"dumping rain" is correct and can be used in written English.
It is a common phrase used to describe heavy rainfall. Example: The storm was so severe that it was dumping rain on the city, causing flooding in many areas.
As Florence passed, churning the waters and dumping rain into the ocean, sea surface temperatures decreased.
The storm that devastated Mexico's Pacific coast over the weekend regained strength Wednesday and became Hurricane Manuel, dumping rain on fishing villages on the coast of Sinaloa state.
But this one stood dead still much of the day, dumping rain on a narrow corridor of northern New Jersey hour after hour after hour.
As of last night, the approaching storm was dumping rain in the lower Mississippi valley, said Bob Stalker, also a meteorologist in Brookhaven.
A ridge of high pressure that has hovered over the west coast for months, blocking normal weather patterns, eased and allowed a weather system to break through, dumping rain across swathes of California on Thursday and Friday.
It headed toward the Pacific ocean early on Friday after dumping rain on Costa Rica and Nicaragua and sparking emergency measures across a region that was also hit by a 7-magnitude earthquake.
Michael is expected to move quickly up the US East Coast, dumping rains on regions that are already saturated from Hurricane Florence last month.
Even the skies dumped rain on the Bronx to delay the start of Friday's game.
"That's not good as far as rainfall, because it will just sit here and dump rain".
When this air is forced to rise to get over the plateau, it dumps rain on the areas below.
Hurricane Camille, which did devastating damage to coastal Mississippi in 1969, dumped rain into Pennsylvania and New Jersey as well.
