A stationary front is a weather pattern that occurs when two air masses meet but neither is strong enough to replace the other. This results in a boundary that can remain in place for an extended period, often leading to prolonged periods of cloudy weather and precipitation. The air masses involved are typically different in temperature and humidity, which can create various weather conditions along the front. Stationary fronts can produce significant weather events, such as rain, snow, or fog, depending on the characteristics of the air masses. Over time, if one air mass gains strength, the stationary front may evolve into a cold front or a warm front, leading to changes in weather patterns.