They may appear feathery, lumpy, pouch-like … may bring fair weather or a forerunner of typhoons and tornadoes but we can’t deny that these clouds are simply amazing.
Cirrus Cloud
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Cirrus clouds are the most common type of high-level clouds. They usually denote fair weather. Cirrus clouds appear white and feathery which form above 6000 m (20,000 ft). Made up primarily of ice crystal, they may appear in various shapes and sizes. Also, cirrus clouds have subtypes. The two main subtypes are cirrostratus, which resemble as thin blanketing cloud covering the sky and cirrocumulus that appears like a plate of bubble wrap. Cirrus clouds normally move across the sky from west to east.
Contrails
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Contrails or vapor trails are clouds of ice particles formed by the exhaust of aircraft engines. It is the product of hot exhaust gases from the jet’s engine combining with the cool environmental air. Depending on the whether condition, contrails may last for a few hours or for just a few seconds or minute (if the air is somewhat moist).
Nimbostratus
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Nimbostratus clouds belong to the low-level clouds forming their base between the surface and up to 2000 m. They are dark gray, formless cloud layer with a tattered base typically covering the whole sky in a thick layer. Though appearing worldwide, nimbostratus are common cloud type in temperate regions. These clouds occur along warm fronts and normally bring rains.
Altostratus
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Altostratus are middle height clouds (altitude from 2,400–6,100 m) characterized by a gray or bluish layer of evenly and opaquely appearance. These clouds are formed when a front of warm air is lifted into higher altitudes then condensed. Altostratus are mainly composed of water droplets. They usually covers the sky but having some thin layers, the sun or moon shine through only a little. If these clouds thicken, then occasionally rain or snow follows.
Orographic
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