If this relates to the significant area that moved north along a Stuttgart Amsterdam line last week, I flew through/over/round that. I guess you could ask your company to give you surface charts which should have surface fronts on, but from the shapes/line of the cells that I saw it looked like an upper trough and I'm not sure how you get sight of those? Some of the highest tops I have seen for a while here - estimated 42k+ on 30/5.