Strong weather phenomena often form near the front. Why?

Frontal is the intersection of cold and warm air masses. Because it appears near the cyclone trough, it is also called frontal cyclone. Because of the different properties of cold air mass and warm air mass, the temperature and pressure at the interface (front) change greatly. What a windy day.

Near the front, the warm air mass will rise along the front. As the altitude rises and the temperature drops, the water vapor in the warm air mass will condense to form clouds. When the air humidity reaches saturation, rain and snow will form. If it rises sharply, it may form a rainstorm.