Rovello Porro violent hailstorm with grains even comparable in size to small walnuts, accompanied by strong winds and intense electrical activity. The storm system, slowly moving from west to east, repeatedly struck the same areas, amplifying the effects on the ground. Further showers remain possible in the next few hours, with a gradual exhaustion of the phenomena between the evening and the night, without excluding new locally intense phases.