Looks like that has been an error with the algorithm (most likely caused by radar aliasing). Values above 16 km are very, very rare for supercells in Germany and 17.3 km for the meso (with 18 dBZ Echo Top at 12.4 km) looks like an error to me.
However, very strong supercell with a powerful updraft and a huge mesocyclone. Thanks for sharing.
However, very strong supercell with a powerful updraft and a huge mesocyclone. Thanks for sharing.