Both, really. But they are best developed in the area of the front itself because that is typically where the greatest lift is. Ahead of the front, there is more instability so you tend to get smaller cumuloform clouds. Behind it, clouds usually move out fairly rapidly as the atmosphere quickly stabilizes, removing the lift.
Refer to my link for a diagram of this.
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.
Not always. Although many cumulnimbus clouds are associated with cold fronts, some form along dry lines or, lest often, warm fronts. Some form without any sort of front or organized weather system.
Cirrus clouds arrive before other clouds as a warm front approaches because the are the leading edge of the front. They typically form as the warm front approaches a cold front or stationary boundary.
Thunderstorms form when a cold front hits a warm front, and the resulting effect creates thunderstorms (Big, dark clouds that produce thunder, lightning, rain, hail, and tornados O.o)
cold and dense
They form from behind the moving cold front because the warm air condenses quickly producing clouds, rain, and stormy weather.
cumulus clouds
They don't form one, but they signal an oncoming cold front.
well clouds often form after a cold front because it is the right weather for a rainy cloud
Cb or cumulonimbus clouds form at the cold font associated with heavy showers, followed by cumulus (Cu) clouds. A cold front forms when a more dense, warm air mass over a departing cold air mass
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 form along fronts when there is some type of uplift of air. For example in a warm front, there is cool air ahead of the front and so the warm air rides up the back side of the cool air kinda like a giant ramp and condensation first occurs at high altitudes causing the formation of cirrus clouds and any type of cirro form clouds. Cirro form clouds are mainly composed of ice crystals since they occur at such high altitudes. Another example of cloud formation with fronts is with a cold front. With a cold front there is vertical uplift of warm moist air up and over a cold air mass causing rapid condensation and the formation of cumulonimbus clouds which are essentially thunderstorm clouds.
Altocumulus clouds from an updraft or convection from an unstable upper layer. This is generally in advance of a weather change like a cold front.
Clouds form along fronts when there is some type of uplift of air. For example in a warm front, there is cool air ahead of the front and so the warm air rides up the back side of the cool air kinda like a giant ramp and condensation first occurs at high altitudes causing the formation of cirrus clouds and any type of cirro form clouds. Cirro form clouds are mainly composed of ice crystals since they occur at such high altitudes. Another example of cloud formation with fronts is with a cold front. With a cold front there is vertical uplift of warm moist air up and over a cold air mass causing rapid condensation and the formation of cumulonimbus clouds which are essentially thunderstorm clouds.
Not always. Although many cumulnimbus clouds are associated with cold fronts, some form along dry lines or, lest often, warm fronts. Some form without any sort of front or organized weather system.
Cirrus clouds arrive before other clouds as a warm front approaches because the are the leading edge of the front. They typically form as the warm front approaches a cold front or stationary boundary.
A cold front.