What happens when two different air masses meet they from a boundary that separates the two air masses?

When two different air masses meet, they create a boundary known as a front. This front can lead to various weather phenomena, such as precipitation, clouds, and changes in temperature and wind direction, depending on the characteristics of the air masses involved. The denser air mass often pushes the lighter one upward, leading to instability and potential storm development. The type of front formed (cold, warm, stationary, or occluded) influences the resulting weather patterns.