• Cumulonimbus cloud over Africa

    Cumulonimbus cloud over Africa
    Date:25 April 2010

    High above the African continent, tall, dense cumulonimbus clouds, meaning 'column rain' in Latin, are the result of atmospheric instability.

    The clouds can form alone, in clusters, or along a cold front in a squall line.

    The high energy of these storms is associated with heavy precipitation, lightning, high wind speeds and tornadoes.

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