Well when you have a cold front pass through they bring rain and clouds because it sucks up moisture which condenses into clouds then eventually if it has enough energy and sucks up enough moisture will produce rain. Warm fronts do just about the same thing except that instead of cooling off it bring warm humid air and meets up with the cool air already in place then forms clouds and rain. Low pressure brings moist air up from the south and forms clouds and rain. High pressure usually does not have an clouds or rain with it high pressure brings sunny skies sometimes you get what they call a "dirty high pressure" which means it has clouds associated with it but, that does not happen too often.
Clouds occur along the frontal surface because at fronts between air masses of different temperatures, the warmer air, being less dense, is forced to rise. This results in the unstable conditions that are characteristic of fronts and that produce much of the precipitation and stormy weather of the contiguous US. In simpler terms; clouds and precipitation occur because warm air rises, expands, and cools which results in unstable weather conditions. Hope that helps!
warm
Cumulonimbus clouds can develop along warm fronts, but are more common along cold fronts.
The fronts usually bring an air different from what is at the place where the front is moving. Therefore, since warm and moist air is lighter than the cooler and dryer air, the dryer air of the two fronts pushes the moist air above and it forms clouds. Once the clouds become too heavy, it rains.
cold fronts
Cumuliform clouds typically form along or ahead of a cold front. Most cloudiness and precipitation associated with a cold front occur as a relatively narrow band along or just ahead of where the front intersects Earth's surface.
Clouds occur along the frontal surface because at fronts between air masses of different temperatures, the warmer air, being less dense, is forced to rise. This results in the unstable conditions that are characteristic of fronts and that produce much of the precipitation and stormy weather of the contiguous US. In simpler terms; clouds and precipitation occur because warm air rises, expands, and cools which results in unstable weather conditions. Hope that helps!
Precipitation!
Cold fronts
Thunderstorms
cold fronts bring sever weather when the temperature differance between the cold air and the warm air cold fronts usally produce thunderstorms with heavy precipitation after a warm front passes it is warm
warm
Cumulonimbus clouds can develop along warm fronts, but are more common along cold fronts.
The most prominent process along a cold front is condensation, which results in clouds and precipitation.
The fronts usually bring an air different from what is at the place where the front is moving. Therefore, since warm and moist air is lighter than the cooler and dryer air, the dryer air of the two fronts pushes the moist air above and it forms clouds. Once the clouds become too heavy, it rains.
cold fronts
precipitation