What type of clouds are commonly associated with a cold front during passage?

Cumulonimbus clouds are commonly associated with a cold front during its passage. These clouds are characterized by their towering, vertically-developed structure, which indicates strong upward air movements typically present when a cold front approaches. As the cold air mass collides with the warmer, moist air ahead of the front, it forces the warm air to rise rapidly. This rapid ascent leads to the development of cumulonimbus clouds, which can produce severe weather phenomena such as thunderstorms, heavy precipitation, and sometimes even tornadoes.

The presence of these clouds signifies unstable atmospheric conditions that often accompany the strong lifting action associated with cold fronts. Thus, recognizing cumulonimbus clouds in the context of a cold front is crucial for understanding weather patterns and predicting potential hazardous weather conditions.