some explanation for the situation: because of the low over northwest africa (which is going to move to the northeast) there's hot air from sahara being pumped over the mediterranean into eastern europe
this hot, now also moist air means favourable conditions for storm formation during the day
meanwhile, the situation in western europe is different, with much colder air, the two clashing
where there's temperature gradient, because cold air is denser, there is also a difference in how pressure field looks at ground level and higher up – this is called the thermal wind
this means that rising air will not rise straight, but will be pushed into a spinning column of air, and the storm that forms will have the structure of a mesocyclone; there's a persistent vortex within the storm, and the storm has well-defined leading and trailing sides
such storms, because of their spin, can generate tornadoes
also, if you compare the weather conditions with the favourable tornado alley conditions, it's actually quite similar; but because of vast north-south plains in north america and the rocky mountans range to the west which causes winds to oscillate north-south on the eastern side, the mechanism is amplified there.