Driving into work today, with high dense cloud cover, my preferred radio station was cut in by another radio station of the same frequency. I recognize the cloud cover acted as a dish, and I typically get static through that particular stretch of road, but what makes my radio decide what frequency is dominant of the two? What would be the effect of being in an intersection of multiple stations?
Cloud cover won’t have any impact of note. If it was an AM radio station then the ionosphere, active and reflecting radio waves, was the culprit. If it was an FM radio station most likely there was an unexpected transmitter problem, reducing its power for some period of time.
In both cases the decision on which to play is the strength of the incoming signal.