Supercell storms form when extreme heat creates thermal energy accumulation in the lower atmosphere, which then collides with cold air masses from northern regions, triggering massive atmospheric instability that produces giant convective storm cells releasing destructive hailstones, high-speed winds, and lightning, causing severe disruption to transportation systems, public infrastructure, and agricultural sectors across affected regions.
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Chaos in Milan, Italy! A Sudden Hailstorm Struck Milan, Damaging Homes and CarsAdded:
Milan was hit by a thunderstorm with heavy rain and hail bringing traffic to a standstill.
The weather warning issued a few hours ago has been heated. Milan is currently experiencing a period of severe severe weather with rain and thunderstorms affecting the city and several surrounding municipalities.
The Civil Protection Department has issued a yellow warning for the risk of thunderstorms in Milan's water system.
Around 7:00 p.m. heavy rain was recorded accompanied by thunder, lightning, and even hail in some areas.
The rainfall caused congestion in traffic centers and along major urban routes. Reduced visibility and the intensity of the rain made travel even more difficult, especially in areas most prone to flooding.
Maximum vigilance is required in areas near tunnels and waterways, with the city urging residents to exercise caution when traveling and engaging in outdoor activities.
Milan's water supply remains on high alert, especially in areas traditionally most vulnerable to severe storms. The situation is being monitored based on rainfall trends.
Meanwhile, elsewhere, a dramatic and destructive extreme weather phenomenon struck the province of Brescia, Lombardy, northern Italy on Thursday afternoon, May 28th, 2026.
After experiencing record-breaking temperatures over the past few days, the region suddenly transformed into a natural battlefield due to a supercell storm that brought massive hailstones, high-speed winds, and lightning.
In just minutes, the previously dry heat wave affected cityscape was covered in a thick white layer of ice resembling winter snow.
This extreme storm caused massive disruption to transportation systems, severe damage to public infrastructure, damaged thousands of vehicles, and paralyzed the agricultural sector in the Padan lowlands.
According to official data released by the local meteorological agency and the Pastori Institute observation station in Viale Bornata, the Brescia region just recorded an extreme temperature record on Wednesday, May 27th, 2026 with the mercury reaching 35.2°C.
This unusual temperature spike for late May has created a massive accumulation of thermal energy in the lower atmosphere.
The extreme heat became the perfect catalyst when a cold air mass from northern Europe began to intrude into the Italian lowlands. This extreme collision between two air masses with contrasting temperatures triggered massive atmospheric instability.
As a result, giant convective storm cells, supercells, formed moving rapidly from the southwest to the northeast, releasing destructive energy in the form of giant hailstones measuring 4 to 5 cm in diameter over Brescia.
This phenomenon drastically lowered air temperatures in an instant, reaching around 23° C.
The hail storm's fury was not uniform, but concentrated in several key corridors within the province. The Bassa Bresciana region, the lowlands south of Brescia, and the coast of Lake Garda became the red zone, experiencing the most devastating impact.
Bassa Bresciana Communities in this region witnessed a terrifying scene as the pitch-black sky suddenly dropped millions of large hailstones.
Towns like Monterone, Urago d'Oglio, Ghedi, and Bagnolo Mella experienced the worst ice accumulation.
Main roads, courtyards, and public areas were covered in a layer of ice several centimeters thick in less than 15 minutes.
In Ghedi, the windstorm broke large tree branches and threw them onto the streets.
Lake Garda region Along the coast, the storm brought downburst winds that triggered high waves on the lake's surface. In the town of Limone sul Garda, water rescue teams from the Riva del Garda Fire Department had to conduct an emergency operation using speedboats after receiving reports of a sailboat that had capsized due to strong winds in front of the Casadela Trota.
Fortunately, two crew members managed to escape to shore on their own before a rescue helicopter arrived.
Connecting road infrastructure, the high intensity of fallen trees forced authorities to completely close the connecting road between Gaity and Monterone for the safety of road users.
A similar closure was also imposed on the route to Borgosatollo, which was later reopened using an emergency opening and closing system, senso unico alternato, after firefighters successfully removed a tree trunk lying across the road.
The most visible impact of the golf ball-sized hail was clearly visible on the transportation sector and private property.
Thousands of vehicles passing through or stranded in open areas became easy targets for the hail falling at high speed from the sky.
The A4 Milan-Venezia Autostrada, particularly the section connecting Brescia to Verona, was reportedly completely paralyzed in several locations.
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