What I want to know is how the RAF and USAAF mission planners got the Germans to tell them the air temperatures over Berlin ?
By about 1943 Bomber Command were updating the met obs & forecasts in real-time based on information relayed from nominated aircraft in the bomber streams and transmitting the revised data back to the same streams by HF.
I remember this being mentioned in 'The Other Battle' and from memory it was Main Force, not just Pathfinders, that modified their approaches based on the revised data. Sort of like an early, analogue, machine-learning algorithm...