Fog is defined as a cloud that begins within how many feet of the surface?

Fog is defined as a cloud that forms at a low altitude, specifically within a certain distance from the surface. The correct answer indicates that fog begins within 50 feet of the ground. This classification helps meteorologists and aviation experts to understand the limitations and visibility conditions associated with fog. When fog is present, visibility is often significantly reduced, which can impact transportation, especially air travel.

The distinction of 50 feet is significant in weather reporting, as it provides a clear guideline for distinguishing fog from other types of low-level clouds that may not have the same impact on visibility. Thus, understanding that fog originates within this specific range of elevation is vital for various practical applications in weather forecasting and safety measures.