Late Thursday afternoon, a super cell in the canton of Bern caused a lot of hail. A strong line of thunderstorms then moved through north-western Switzerland and the Mittelland and brought hail, squalls, large amounts of rain in a short period of time and more than 21,000 lightning bolts.
On Thursday at around 5 p.m., a so-called super cell northwest of Thun caused very large hail. The thunderstorm moved from the Wattenwil and Serigen region via the Aare valley into the Emmental, where it weakened again. The hailstones had a diameter of around 4 cm.
Hailstorm with a super cell in the canton of Bern
Gust front ahead of the thunderstorm
The thunderstorm line caused large differences in air pressure. As a result, a gust front swept through the Mittelland even before the thunderstorms, bringing gusts of wind and even a hurricane in Koppigen/BE.
The thunderstorm gusts also affect air traffic. At times, planes were no longer able to land or take off at Zurich Airport. There was also a report from the city of Zurich of a fallen scaffolding.
Large amounts of rain in a short time
Lots of lightning
By 10:30 p.m., more than 21,000 flashes were counted.
At 10:30 p.m. the worst was over
Shortly after 10 p.m., the thunderstorm line moved across the Lake Constance region to Germany. More showers will follow in places on Friday night. Severe thunderstorms are to be expected again on Friday, especially in the afternoon.