A cloud formation similar to cirro-stratus, but heavier and at a lower level; a stratus cloud at an intermediate altitude of 2 or 3 miles.
A type of cloud that is grey or bluish striated and either fibrous or a uniform sheet producing light drizzle. It is formed at an altitude of approximately 23,000 to 24,000 thousand feet.
An extended cloud formation of bluish or gray sheets or layers.
A principal cloud type, gray in color. Altostratus appear in a sheet or layer with uniform appearance, found anywhere from the 6500 to 20,000 foot level.
These clouds from a bluish or grayish veil that totally or partially covers the sky.
A middle cloud composed of gray or bluish sheets or layers of uniform appearance. In the thinner regions, the sun or moon usually appears dimly visible.
a mid-level cloud which occurs as a sheet or layer with a striated, fibrous, or uniform appearance and is gray or bluish (never white)
Mid-altitude clouds with a flat sheet-like shape.
This middle cloud genus is composed of water droplets, and sometimes ice crystals, In the mid-latitudes, cloud bases are generally found between 15,000 and 20,000 feet. White to gray in color, it can create a fibrous veil or sheet, sometimes obscuring the sun or moon. It is a good indicator of precipitation, as it often precedes a storm system. Virga often falls from these clouds.
Grayish or bluish cloud sheet or layer of stratified, fibrous or uniform appearance, totally or partly covering the sky, and having parts thin enough to reveal the Sun at least vaguely, as through ground glass.
A cloud of a class characterized by a generally uniform gray sheet or layer, lighter in color than nimbostratus and darker than cirrostratus. These clouds are of medium altitude, about 8000 to 20,000 ft (2400-6100 m).