Abbreviated Ns. Principal type or cloud genus, stratiform, gray and often dark and thick enough to block the sun. Usually, nimbostratus produce rain, snow, sleet, etc. In most cases, the precipitation reaches the ground, but not always.
Water mass located in the Atlantic between 3200 and 13000 feet (1000 and 4000 meters) of depth; it can be traced from there into most other oceans basins.
Method of forecasting the weather through digital computations done by supercomputers.