I did read a stidu, probably linked in a thread here, that analysed pilot behaviour around weather, and found while pilots almost always deviate at altitude, they will quite often fly through the same red radar returns if they're lower down on approach/landing in particular.
There was a study once, from memory I think it was analysing aircraft movements around storms in the vicinity of an airport in the USA on 4/5 different days when storm systems came through. I will see if I can find it later and post a link.