For what you said, summer it's just beginning, but actually I really had no idea that tornadoes and big storm were formed in finland, well, I don't know if it's because in the equatorial climate we only have 2, fresh and hot stations, but I really dig for that climatic roller coaster going on in the north.
Oh no, they are nothing like the huge tornadoes commonplace in the south of the USA that you, too, must have seen on the news on TV. They are short-lived and local but powerful enough to take down a local power line, cause trees to fall in the space of a hectare or two or destroy a single building a a group of buildings.
https://tinyurl.com/ybwgjf42
That link leads to a translation to a Finnish language page that describes the destruction wrought by these small tornadoes in addition to storms.
Use text search for "trombi".
For example, in Tornio in southern Lapland on June 14 2004, a 20 metre wide hall was lifted by a tromb and moved five metres. There was a tractor inside. After the passing of the tornado, the tractor stood outside the hall. The hall had been removed from around the tractor and the hall had landed beside the tractor now sitting under the open sky.