What does general visibility in weather reports refer to?

General visibility in weather reports refers to the least distance visible from the observer. This measure is crucial for various applications, including aviation, where knowing the minimum visibility ensures that pilots can operate aircraft safely. When weather reports state general visibility, they provide information on how far an observer can clearly see in the prevailing weather conditions, which is vital for making decisions about travel, safety, and operations in environments impacted by fog, rain, or other obstructions.

By focusing on the least visible distance, the information helps to understand the worst-case scenario regarding visibility, which is essential for determining whether conditions are safe for activities such as flying or driving. This concept is particularly significant because it can dictate operational decisions and safety protocols in adverse weather situations.