What does the prefix "alto" signify when classifying clouds?

The prefix "alto" is derived from Latin, meaning "high." When used in the context of cloud classification, it specifically refers to clouds that form in the middle altitude range, typically between about 2,000 and 6,000 meters (6,500 to 20,000 feet) above sea level. Examples of these cloud types include altostratus and altocumulus, which distinguish themselves from other clouds based on their altitude.

Understanding the designation of cloud types is crucial in meteorology because it helps in identifying the likely weather conditions associated with them. The middle altitude clouds often indicate changes in atmospheric pressure and moisture levels, which can lead to various weather phenomena. Thus, recognizing "alto" clouds provides valuable insight into current and impending weather patterns.