Precipitation shaft

Dark storm clouds under which a grey sheet of rain is falling on a city.
A rain shaft at the base of a thunderstorm

A precipitation shaft is a weather phenomenon, visible from the ground at large distances from the storm system, as a dark vertical shaft of heavy rain, hail, or snow, generally localized over a relatively small area.

This is different from a virga, which is a shaft of precipitation that evaporates before reaching the ground.


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