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see cloudcloud,
aggregation of minute particles of water or ice suspended in the air. Formation of Clouds

Clouds are formed when air containing water vapor is cooled below a critical temperature called the dew point and the resulting moisture condenses into droplets on
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cumulonimbus (Cb)

cumulonimbus (Cb)
Towering clouds whose tops can rise to 65,000 ft and even higher. They are characterized by typical anvil-shaped tops when fully developed. Cbs, as they are popularly called, are thunderstorm clouds with extreme turbulence in them. They are associated with strong downdrafts under them. These clouds pose the maximum danger to aviation. Both downdrafts and updrafts exist within a cloud. On weather charts, cumulonimbus with clear tops are indicated by the symbol image; those without any clear-cut tops are indicated by the symbol image.
References in periodicals archive ?
Cumulonimbus clouds can grow to heights of more than 12 miles.
They are usually formed in association with large cumulonimbus clouds, particular when these are forming large thunderstorms.
Low pressure associated with high temperatures in the area led to the formation of convective clouds, and these then developed into cumulonimbus clouds.
Further significance is that the decaying anticylonic control enabled Cumulonimbus development to mature.
Wandering the bright lights of Manchester as lonely as a cloud (albeit a cumulonimbus in a pair of industrial strength Spanx) Bean longed for love, to make a connection with someone, anyone.
This is just a Cumulonimbus (thunderstorm cloud) enlightened by the sun," he wrote in a comment on the (http://www.
Nimbus," the suffix of cumulonimbus, means rain in Greek, and in this case will most likely mean thunderstorms.
It can detect cumulonimbus and other rain clouds by the minute but only in an area of 20 to 30 km radius.
Meanwhile, outside our frail craft the lightning flashes through the towering cumulonimbus clouds of impending economic doom, thick ice forms on the airspeed monitors, the autopilot disengages and, just as you reach screaming point, the bloke in the next seat turns out to be the BNP's Nick Griffin, who smiles and says "Turned out nice again, hasn't it?
The pilot sent a manual signal at 11pm local time saying he was flying through an area of CBs - electrically charged cumulonimbus clouds that come with violent winds and lightning.
Simon Keeling is the world's first Doctor of Broadcasting Meteorology Statocumulus is the most common cloud in the UK The cumulonimbus cloud produces heavy showers.
This has led to conditions conducive to the formation of cumulonimbus clouds and thunderstorms.