How is cloud height reported in METARs?

In METARs, cloud height is reported in hundreds of feet above ground level. This method of reporting allows for a standardization that simplifies communication among pilots, meteorologists, and air traffic controllers regarding cloud ceilings and visibility conditions related to flight operations.

When cloud height is expressed in hundreds of feet, it provides a clear and concise reference for understanding how high clouds are above the ground, which is essential for flight planning and safety. For instance, if a METAR indicates a cloud height of "3," it means the clouds are at 3,000 feet above ground level. This format is particularly useful since it aligns closely with other important altitude references in aviation, such as the altimeter settings and the way airspace is classified.

The other options do not accurately reflect the format used in METARs. Cloud height being reported in feet or meters would not provide the necessary context regarding the height relative to the ground, while stating it as "above ground level" without the quantification in hundreds of feet would not conform to the standard units used in these reports. Thus, the correct understanding of cloud height reporting in METARs is crucial for accurate interpretation and safe flight operations.