Thunderhead Clouds?

Answer

A thunderhead cloud, also known as a cumulonimbus cloud, is a dense towering vertical cloud. This cloud is most often associated with thunderstorms. They may produce severe weather, including lightning.
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Q&A Related to "Thunderhead Clouds?"
Its almost like another saying for. Cumulonimbus clouds. Cumulonimbus clouds are actually cumulus clouds that start off as Puffy, white clouds with flat bases. Since it is so large
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Cumulus clouds are also referred to thunderheads.
http://www.chacha.com/question/what-clouds-are-cal...
Cumulonimbus Cloud.
http://www.answerbag.co.uk/q_view/360081
thun·der·head (thndr-hd) n. The swollen upper portion of a thundercloud, usually associated with the development of a thunderstorm.
http://www.thefreedictionary.com/Thunderhead+(clou...
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A thunderstorm can be very frightening. When warm air in a cloud is warmer than the outside environment the conditions are said to be unstable. Strong updrafts ...
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