Cb and Tornado
Emacs thanks for the link,
A0283 thanks or your information,
MrMachfivepointfive for the translation.
Though I had seen in 1982 the original report, after I had left Incident and Accident investigation, I had forgotten the Tornado detail, but remembered the Squall line like frontal system with embedded Cb´s.
But more important is the detail of the extreme high accelerations of +6.8 and -3.2 g. It is a very good indication of the inherent forces in those airstream inside a weather build up.
I know from experience that it is a better approach to the truth by waiting for the investigation results, than starting wild guesses and assumptions. So lets wait and see.