Cumulonimbus Cloud
Cumulonimbus (from the Latin cumulus ("heap") and nimbus ("cloud")) is a dense towering vertical cloud associated with thunderstorms and atmospheric instability, forming from water vapour carried by powerful upward air currents. Cumulonimbus may form alone, in clusters, or along cold front squall lines. They may produce lightning and other dangerous severe weather, such as gusts and hail. Cumulonimbus progress from over-developed cumulus congestus clouds, and may further develop as part of a supercell. Cumulonimbus is abbreviated Cb, and are designated in the D2 family.
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Famous quotes containing the word cloud:
“Here’s neither bush nor shrub to bear off any weather at all. And another storm brewing, I hear it sing i’ the wind. Yond same black cloud, yond huge one, looks like a foul bombard that would shed his liquor. If it should thunder as it did before, I know not where to hide my head. Yond same cloud cannot choose but fall by pailfuls.”
—William Shakespeare (1564–1616)