Lightning in Europe at this time
I don't remember seeing this cited before - but it is a useful site that shows lightning activity and hope that it will add to the background knowledge of this discussion.
lightningmaps .org / blitzortung /europe/index.php?bo_page=archive&bo_map=0&lang=en&bo_year=2019&bo_m onth=05&bo_day=05&bo_hour_from=16&bo_hour_range=4&bo_animati on=1#bo_arch_strikes_maps_form
I probably haven't the rights to post the full URL so split so you can use it with minimal effort - just remove the spaces.