Describe a cold front and its weather.

• A. Cold air advances, causing a sharp temperature drop and heavy, often brief rainfall or thunderstorms.
• B. Warm air slides over cooler air, producing light rain.
• C. Front remains stationary with no change.
• D. Occluded front develops from rising dryness.

Answer: (A)

A cold front is the leading edge of a mass of cold air moving into warmer air. As the cold air wedges beneath the warm air, it forces the warm air to rise rapidly. This quick lifting promotes strong vertical development of clouds, typically producing heavy, intense rainfall or thunderstorms that tend to be brief. You’ll often feel a sharp drop in temperature and may notice gusty winds as the front passes, with cooler, drier air moving in afterward and skies clearing.

This matches the description of cold air advancing, a sharp temperature drop, and heavy, often brief rainfall or thunderstorms. Other fronts behave differently: a warm front features warm air gliding over cooler air and usually yields steadier, lighter rain; a stationary front barely moves and brings more persistent, less dramatic rain; an occluded front forms when a cold front catches up to a warm front, creating a more complex weather pattern.