It's a general term used to describe any cloud that produces precipitation, regardless of its altitude or shape. So, a nimbus cloud could be:
* Low-level: Like a nimbostratus cloud, which is a dark, gray, layered cloud covering the entire sky and producing steady rain.
* Mid-level: Like a nimbostratus cloud, which is a dark, gray, layered cloud covering the entire sky and producing steady rain.
* High-level: Like a cumulonimbus cloud, which is a towering, thunderhead cloud that can produce heavy rain, hail, and even tornadoes.
Therefore, a nimbus cloud can be found anywhere in the sky, depending on the type of cloud and its formation.
