What altitude range do alto clouds typically occupy?

Alto clouds are typically found at mid-level altitudes, which range from approximately 6,500 feet to 20,000 feet above sea level. This altitude range is defined by the fact that alto clouds are formed in a specific part of the atmosphere where the temperature and moisture conditions are conducive to their development.

These clouds usually indicate more stable atmospheric conditions and can often produce light precipitation and are characterized by their layered appearance. Examples include altostratus and altocumulus clouds. The mid-altitude classification is a crucial factor in understanding weather patterns and their potential impact on local conditions, as these clouds can influence visibility and precipitation.

In contrast, the other options refer to altitudes that do not align with the characteristics and formations of alto clouds. Therefore, the selection of the range between 6,500 feet and 20,000 feet accurately reflects the typical altitude where these clouds are found.