cumulonimbus cloud

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Related to Anvil clouds: Cumulo nimbus
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Noun1.cumulonimbus cloud - a dark cloud of great vertical extent charged with electricitycumulonimbus cloud - a dark cloud of great vertical extent charged with electricity; associated with thunderstorms
cloud - a visible mass of water or ice particles suspended at a considerable altitude
References in periodicals archive ?
Generally, storms of this magnitude have well-developed anvil tops; one of the "classic weather text" warnings about thunderstorms is to avoid "severe" thunderstorm clouds by at least 20 miles and avoid flying beneath anvil clouds at any distance from the cloud boundary.
Similarly, the highest frequencies of radar reflectivity occur in bins between -25 and -5 dBZ at heights between 7 and 12 km; these frequencies correspond to the long-lasting anvil clouds seen after 0600 UTC in Fig.
"The primary weather concerns for Saturday's launch are anvil clouds, cumulus clouds and flight through precipitation," the (https://blogs.nasa.gov/spacex/) forecast announcement on NASA's website said.