Officer Aptitude Rating (OAR) PracticeTest

Stratus clouds are typically low-altitude clouds that form in uniform layers and can cover the sky in a gray overcast. The altitude of stratus clouds is generally measured at heights below approximately 6,500 feet (2,000 meters), with most stratus clouds forming at altitudes between 600 to 4,000 feet.

The reason why 6,000 feet is the most relevant answer in the context of this question is that it represents a threshold commonly used in meteorology to define the upper limits of what is classified as a stratus cloud. Clouds that exist above this altitude, especially those forming higher than 6,000 feet, would typically belong to other cloud types, such as altostratus or cirrostratus.

Understanding the altitude range of stratus clouds is essential since it informs pilots and meteorologists about potential weather conditions, such as low visibility or overcast skies, impacting aviation and safety decisions.