clouds [3]![click to hear](/images/speaker.jpg)
Fine droplets of water or ice crystal suspended in the atmosphere; the World Meteorological Organization classifies them according to 10 types.
middle clouds ![click to hear](/images/speaker.jpg)
Clouds at an altitude of 6,500 to 20,000 feet and composed of water droplets and ice crystals.
altostratus ![click to hear](/images/speaker.jpg)
Gray sheet that can completely cover the sky but allows the Sun to be seen without a halo phenomenon; it can trigger heavy precipitation.
altocumulus ![click to hear](/images/speaker.jpg)
Cloud composed of large white or gray flecks that sometimes form parallel layers; it foreshadows the arrival of a depression.