What happends when one air mass pushes another air mass out of the way?

When one air mass pushes another air mass out of the way, it can lead to the formation of a weather front. The boundary where the two air masses meet is called a front, which can be either a warm front or a cold front, depending on the characteristics of the advancing air mass. This interaction often results in changes in weather, such as precipitation, temperature shifts, and shifts in wind patterns as the air masses mix and replace one another.