High clouds are generally found at an altitude greater than which measurement?

High clouds are typically defined as those that form at altitudes above 20,000 feet Above Ground Level (AGL). This classification includes cloud types such as cirrus, cirrostratus, and cirrocumulus, which can be observed at these lofty heights. Understanding that high clouds exist at these greater elevations is crucial for pilots and meteorologists, as they often indicate specific weather conditions occurring in the upper atmosphere, such as the presence of jet streams or the approach of a warm front.

Clouds found below this threshold are classified as mid-level or low-level clouds, and identifying the altitude characteristic of high clouds is fundamental for assessing weather patterns and phenomena that may affect flight operations. Therefore, identifying that high clouds are present primarily at heights exceeding 20,000 feet AGL is essential for accurately interpreting aviation weather information and making informed decisions based on cloud types and their associated weather implications.