part of has part has quality has member composed primarily of object aggregate liquid water water droplet stratus cloud A cloud which 1) occurs in the form of a layer with a fairly uniform base or, less frequently, ragged patches, 2) is composed of small water droplets, 3) is located in the low level of the atmosphere (low étage). envoAtmo St Stratus-Wolke niedere Schichtwolke When well-illuminated by sunlight (excluding during sunrise and sunset) stratus appears grey in colour. Stratus clouds only produce halo phenomena at very low temperatures. Stratus can have weak falls of drizzle, snow or snow grains. Stratus may allow a clearly visible outline of the local star to be seen through its mass. envoCloudAtlas water-based cloud mass of liquid low atmospheric level cloud base invariant decreased size fringed