These dark clouds are associated with atmospheric ... Thunderhead clouds, or cumulonimbus clouds, are the towering giants of ...

At these heights, the atmosphere is cold enough that clouds are typically composed of ice crystals, not water droplets. These ...

In Spring Hill, Tennessee, residents captured timelapse footage of a large storm cloud developing. This is what meteorologists call a cumulonimbus cloud - one of the most destructive - that leads ...