Wiktionary
n. The act of something being poured down. vb. (present participle of downpour English)
Usage examples of "downpouring".
Indeed, when Gazin the Juggler stood beneath one of those trees and called out laughingly to the birds above him, because their roundness and fatness amused him so, they responded with a downpouring of sticky spittle that brought howls of pain from him, and sent him rushing across the forest floor to plunge into the stream that ran through its middle.
It was still raining, a steady grey relentless downpouring from the low pregnant cloud-banks that seemed to press against the tree-tops, but Mark was dry.
It was obvious, in spite of the teeming rain, the downpouring torrent that turned the beam of his searchlight into liquid silver, that his visitor was a woman.