What does the METAR code BKN represent?

The METAR code BKN stands for "broken clouds," which refers to a significant amount of cloud cover where the clouds cover between 5/8 and 7/8 of the sky. This designation indicates that while clouds are present, there are still areas of the sky that remain clear. Understanding this code is important for pilots and meteorologists, as it provides critical information about ceiling height and visibility conditions, which are essential for flight operations.

In contrast, partially cloudy skies would imply a lesser coverage than what "broken" suggests, typically indicating cloud coverage that is less than 5/8. Overcast conditions, on the other hand, indicate a sky that is fully covered with clouds (8/8), and clear skies would denote no significant cloud cover at all. Hence, the association of BKN specifically with "broken clouds" is accurate and reflects a clear definition within the METAR reporting system.