contents
On Thursday afternoon and evening, strong thunderstorms caused 5 cm hail, squalls and heavy rain.
Thursday lives up to its name. As early as mid-afternoon, a strong thunderstorm moved from the Ajoie in the direction of Basel and, in addition to large hailstones, also caused gusts of wind up to 93 km/h and a lot of rain in a short time. Shortly after 5 p.m. a super cell followed in the Burgdorf/BE area, from which hail of about 5 cm fell. As a result, there was also heavy thunderstorm rain elsewhere.
big hail
In the canton of Bern in particular, especially in the Burgdorf area, it hailed heavily with hailstones the size of Fünflieber.
heavy rain
Locally there was more than 20 mm of rain in 10 minutes, according to the building insurance this is usually too much rain for the sewage system, local flooding must be expected.
In Kiesen/BE there was even more than 30 mm of rain in 20 minutes, in Jona/SG even around 34 mm.
Lots of lightning
Since Thursday noon, more than 21,000 lightning strikes have been registered in Switzerland (as of 10:30 p.m.).
Still thundery
On the front of an approaching cold front, thunderstorms will remain during the night. On Friday, the cold front will pass over us and cause large amounts of rain in some areas, especially in the Alps. More severe thunderstorms are possible on Friday morning, especially on the south side of the Alps.