A Collection Of Spectacular Cloud Formations (Photos)
Weird Cloud Atlas: a collection of spectacular cloud formations, Weird Cloud Atlas: a collection of spectacular cloudformations, Weird Cloud Atlas: a collection of spectacular cloud formations, Weird Cloud Atlas: a collection of spectacular cloud formations
- Cirrus clouds are generally characterised by thin, wispy strands, giving them their name from the Latin word ‘cirrus’, which mean a ringlet or curling lock of hair. Cirrus clouds generally appear white or light grey in colour. They form when water vapour undergoes deposition at altitudes above 5,000m (16,500 ft) in temperate regions and above 6,100m (20,000 ft) in tropical regions. They often arrive in advance of bad weather systems or tropical cyclones and so often indicate that the weather conditions may soon deteriorate. Picture: Science Photo Library / Rex Features
- A skier looks at a lenticular cloud, Mauna Kea, Hawaii, US. Lenticular clouds are popular with UFO believers because they often look like flying saucers. The lens-shaped clouds form at high altitude and are usually formed when moist air passes over a mountain range and is heated adiabatically (that is, without any transference of heat energy) as it descends. The cloud pattern depends upon the wind speed and the shape of the mountains. A constant wind may produce clouds which are stable and remain virtually stationary in the sky for long periods. Picture: Science Photo Library / Rex Features
- Cumulonimbus cloud over western Africa near the Senegal-Mali border. Cumulonimbus clouds rise vertically until they hit a natural barrier, known as the tropopause, and then flatten out. Cumulonimbus clouds usually herald the onset of a severe storm. In this image, which was taken from the International Space Station (ISS), several cumulonimbus towers are seen underneath the main cloud, casting a large shadow on the land below. Picture: Science Photo Library / Rex Features
- Mammatus clouds over northeast South Dakota, . US. Mammatus, also known as mammatocumulus (meaning “mammary cloud” or “breast cloud”), is a meteorological term applied to a cellular pattern of pouches hanging underneath the base of a cloud. They can produce some dramatic and unusual patterns on the sky and are also associated with severe storms. Picture: Science Photo Library / Rex Features
- Sonic boom cloud created by an American F/A-18 Hornet over the Pacific Ocean. This fighter jet is not flying through a cloud, rather, it created the cloud by accelerating towards the speed of sound (768mph). As the aircraft moves through the air, an area of low pressure forms behind it. When the pressure of this air parcel falls below the vapour pressure of gaseous water, the water in the air condenses to form the cloud. Picture: Science Photo Library / Rex Features
- Tornadic supercell thunderstorm over a plain in Mycroft, Wyoming, US. Supercell thunderstorms rotate with immense energy, causing a strong updraft and severe weather, including tornadoes, hail, heavy rain, lightning and heavy winds. Inside these severe long-lived storms the wind speed and direction changes with height. This produces a strong rotating updraft of warm air (a mesocyclone) as well as a separate downdraft of cold air. Around a third of supercells produce tornadoes and are termed tornadic. Picture: Science Photo Library / Rex Features
- Pileus cloud above the Sarychev volcano as it erupts, Kuril Islands, Russia. Pileus clouds, also called scarf or cap clouds, are small clouds that form on top of a bigger cloud. In this photo a pileus cloud (centre) has formed above a cloud of volcanic ash from the Sarychev volcano. A large plume of smoke, steam and ash is erupting from the volcano while pyroclastic flow of denser ash descends the volcano sides. The picture was taken by astronauts aboard the International Space Station. Note too the ring of non-cloudy air surrounding the volcano that is thought to have been caused by the eruption. Picture: Science Photo Library / Rex Features
- Steam ring being blown from the Bocca Nuova vent of Mount Etna, Sicily. Steam rings are generated when a pulse of steam is ejected from a near-cylindrical volcanic vent. The steam in the centre of the pulse is propelled by thermal forces, whereas the steam at the edge of the ring suffers drag from the surrounding air. This results in an annular rotation, which in the correct conditions can become stable over a span of a few minutes and produce a steam ring. The process is similar to blowing smoke rings. Picture: Science Photo Library / Rex Features
- Noctilucent clouds are crystals of ice hanging around 80 kilometres high in the atmosphere that catch the light of the sun long after it has set on the horizon. Natural nacreous clouds occur at altitudes of 20-25 kilometres. The cloud in this image was formed from the exhaust of a missile launched from a distant firing range. Picture: Science Photo Library / Rex Features
- Sunlit contrail over South Wales. This image shows a vapour trail left by an aircraft lit by the sun below – so that it appears to be a fiery meteor. Picture: Science Photo Library / Rex Features
- Shelf cloud, Minnesota, USA. When seen from the ground shelf clouds appear as low, wedge-shaped clouds and are usually associated with severe thunderstorms. Picture: Science Photo Library / Rex Features
- Jetstream cirrus clouds the Sahara Desert, Egypt. The jetstream is a high-altitude, fast-moving air current a few thousand kilometres in length. Picture: Science Photo Library / Rex Features
- Altocumulus undulatus clouds, Abruzzo National Park, Italy. This cloud formation consists of parallel bands of cumulus clouds. It occurs when a layer of altocumulus cloud is affected by wind shear. Picture: Science Photo Library / Rex Features
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Some of these cloud formations are unlike anything I have ever seen. And does anyone else think that its interesting how much some of them resemble flying saucers?
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~Ophelia
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