What is a key feature of cold front thunderstorms?

Cold front thunderstorms are characterized by their development along the leading edge of a cold air mass advancing into a warmer air mass. One key feature is that clouds often dissipate after the storm has moved through. This occurs because, as the cold front advances, the colder, denser air undercuts the warmer air ahead of it, leading to turbulence, lift, and ultimately storm development. Once the front passes, the conditions typically stabilize, allowing clear skies to return and causing the clouds associated with the thunderstorms to dissipate.

The other options do not accurately describe this type of thunderstorm. These storms can develop at various times, not limited to the morning. Clouds usually form in isolated or fragmented clusters rather than solid lines. Lastly, cold front thunderstorms typically arise from a clash between cold and warm air masses, leading to decreased temperatures rather than high temperatures.